path: root/results/classifier/zero-shot/118/all/1696773

user-level: 0.933
risc-v: 0.924
device: 0.921
permissions: 0.906
ppc: 0.904
peripherals: 0.898
register: 0.894
TCG: 0.893
debug: 0.892
performance: 0.886
architecture: 0.884
virtual: 0.884
kernel: 0.883
socket: 0.882
mistranslation: 0.882
vnc: 0.880
arm: 0.880
boot: 0.877
PID: 0.876
assembly: 0.875
VMM: 0.874
graphic: 0.873
network: 0.870
hypervisor: 0.861
semantic: 0.861
files: 0.860
KVM: 0.854
x86: 0.851
i386: 0.794

golang calls to exec crash user emulation

An example program can be found here:

https://github.com/willnewton/qemucrash

This code starts a goroutine (thread) and calls exec repeatedly. This works ok natively but when run under ARM user emulation it segfaults (usually, there are occasionally other failures).

You will need to apply the patch from https://bugs.launchpad.net/qemu/+bug/1696353 to run this sample app on current master.

This bug is mentioned in this account from Cloudflare of porting their software stack to arm64:

https://blog.cloudflare.com/porting-our-software-to-arm64/

The relevant section from that blog reads as follows:

# Intermittent Go Failures

> With a decent amount of Go code running through our CI system, it was easy to spot a trend of intermittent segfaults.

> Going on a hunch, we confirmed a hypothesis that non-deterministic failures are generally due to threading issues. Unfortunately, opinion on the issue tracker showed that Go / QEMU incompatibilities aren’t a priority, so we were left without an upstream fix.

> The workaround we came up with is simple: if the problem is threading-related, limit where the threads can run! When we package our internal go binaries, we add a .deb post-install script to detect if we’re running under ARM64 emulation, and if so, reduce the number of CPUs the go binary can run under to one. We lose performance by pinning to one CPU, but this slowdown is negligible when we’re already running under emulation, and slow code is better than non-working code.

> With the workaround in place, reports of intermittent crashes dropped to zero. Onto the next problem!

Observed the same here... (details of the environment at the end of the post)

Just building a hello world is good enough to crash go 3 times out of 4:

--8<---------------------------------------------------------------------
ubuntu@qemu:~$ cat <<EOF > hello.go
> package main
> 
> import "fmt"
> 
> func main() {
>   fmt.Println("Hello")
> }
> EOF

--8<---------------------------------------------------------------------

If I build it with affinity set to a single CPU, all is fine:

ubuntu@qemu:~$ taskset -c 1 /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go build
ubuntu@qemu:~$ taskset -c 1 /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go build
ubuntu@qemu:~$ taskset -c 1 /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go build
ubuntu@qemu:~$ taskset -c 1 /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go build


But with the go build going multithreaded, all sorts of hells break loose:

--8<---------------------------------------------------------------------
ubuntu@qemu:~$ /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go build
fatal error: exitsyscall: syscall frame is no longer valid
fatal error: malloc deadlock
panic during panic

runtime stack:
runtime.startpanic_m()
	/usr/lib/go-1.10/src/runtime/panic.go:690 +fatal error: unexpected signal during runtime execution
0x178stack trace unavailable
--8<---------------------------------------------------------------------

or this:

--8<---------------------------------------------------------------------
ubuntu@qemu:~$ /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go build
fatal error: unexpected signal value
panic during panic

goroutine 0 [idle]:
runtime: unexpected return pc for runtime.sigtramp called from 0x14420009ff0
stack: frame={sp:0x14420007900, fp:0x14420007920} stack=[0x14420002000,0x1442000a000)
0000014420007800:  0000000000000000  0000000000000084 
0000014420007810:  000000000043d694 <runtime.sigtrampgo+44>  0000000000000000 
0000014420007820:  0000000000000000  0000000000000000 
0000014420007830:  00000144200ae000  0000000000000000 
0000014420007840:  0000014420007920  00000144200079a0 
0000014420007850:  000000000045266c <runtime.sigtramp+52>  0000014400000004 
0000014420007860:  0000014420007920  00000144200079a0 
0000014420007870:  00000144200ae180  0000000000000000 
0000014420007880:  0000000000000000  0000000000000000 
0000014420007890:  0000000000000000  0000000000000000 
00000144200078a0:  0000000000000000  0000000000000000 
00000144200078b0:  0000000000000000  00000144200ae180 
00000144200078c0:  0000000000000000  0000000000000000 
00000144200078d0:  0000000000000000  0000000000000000 
00000144200078e0:  0000000000000000  0000000000000000 
00000144200078f0:  0000000000000000  0000000000000000 
0000014420007900: <0000014420009ff0  0000000000000004 
0000014420007910:  0000014420007920  00000144200079a0 
0000014420007920: >0000000000000004  0000000000000002 
0000014420007930:  00000144201a4180  0000000000000000 
0000014420007940:  000000000000000c  0000000000000001 
0000014420007950:  0000000000000000  0000000000000000 
0000014420007960:  0000000000000000  0000000000000000 
0000014420007970:  0000000000000000  0000000000000000 
0000014420007980:  0000000000000000  0000000000000000 
0000014420007990:  0000000000000000  0000000000000000 
00000144200079a0:  0000000000000000  0000000000000000 
00000144200079b0:  0000014420002000  0000000000000000 
00000144200079c0:  0000000000008000  0000000000000000 
00000144200079d0:  0000000000000000  0000000000000000 
00000144200079e0:  0000000000000000  0000000000000000 
00000144200079f0:  0000000000000000  0000000000000000 
0000014420007a00:  0000000000000000  0000000000000000 
0000014420007a10:  0000000000000000  0000000000000000 
runtime.startpanic_m()
	/usr/lib/go-1.10/src/runtime/panic.go:690 +0x178
runtime.startpanic()
	/usr/lib/go-1.10/src/runtime/panic.go:589 +0x14
runtime.sighandler(0x14400000004, 0x14420007920, 0x144200079a0, 0x144200ae180)
	/usr/lib/go-1.10/src/runtime/signal_sighandler.go:86 +0x4c4
runtime.sigtrampgo(0x4, 0x14420007920, 0x144200079a0)
	/usr/lib/go-1.10/src/runtime/signal_unix.go:349 +0x19c
runtime: unexpected return pc for runtime.sigtramp called from 0x14420009ff0
stack: frame={sp:0x14420007900, fp:0x14420007920} stack=[0x14420002000,0x1442000a000)
0000014420007800:  0000000000000000  0000000000000084 
0000014420007810:  000000000043d694 <runtime.sigtrampgo+44>  0000000000000000 
0000014420007820:  0000000000000000  0000000000000000 
0000014420007830:  00000144200ae000  0000000000000000 
0000014420007840:  0000014420007920  00000144200079a0 
0000014420007850:  000000000045266c <runtime.sigtramp+52>  0000014400000004 
0000014420007860:  0000014420007920  00000144200079a0 
0000014420007870:  00000144200ae180  0000000000000000 
0000014420007880:  0000000000000000  0000000000000000 
0000014420007890:  0000000000000000  0000000000000000 
00000144200078a0:  0000000000000000  0000000000000000 
00000144200078b0:  0000000000000000  00000144200ae180 
00000144200078c0:  0000000000000000  0000000000000000 
00000144200078d0:  0000000000000000  0000000000000000 
00000144200078e0:  0000000000000000  0000000000000000 
00000144200078f0:  0000000000000000  0000000000000000 
0000014420007900: <0000014420009ff0  0000000000000004 
0000014420007910:  0000014420007920  00000144200079a0 
0000014420007920: >0000000000000004  0000000000000002 
0000014420007930:  00000144201a4180  0000000000000000 
0000014420007940:  000000000000000c  0000000000000001 
0000014420007950:  0000000000000000  0000000000000000 
0000014420007960:  0000000000000000  0000000000000000 
0000014420007970:  0000000000000000  0000000000000000 
0000014420007980:  0000000000000000  0000000000000000 
0000014420007990:  0000000000000000  0000000000000000 
00000144200079a0:  0000000000000000  0000000000000000 
00000144200079b0:  0000014420002000  0000000000000000 
00000144200079c0:  0000000000008000  0000000000000000 
00000144200079d0:  0000000000000000  0000000000000000 
00000144200079e0:  0000000000000000  0000000000000000 
00000144200079f0:  0000000000000000  0000000000000000 
0000014420007a00:  0000000000000000  0000000000000000 
0000014420007a10:  0000000000000000  0000000000000000 
runtime.sigtramp(0x2, 0x144201a4180, 0x0, 0xc, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/usr/lib/go-1.10/src/runtime/sys_linux_arm64.s:263 +0x34

goroutine 88 [syscall]:
syscall.Syscall6(0x5f, 0x1, 0x2039, 0x144205909a0, 0x1000004, 0x0, 0x0, 0x144201a2320, 0x144200ac000, 0x40009efaf8)
	/usr/lib/go-1.10/src/syscall/asm_linux_arm64.s:36 +0x8 fp=0x14420590940 sp=0x14420590930 pc=0x471870
os.(*Process).blockUntilWaitable(0x1442036c000, 0x0, 0x0, 0x410a64)
	/usr/lib/go-1.10/src/os/wait_waitid.go:31 +0x64 fp=0x14420590a40 sp=0x14420590940 pc=0x49077c
os.(*Process).wait(0x1442036c000, 0x14420262310, 0x144205841e0, 0x144203d6398)
	/usr/lib/go-1.10/src/os/exec_unix.go:22 +0x2c fp=0x14420590ac0 sp=0x14420590a40 pc=0x48a234
os.(*Process).Wait(0x1442036c000, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20 fp=0x14420590af0 sp=0x14420590ac0 pc=0x489898
os/exec.(*Cmd).Wait(0x144203d62c0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c fp=0x14420590b70 sp=0x14420590af0 pc=0x4e1354
os/exec.(*Cmd).Run(0x144203d62c0, 0x144200f6150, 0x14420440840)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48 fp=0x14420590b90 sp=0x14420590b70 pc=0x4e0ad0
cmd/go/internal/work.(*Builder).toolID(0x1442029c0a0, 0x826cab, 0x3, 0x11, 0x14420591290)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274 fp=0x14420590d40 sp=0x14420590b90 pc=0x5bc57c
cmd/go/internal/work.(*Builder).buildActionID(0x1442029c0a0, 0x144201537c0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:221 +0x116c fp=0x14420591450 sp=0x14420590d40 pc=0x5c0e04
cmd/go/internal/work.(*Builder).build(0x1442029c0a0, 0x144201537c0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64 fp=0x14420591e70 sp=0x14420591450 pc=0x5c153c
cmd/go/internal/work.(*Builder).Do.func1(0x144201537c0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50 fp=0x14420591ef0 sp=0x14420591e70 pc=0x5e7cd8
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c fp=0x14420591fc0 sp=0x14420591ef0 pc=0x5e7f74
runtime.goexit()
	/usr/lib/go-1.10/src/runtime/asm_arm64.s:1037 +0x4 fp=0x14420591fc0 sp=0x14420591fc0 pc=0x451cec
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 1 [semacquire]:
sync.runtime_Semacquire(0x1442027725c)
	/usr/lib/go-1.10/src/runtime/sema.go:56 +0x2c
sync.(*WaitGroup).Wait(0x14420277250)
	/usr/lib/go-1.10/src/sync/waitgroup.go:129 +0x68
cmd/go/internal/work.(*Builder).Do(0x1442029c0a0, 0x14420152c80)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:173 +0x36c
cmd/go/internal/work.runBuild(0xa5d0a0, 0x144200da010, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/build.go:325 +0x4bc
main.main()
	/usr/lib/go-1.10/src/cmd/go/main.go:140 +0x6f4

goroutine 19 [syscall]:
os/signal.signal_recv(0x0)
	/usr/lib/go-1.10/src/runtime/sigqueue.go:139 +0xc8
os/signal.loop()
	/usr/lib/go-1.10/src/os/signal/signal_unix.go:22 +0x18
created by os/signal.init.0
	/usr/lib/go-1.10/src/os/signal/signal_unix.go:28 +0x30

goroutine 11 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 12 [syscall]:
syscall.Syscall6(0x5f, 0x1, 0x2008, 0x1442059e9a0, 0x1000004, 0x0, 0x0, 0x144203d8140, 0x1442006ec00, 0x40009e31e8)
	/usr/lib/go-1.10/src/syscall/asm_linux_arm64.s:36 +0x8
os.(*Process).blockUntilWaitable(0x144203e2240, 0x0, 0x0, 0x410a64)
	/usr/lib/go-1.10/src/os/wait_waitid.go:31 +0x64
os.(*Process).wait(0x144203e2240, 0x1442026a180, 0x14420544020, 0x1442058a238)
	/usr/lib/go-1.10/src/os/exec_unix.go:22 +0x2c
os.(*Process).Wait(0x144203e2240, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20
os/exec.(*Cmd).Wait(0x1442058a160, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c
os/exec.(*Cmd).Run(0x1442058a160, 0x14420132150, 0x14420318840)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x1442029c0a0, 0x8285a2, 0x7, 0x2c, 0x1442059f320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x1442029c0a0, 0x1442017c8c0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x1442029c0a0, 0x1442017c8c0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x1442017c8c0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 13 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 14 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 15 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 16 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 82 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 83 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 84 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 85 [runnable]:
os.(*File).Read(0x144200d4060, 0x144202ac000, 0x8000, 0x8000, 0x8000, 0x8000, 0x7ed900)
	/usr/lib/go-1.10/src/os/file.go:103 +0x24c
io.copyBuffer(0x40b3596000, 0x144203f8000, 0x894040, 0x144200d4060, 0x144202ac000, 0x8000, 0x8000, 0x7ed900, 0x144200d4000, 0x40b3596000)
	/usr/lib/go-1.10/src/io/io.go:400 +0x100
io.Copy(0x40b3596000, 0x144203f8000, 0x894040, 0x144200d4060, 0x144203f8000, 0x0, 0x29)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
cmd/go/internal/cache.FileHash(0x144200cc8a0, 0x29, 0x0, 0x0, 0x0, 0x0, 0x144200cc8a0, 0x29)
	/usr/lib/go-1.10/src/cmd/go/internal/cache/hash.go:149 +0x228
cmd/go/internal/work.(*Builder).fileHash(0x1442029c0a0, 0x144200cc8a0, 0x29, 0x144200cc8a0, 0x29)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:358 +0x28
cmd/go/internal/work.(*Builder).buildActionID(0x1442029c0a0, 0x14420153400, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:286 +0x650
cmd/go/internal/work.(*Builder).build(0x1442029c0a0, 0x14420153400, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x14420153400)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 86 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 87 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 89 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 90 [syscall]:
syscall.Syscall6(0x5f, 0x1, 0x1ffd, 0x1442058e9a0, 0x1000004, 0x0, 0x0, 0x14420236140, 0x1442006f400, 0x40009e2b20)
	/usr/lib/go-1.10/src/syscall/asm_linux_arm64.s:36 +0x8
os.(*Process).blockUntilWaitable(0x1442055a300, 0x0, 0x0, 0x410a64)
	/usr/lib/go-1.10/src/os/wait_waitid.go:31 +0x64
os.(*Process).wait(0x1442055a300, 0x144201f6110, 0x144205d6040, 0x144202a00d8)
	/usr/lib/go-1.10/src/os/exec_unix.go:22 +0x2c
os.(*Process).Wait(0x1442055a300, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20
os/exec.(*Cmd).Wait(0x144202a0000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c
os/exec.(*Cmd).Run(0x144202a0000, 0x14420144070, 0x144205de580)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x1442029c0a0, 0x8285a2, 0x7, 0x2c, 0x1442058f320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x1442029c0a0, 0x1442017c780, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x1442029c0a0, 0x1442017c780, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x1442017c780)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 91 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 92 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 93 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 94 [syscall]:
syscall.Syscall6(0x5f, 0x1, 0x2036, 0x1442058c9a0, 0x1000004, 0x0, 0x0, 0x144203d8320, 0x1442038ec00, 0x40009ef430)
	/usr/lib/go-1.10/src/syscall/asm_linux_arm64.s:36 +0x8
os.(*Process).blockUntilWaitable(0x144200284b0, 0x0, 0x0, 0x410a64)
	/usr/lib/go-1.10/src/os/wait_waitid.go:31 +0x64
os.(*Process).wait(0x144200284b0, 0x1442026a2a0, 0x144205441a0, 0x1442058a4f8)
	/usr/lib/go-1.10/src/os/exec_unix.go:22 +0x2c
os.(*Process).Wait(0x144200284b0, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20
os/exec.(*Cmd).Wait(0x1442058a420, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c
os/exec.(*Cmd).Run(0x1442058a420, 0x144201322a0, 0x14420319080)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x1442029c0a0, 0x826cab, 0x3, 0x11, 0x1442058d290)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x1442029c0a0, 0x14420153a40, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:221 +0x116c
cmd/go/internal/work.(*Builder).build(0x1442029c0a0, 0x14420153a40, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x14420153a40)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 95 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 96 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 97 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 98 [syscall]:
syscall.Syscall6(0x5f, 0x1, 0x2033, 0x1442059c9a0, 0x1000004, 0x0, 0x0, 0x14420274730, 0x144205b0000, 0x40009e2b20)
	/usr/lib/go-1.10/src/syscall/asm_linux_arm64.s:36 +0x8
os.(*Process).blockUntilWaitable(0x1442055a660, 0x0, 0x0, 0x410a64)
	/usr/lib/go-1.10/src/os/wait_waitid.go:31 +0x64
os.(*Process).wait(0x1442055a660, 0x144200c4380, 0x1442033e1a0, 0x144200eee98)
	/usr/lib/go-1.10/src/os/exec_unix.go:22 +0x2c
os.(*Process).Wait(0x1442055a660, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20
os/exec.(*Cmd).Wait(0x144200eedc0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c
os/exec.(*Cmd).Run(0x144200eedc0, 0x144201123f0, 0x144205e0dc0)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x1442029c0a0, 0x826cab, 0x3, 0x11, 0x1442059d290)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x1442029c0a0, 0x14420153cc0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:221 +0x116c
cmd/go/internal/work.(*Builder).build(0x1442029c0a0, 0x14420153cc0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x14420153cc0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 99 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x14420277250, 0x1442029c0a0, 0x144201ae940)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 133 [IO wait]:
internal/poll.runtime_pollWait(0x4089492918, 0x72, 0x144201aa000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x144203d82e8, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x144203d82e8, 0x144201aa001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144203d82d0, 0x144201aa000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x144203da060, 0x144201aa000, 0x200, 0x200, 0x144201aa000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x144203da060, 0x144201aa000, 0x200, 0x200, 0x14420268528, 0x1, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x144201322a0, 0x894040, 0x144203da060, 0x40ab556000, 0x144201322a0, 0x404701)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x144201322a0, 0x894040, 0x144203da060, 0x0, 0x0, 0x0, 0x4e37c4, 0x14420268500, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x144201322a0, 0x894040, 0x144203da060, 0x0, 0x4e3830, 0x1442016a060)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x1442016a060, 0x1442046bfb0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x1442058a420, 0x14420544240)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 73 [runnable]:
internal/poll.runtime_pollWait(0x4089492d28, 0x72, 0x144202b4019)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x14420236068, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x14420236068, 0x144202b4001, 0x5e7, 0x5e7)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x14420236050, 0x144202b4019, 0x5e7, 0x5e7, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x1442008a010, 0x144202b4019, 0x5e7, 0x5e7, 0x144202b4000, 0x144201a6000, 0x19)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x1442008a010, 0x144202b4019, 0x5e7, 0x5e7, 0x19, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x14420144000, 0x894040, 0x1442008a010, 0x40ab556000, 0x14420144000, 0x1442047de01)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x14420144000, 0x894040, 0x1442008a010, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x14420144000, 0x894040, 0x1442008a010, 0x0, 0x144201b0180, 0x5e7fc4)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x5e7fe8, 0x1)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144202a0000, 0x144205d60a0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 74 [runnable]:
internal/poll.runtime_pollWait(0x4089492b88, 0x72, 0x144204e4200)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x14420236108, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x14420236108, 0x144204e4201, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144202360f0, 0x144204e4200, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x1442008a028, 0x144204e4200, 0x200, 0x200, 0x144204e4200, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x1442008a028, 0x144204e4200, 0x200, 0x200, 0x0, 0x0, 0x144201a51b8)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x14420144070, 0x894040, 0x1442008a028, 0x40ab556000, 0x14420144070, 0x1442047d601)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x14420144070, 0x894040, 0x1442008a028, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x14420144070, 0x894040, 0x1442008a028, 0x0, 0x144201b0180, 0x5e7fc4)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x5e7fe8, 0x1)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144202a0000, 0x144205d60e0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 132 [IO wait]:
internal/poll.runtime_pollWait(0x4089492ec8, 0x72, 0x144204a4000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x144203d8248, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x144203d8248, 0x144204a4001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144203d8230, 0x144204a4000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x144203da048, 0x144204a4000, 0x200, 0x200, 0x144204a4000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x144203da048, 0x144204a4000, 0x200, 0x200, 0x144200d62a8, 0x1, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x144201321c0, 0x894040, 0x144203da048, 0x40ab556000, 0x144201321c0, 0x404701)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x144201321c0, 0x894040, 0x144203da048, 0x0, 0x0, 0x0, 0x4e37c4, 0x144200d6280, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x144201321c0, 0x894040, 0x144203da048, 0x0, 0x4e3830, 0x144200aa0c0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x144200aa0c0, 0x14420537fb0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x1442058a420, 0x14420544200)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 75 [IO wait]:
internal/poll.runtime_pollWait(0x402b24ee30, 0x72, 0x1442033a000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x14420274658, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x14420274658, 0x1442033a001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x14420274640, 0x1442033a000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x144203dc048, 0x1442033a000, 0x200, 0x200, 0x1442033a000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x144203dc048, 0x1442033a000, 0x200, 0x200, 0x0, 0x0, 0x144201a5038)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x14420112310, 0x894040, 0x144203dc048, 0x40ab556000, 0x14420112310, 0x1442047ce01)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x14420112310, 0x894040, 0x144203dc048, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x14420112310, 0x894040, 0x144203dc048, 0x0, 0x144201b0180, 0x5e7fc4)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x5e7fe8, 0x1)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144200eedc0, 0x1442033e200)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 76 [IO wait]:
internal/poll.runtime_pollWait(0x402b24ec90, 0x72, 0x1442033c000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x144202746f8, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x144202746f8, 0x1442033c001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144202746e0, 0x1442033c000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x144203dc060, 0x1442033c000, 0x200, 0x200, 0x1442033c000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x144203dc060, 0x1442033c000, 0x200, 0x200, 0x0, 0x0, 0x144201a4eb8)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x144201123f0, 0x894040, 0x144203dc060, 0x40ab556000, 0x144201123f0, 0x1442047c601)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x144201123f0, 0x894040, 0x144203dc060, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x144201123f0, 0x894040, 0x144203dc060, 0x0, 0x144201b0180, 0x5e7fc4)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x5e7fe8, 0x1)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144200eedc0, 0x1442033e240)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 162 [runnable]:
os/exec.(*Cmd).Start.func1(0x144203d62c0, 0x14420584240)
	/usr/lib/go-1.10/src/os/exec/exec.go:395
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 163 [runnable]:
os/exec.(*Cmd).Start.func1(0x144203d62c0, 0x14420584280)
	/usr/lib/go-1.10/src/os/exec/exec.go:395
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468
--8<---------------------------------------------------------------------

It worked once for me:

--8<---------------------------------------------------------------------
ubuntu@qemu:~$ /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go build
--8<---------------------------------------------------------------------

but then again:

--8<---------------------------------------------------------------------
ubuntu@qemu:~$ /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go build
�Afatal error: malloc deadlock
panic during panic
[signal SIGSEGV: segmentation violation code=0x1 addr=0x90 pc=0x90]

runtime stack:
runtime.startpanic_m()
	/usr/lib/go-1.10/src/runtime/panic.go:690 +0x178
SIGILL: illegal instructionruntime.systemstack(
0x4000000000PC=0x44f790)
	/usr/lib/go-1.10/src/runtime/asm_arm64.s:229 + m=0x8c
19runtime.mstart sigcode=()
2	/usr/lib/go-1.10/src/runtime/proc.go
:1175


goroutine goroutine 80 [ [idlerunning]:
]:
runtime.systemstack_switch()
	/usr/lib/go-1.10/src/runtime/asm_arm64.s:178 +0x8 fp=0x144205dcc30runtime.morestack sp=()
	0x144205dcc20/usr/lib/go-1.10/src/runtime/asm_arm64.s:301 pc= +0x68
0x44f650
runtime.startpanic()
	/usr/lib/go-1.10/src/runtime/panic.go:589 +
0x14goroutine  fp=80x144205dcc40 [ sp=running0x144205dcc30]:
 pc=0x428efc
runtime.systemstack_switch()
runtime.throw	(/usr/lib/go-1.10/src/runtime/asm_arm64.s0x82ca61:178 +0x8,  fp=0x144205dcc30 sp=0x144205dcc20 pc=0x44f6500xf
)
runtime.startpanic	(/usr/lib/go-1.10/src/runtime/panic.go)
:	615/usr/lib/go-1.10/src/runtime/panic.go +:0x54589 fp= +0x144205dcc600x14 sp= fp=0x144205dcc400x144205dcc40 pc= sp=0x428fec0x144205dcc30
 pc=0x428efc
runtime.throw(0x82ca61, 0xf)
	/usr/lib/go-1.10/src/runtime/panic.go:615 +0x54 fp=0x144205dcc60 sp=0x144205dcc40 pc=0x428fec
runtime.mallocgcruntime.mallocgc((0x100x10, , 0x78e2800x78e280, , 0x144202ca0010x144202ca001, , 0x00x0)
)
		/usr/lib/go-1.10/src/runtime/malloc.go/usr/lib/go-1.10/src/runtime/malloc.go::621621 + +0x8180x818 fp= fp=0x144205dcd100x144205dcd10 sp= sp=0x144205dcc600x144205dcc60 pc= pc=0x410e200x410e20

runtime.convT2Estringruntime.convT2Estring(0x78e280(, 0x78e2800x144205dcf60, , 0x144205dcf600x7, , 0x70x144203aa270, )
	0x144203aa270/usr/lib/go-1.10/src/runtime/iface.go)
:	365/usr/lib/go-1.10/src/runtime/iface.go +:0x58365 fp= +0x144205dcd40 sp=0x580x144205dcd10 fp= pc=0x144205dcd400x40ead0 sp=0x144205dcd10
 pc=0x40ead0
cmd/go/internal/work.(*Builder).buildActionID(0x144202a60a0, 0x14420174140, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xc2c fp=0x144205dd450 sp=0x144205dcd40cmd/go/internal/work.(*Builder).buildActionID pc=0x5c08c4(
0x144202a60a0cmd/go/internal/work.(*Builder).build, (0x144201741400x144202a60a0, , 0x00x14420174140, , 0x00x0, , 0x00x0, )
0x0	)
/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go	:/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go304: +2190x64 + fp=0xc2c0x144205dde70 fp= sp=0x144205dd4500x144205dd450 sp= pc=0x144205dcd400x5c153c pc=
0x5c08c4
cmd/go/internal/work.(*Builder).Do.func1(0x14420174140cmd/go/internal/work.(*Builder).build)
(	0x144202a60a0/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go, :0x14420174140106,  +0x00x50,  fp=0x00x144205ddef0)
 sp=	0x144205dde70/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go pc=:0x5e7cd8304
 +0x64cmd/go/internal/work.(*Builder).Do.func2 fp=(0x144205dde700x144200ca7b0 sp=, 0x144205dd4500x144202a60a0 pc=, 0x5c153c0x1442019a9a0)

	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:cmd/go/internal/work.(*Builder).Do.func1164( +0x144201741400x8c)
 fp=	0x144205ddfc0/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go sp=:0x144205ddef0106 pc= +0x5e7f740x50
 fp=0x144205ddef0runtime.goexit sp=(0x144205dde70)
 pc=	0x5e7cd8/usr/lib/go-1.10/src/runtime/asm_arm64.s
:1037cmd/go/internal/work.(*Builder).Do.func2 +(0x40x144200ca7b0 fp=, 0x144205ddfc00x144202a60a0 sp=, 0x144205ddfc00x1442019a9a0 pc=)
0x451cec	
/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c fp=0x144205ddfc0 sp=0x144205ddef0 pc=0x5e7f74
runtime.goexit()
	/usr/lib/go-1.10/src/runtime/asm_arm64.s:created by 1037 +0x4cmd/go/internal/work.(*Builder).Do fp=0x144205ddfc0
 sp=0x144205ddfc0 pc=0x451cec
created by cmd/go/internal/work.(*Builder).Do
		/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go::151151 + +0x34c0x34c


goroutine 1 [semacquire]:
sync.runtime_Semacquire(0x144200ca7bc)
	/usr/lib/go-1.10/src/runtime/sema.go:56 +0x2c
sync.(*WaitGroup).Wait(0x144200ca7b0)
	/usr/lib/go-1.10/src/sync/waitgroup.go:129 +0x68
cmd/go/internal/work.(*Builder).Do(0x144202a60a0, 0x1442014b040)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:173 +0x36c
cmd/go/internal/work.runBuild(0xa5d0a0, 0x144200d4010, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/build.go:325 +0x4bc
main.main()
	/usr/lib/go-1.10/src/cmd/go/main.go:140 +0x6f4

goroutine 19 [syscall]:
os/signal.signal_recv(0x0)
	/usr/lib/go-1.10/src/runtime/sigqueue.go:139 +0xc8
os/signal.loop()
	/usr/lib/go-1.10/src/os/signal/signal_unix.go:22 +0x18
created by os/signal.init.0
	/usr/lib/go-1.10/src/os/signal/signal_unix.go:28 +0x30

goroutine 9 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 10 [chan receive]:
os/exec.(*Cmd).Wait(0x1442011e000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:469 +0xe4
os/exec.(*Cmd).Run(0x1442011e000, 0x14420142070, 0x1442015c000)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x144202a60a0, 0x8285a2, 0x7, 0x2c, 0x144204ed320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x144202a60a0, 0x14420174000, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x144202a60a0, 0x14420174000, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x14420174000)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 11 [chan receive]:
os/exec.(*Cmd).Wait(0x144202aa000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:469 +0xe4
os/exec.(*Cmd).Run(0x144202aa000, 0x144200f0070, 0x14420204000)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x144202a60a0, 0x8285a2, 0x7, 0x2c, 0x144205df320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x144202a60a0, 0x1442014b7c0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x144202a60a0, 0x1442014b7c0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x1442014b7c0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 12 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 13 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 14 [runnable]:
syscall.Wait4(0x20dd, 0x144204eea80, 0x0, 0x144203a2000, 0x2, 0x2, 0x2)
	/usr/lib/go-1.10/src/syscall/syscall_linux.go:252 +0x74
os.(*Process).wait(0x144200283f0, 0x144202d4060, 0x1442037c020, 0x144202c80d8)
	/usr/lib/go-1.10/src/os/exec_unix.go:38 +0x7c
os.(*Process).Wait(0x144200283f0, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20
os/exec.(*Cmd).Wait(0x144202c8000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c
os/exec.(*Cmd).Run(0x144202c8000, 0x1442012a070, 0x14420136000)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x144202a60a0, 0x8285a2, 0x7, 0x2c, 0x144204ef320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x144202a60a0, 0x14420174b40, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x144202a60a0, 0x14420174b40, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x14420174b40)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 15 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 16 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 82 [runnable]:
syscall.Wait4(0x20e5, 0x144204f2a80, 0x0, 0x1442022e000, 0x2, 0x2, 0x2)
	/usr/lib/go-1.10/src/syscall/syscall_linux.go:252 +0x74
os.(*Process).wait(0x14420376390, 0x144205f4060, 0x1442019a020, 0x144203440d8)
	/usr/lib/go-1.10/src/os/exec_unix.go:38 +0x7c
os.(*Process).Wait(0x14420376390, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20
os/exec.(*Cmd).Wait(0x14420344000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c
os/exec.(*Cmd).Run(0x14420344000, 0x1442010c150, 0x144204cc000)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x144202a60a0, 0x8285a2, 0x7, 0x2c, 0x144204f3320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x144202a60a0, 0x1442014be00, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x144202a60a0, 0x1442014be00, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x1442014be00)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 83 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 84 [syscall]:
syscall.Syscall6(0x5f, 0x1, 0x20d8, 0x144204e69a0, 0x1000004, 0x0, 0x0, 0x144202ac140, 0x1442009c800, 0x40009e16c8)
	/usr/lib/go-1.10/src/syscall/asm_linux_arm64.s:36 +0x8
os.(*Process).blockUntilWaitable(0x144200c67e0, 0x0, 0x0, 0x410a64)
	/usr/lib/go-1.10/src/os/wait_waitid.go:31 +0x64
os.(*Process).wait(0x144200c67e0, 0x144201ee0d0, 0x14420524020, 0x144202dc0d8)
	/usr/lib/go-1.10/src/os/exec_unix.go:22 +0x2c
os.(*Process).Wait(0x144200c67e0, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20
os/exec.(*Cmd).Wait(0x144202dc000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c
os/exec.(*Cmd).Run(0x144202dc000, 0x14420150070, 0x14420324580)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x144202a60a0, 0x8285a2, 0x7, 0x2c, 0x144204e7320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x144202a60a0, 0x14420174c80, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x144202a60a0, 0x14420174c80, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x14420174c80)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 85 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 86 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 87 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 88 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 89 [runnable]:
syscall.Wait4(0x20e9, 0x144204f0a80, 0x0, 0x1442022c000, 0x2, 0x2, 0x2)
	/usr/lib/go-1.10/src/syscall/syscall_linux.go:252 +0x74
os.(*Process).wait(0x144205f01e0, 0x1442025c1c0, 0x144204e4020, 0x144200c00d8)
	/usr/lib/go-1.10/src/os/exec_unix.go:38 +0x7c
os.(*Process).Wait(0x144205f01e0, 0x0, 0x0, 0x856708)
	/usr/lib/go-1.10/src/os/exec.go:123 +0x20
os/exec.(*Cmd).Wait(0x144200c0000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:461 +0x3c
os/exec.(*Cmd).Run(0x144200c0000, 0x1442013c070, 0x144200e8000)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x144202a60a0, 0x8285a2, 0x7, 0x2c, 0x144204f1320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x144202a60a0, 0x1442014bcc0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x144202a60a0, 0x1442014bcc0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x1442014bcc0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 90 [chan receive]:
os/exec.(*Cmd).Wait(0x144203e6000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:469 +0xe4
os/exec.(*Cmd).Run(0x144203e6000, 0x144201300e0, 0x144200ea000)
	/usr/lib/go-1.10/src/os/exec/exec.go:305 +0x48
cmd/go/internal/work.(*Builder).toolID(0x144202a60a0, 0x8285a2, 0x7, 0x2c, 0x144204eb320)
	/usr/lib/go-1.10/src/cmd/go/internal/work/buildid.go:183 +0x274
cmd/go/internal/work.(*Builder).buildActionID(0x144202a60a0, 0x1442014b400, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:219 +0xbec
cmd/go/internal/work.(*Builder).build(0x144202a60a0, 0x1442014b400, 0x0, 0x0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:304 +0x64
cmd/go/internal/work.(*Builder).Do.func1(0x1442014b400)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:106 +0x50
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:164 +0x8c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 91 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 92 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 93 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 94 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 95 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 96 [select]:
cmd/go/internal/work.(*Builder).Do.func2(0x144200ca7b0, 0x144202a60a0, 0x1442019a9a0)
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:154 +0x10c
created by cmd/go/internal/work.(*Builder).Do
	/usr/lib/go-1.10/src/cmd/go/internal/work/exec.go:151 +0x34c

goroutine 54 [IO wait]:
internal/poll.runtime_pollWait(0x402b252ea8, 0x72, 0x144203c4000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x144200d01a8, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x144200d01a8, 0x144203c4001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144200d0190, 0x144203c4000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x144200ce028, 0x144203c4000, 0x200, 0x200, 0x144203c4000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x144200ce028, 0x144203c4000, 0x200, 0x200, 0x0, 0x0, 0x1442046a5b8)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x1442010c000, 0x894040, 0x144200ce028, 0x40aad15000, 0x1442010c000, 0x14420069e01)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x1442010c000, 0x894040, 0x144200ce028, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x1442010c000, 0x894040, 0x144200ce028, 0x0, 0x1442019c200, 0x5e7fc4)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x5e7fe8, 0x1)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x14420344000, 0x1442019a080)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 55 [IO wait]:
internal/poll.runtime_pollWait(0x403c3f0c70, 0x72, 0x144204d0600)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x144200d0248, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x144200d0248, 0x144204d0601, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144200d0230, 0x144204d0600, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x144200ce040, 0x144204d0600, 0x200, 0x200, 0x144204d0600, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x144200ce040, 0x144204d0600, 0x200, 0x200, 0x0, 0x0, 0x144203b51b8)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x1442010c150, 0x894040, 0x144200ce040, 0x40aad15000, 0x1442010c150, 0x1442006de01)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x1442010c150, 0x894040, 0x144200ce040, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x1442010c150, 0x894040, 0x144200ce040, 0x0, 0x1442019c200, 0x5e7fc4)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x5e7fe8, 0x1)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x14420344000, 0x1442019a0c0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 98 [IO wait]:
internal/poll.runtime_pollWait(0x402b2528f8, 0x72, 0x14420340619)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x1442016e068, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x1442016e068, 0x14420340601, 0x5e7, 0x5e7)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x1442016e050, 0x14420340619, 0x5e7, 0x5e7, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x14420172010, 0x14420340619, 0x5e7, 0x5e7, 0x14420340600, 0x14420348000, 0x19)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x14420172010, 0x14420340619, 0x5e7, 0x5e7, 0x19, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x14420142000, 0x894040, 0x14420172010, 0x40aad15000, 0x14420142000, 0x144201be601)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x14420142000, 0x894040, 0x14420172010, 0x0, 0x0, 0x0, 0x144201beb80, 0x144201beba0, 0x144201bebc0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x14420142000, 0x894040, 0x14420172010, 0x144201beca0, 0x144201becc0, 0x144201bece0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x144201bee40, 0x144201bee60)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x1442011e000, 0x144203ae0a0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 97 [IO wait]:
internal/poll.runtime_pollWait(0x402b252d08, 0x72, 0x144201a8000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x1442025e568, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x1442025e568, 0x144201a8001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x1442025e550, 0x144201a8000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x1442000e0a0, 0x144201a8000, 0x200, 0x200, 0x144201a8000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x1442000e0a0, 0x144201a8000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x144200f0000, 0x894040, 0x1442000e0a0, 0x40aad15000, 0x144200f0000, 0x1)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x144200f0000, 0x894040, 0x1442000e0a0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x144200f0000, 0x894040, 0x1442000e0a0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144202aa000, 0x1442000c0e0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 99 [IO wait]:
internal/poll.runtime_pollWait(0x403c3f0ee0, 0x72, 0x144202cc000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x1442016e108, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x1442016e108, 0x144202cc001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x1442016e0f0, 0x144202cc000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x14420172028, 0x144202cc000, 0x200, 0x200, 0x144202cc000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x14420172028, 0x144202cc000, 0x200, 0x200, 0x144201cc1e0, 0x144201cc200, 0x144201cc220)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x14420142070, 0x894040, 0x14420172028, 0x40aad15000, 0x14420142070, 0x144201cc301)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x14420142070, 0x894040, 0x14420172028, 0x0, 0x0, 0x0, 0x144201c1f60, 0x144201c1f80, 0x144201c2020)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x14420142070, 0x894040, 0x14420172028, 0x144201c2100, 0x144201c2120, 0x144201c2140)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x144201c2200, 0x144201c2220)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x1442011e000, 0x144203ae0e0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 114 [IO wait]:
internal/poll.runtime_pollWait(0x402b2525b8, 0x72, 0x144201a6000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x1442025e608, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x1442025e608, 0x144201a6001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x1442025e5f0, 0x144201a6000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x1442000e0b8, 0x144201a6000, 0x200, 0x200, 0x144201a6000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x1442000e0b8, 0x144201a6000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x144200f0070, 0x894040, 0x1442000e0b8, 0x40aad15000, 0x144200f0070, 0x1)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x144200f0070, 0x894040, 0x1442000e0b8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x144200f0070, 0x894040, 0x1442000e0b8, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144202aa000, 0x1442000c120)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 41 [IO wait]:
internal/poll.runtime_pollWait(0x402b252f78, 0x72, 0x144204d0000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x144204d20b8, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x144204d20b8, 0x144204d0001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144204d20a0, 0x144204d0000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x1442027c020, 0x144204d0000, 0x200, 0x200, 0x144204d0000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x1442027c020, 0x144204d0000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x14420130000, 0x894040, 0x1442027c020, 0x40aad15000, 0x14420130000, 0x1)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x14420130000, 0x894040, 0x1442027c020, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x14420130000, 0x894040, 0x1442027c020, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144203e6000, 0x14420550080)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 42 [IO wait]:
internal/poll.runtime_pollWait(0x402b252278, 0x72, 0x144204d0800)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x144204d2158, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x144204d2158, 0x144204d0801, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144204d2140, 0x144204d0800, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x1442027c090, 0x144204d0800, 0x200, 0x200, 0x144204d0800, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x1442027c090, 0x144204d0800, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x144201300e0, 0x894040, 0x1442027c090, 0x40aad15000, 0x144201300e0, 0x1)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x144201300e0, 0x894040, 0x1442027c090, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x144201300e0, 0x894040, 0x1442027c090, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144203e6000, 0x144205500c0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 130 [IO wait]:
internal/poll.runtime_pollWait(0x402b253118, 0x72, 0x144203d2000)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x14420282518, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x14420282518, 0x144203d2001, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x14420282500, 0x144203d2000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x14420286030, 0x144203d2000, 0x200, 0x200, 0x144203d2000, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x14420286030, 0x144203d2000, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x1442012a000, 0x894040, 0x14420286030, 0x40aad15000, 0x1442012a000, 0x1)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x1442012a000, 0x894040, 0x14420286030, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x1442012a000, 0x894040, 0x14420286030, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144202c8000, 0x1442037c080)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 131 [IO wait]:
internal/poll.runtime_pollWait(0x403c3f0fb0, 0x72, 0x144204d0c00)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x144202825b8, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x144202825b8, 0x144204d0c01, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x144202825a0, 0x144204d0c00, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x14420286068, 0x144204d0c00, 0x200, 0x200, 0x144204d0c00, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x14420286068, 0x144204d0c00, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x1442012a070, 0x894040, 0x14420286068, 0x40aad15000, 0x1442012a070, 0x1)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x1442012a070, 0x894040, 0x14420286068, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x1442012a070, 0x894040, 0x14420286068, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144202c8000, 0x1442037c0c0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 71 [IO wait]:
internal/poll.runtime_pollWait(0x402b252a98, 0x72, 0x144204d0200)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x14420276388, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x14420276388, 0x144204d0201, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x14420276370, 0x144204d0200, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x144200f6010, 0x144204d0200, 0x200, 0x200, 0x144204d0200, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x144200f6010, 0x144204d0200, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x1442013c000, 0x894040, 0x144200f6010, 0x40aad15000, 0x1442013c000, 0x1)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x1442013c000, 0x894040, 0x144200f6010, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x1442013c000, 0x894040, 0x144200f6010, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144200c0000, 0x144204e4080)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468

goroutine 72 [IO wait]:
internal/poll.runtime_pollWait(0x402b252418, 0x72, 0x144204d0a00)
	/usr/lib/go-1.10/src/runtime/netpoll.go:173 +0x3c
internal/poll.(*pollDesc).wait(0x14420276428, 0x72, 0xffffffffffffff01, 0x894b40, 0xa63de0)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:85 +0xa0
internal/poll.(*pollDesc).waitRead(0x14420276428, 0x144204d0a01, 0x200, 0x200)
	/usr/lib/go-1.10/src/internal/poll/fd_poll_runtime.go:90 +0x30
internal/poll.(*FD).Read(0x14420276410, 0x144204d0a00, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/internal/poll/fd_unix.go:157 +0x138
os.(*File).read(0x144200f6028, 0x144204d0a00, 0x200, 0x200, 0x144204d0a00, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file_unix.go:226 +0x40
os.(*File).Read(0x144200f6028, 0x144204d0a00, 0x200, 0x200, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/os/file.go:107 +0x48
bytes.(*Buffer).ReadFrom(0x1442013c070, 0x894040, 0x144200f6028, 0x40aad15000, 0x1442013c070, 0x1)
	/usr/lib/go-1.10/src/bytes/buffer.go:205 +0x88
io.copyBuffer(0x8937a0, 0x1442013c070, 0x894040, 0x144200f6028, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:386 +0x294
io.Copy(0x8937a0, 0x1442013c070, 0x894040, 0x144200f6028, 0x0, 0x0, 0x0)
	/usr/lib/go-1.10/src/io/io.go:362 +0x44
os/exec.(*Cmd).writerDescriptor.func1(0x0, 0x0)
	/usr/lib/go-1.10/src/os/exec/exec.go:275 +0x40
os/exec.(*Cmd).Start.func1(0x144200c0000, 0x144204e40c0)
	/usr/lib/go-1.10/src/os/exec/exec.go:396 +0x20
created by os/exec.(*Cmd).Start
	/usr/lib/go-1.10/src/os/exec/exec.go:395 +0x468
--8<---------------------------------------------------------------------

Here's what it is:

--8<---------------------------------------------------------------------
ubuntu@qemu:~$ /usr/bin/qemu-aarch64-static --version
qemu-aarch64 version 4.0.91
Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers
ubuntu@qemu:~$ /usr/bin/qemu-aarch64-static /usr/lib/go-1.10/bin/go version
go version go1.10.4 linux/arm64
ubuntu@qemu:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.2 LTS
Release:	18.04
Codename:	bionic
ubuntu@qemu:~$ uname -a
Linux qemu 4.15.0-51-generic #55-Ubuntu SMP Wed May 15 14:27:21 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
ubuntu@qemu:~$ lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              24
On-line CPU(s) list: 0-23
Thread(s) per core:  1
Core(s) per socket:  1
Socket(s):           24
NUMA node(s):        1
Vendor ID:           GenuineIntel
CPU family:          6
Model:               94
Model name:          Intel Core Processor (Skylake, IBRS)
Stepping:            3
CPU MHz:             2194.916
BogoMIPS:            4389.83
Virtualization:      VT-x
Hypervisor vendor:   KVM
Virtualization type: full
L1d cache:           32K
L1i cache:           32K
L2 cache:            4096K
L3 cache:            16384K
NUMA node0 CPU(s):   0-23
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm rdseed adx smap xsaveopt arat
--8<---------------------------------------------------------------------


The 'qemucrash' test case from this bug still crashes as of current head-of-git (4.1 rc1).

The 'qemucrash' test case problem seems to be because we were incorrectly implementing 'sigaltstack' as setting a process-wide signal stack. This is incorrect, as sigaltstack stacks are supposed to be per-thread, and the Go runtime relies on this. I've just sent a patch which seems to me to fix the qemucrash test case, at least:

https://<email address hidden>/


The sigaltstack fix is now in master (commit 5bfce0b74fbd5d530) and at least in my test environment this also fixes the "can't build hello.go reliably" example. So I'm marking this as 'fix committed'. If there are still problems with running Go binaries, these are likely to be independent bugs, so please open fresh LP issues for them.


Note that this fix will be in the upcoming 4.1 release.