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+id = 1865
+title = "ERROR:../target/s390x/tcg/cc_helper.c:128:cc_calc_addu: assertion failed: (carry_out <= 1)"
+state = "closed"
+created_at = "2023-09-05T12:21:27.362Z"
+closed_at = "2023-11-13T18:06:25.752Z"
+labels = ["accel: TCG", "target: s390x", "workflow::Patch available"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1865"
+host-os = "Fedora 38"
+host-arch = "x86 (AMD)"
+qemu-version = "8.1"
+guest-os = "ClefOS 7.7 (CentOS)"
+guest-arch = "s390x"
+description = """Installation progresses OK, but QEMU asserts during post-installation setup tasks:
+
+Performing post-installation setup tasks
+**
+ERROR:../target/s390x/tcg/cc_helper.c:128:cc_calc_addu: assertion failed: (carry_out <= 1)
+Bail out! ERROR:../target/s390x/tcg/cc_helper.c:128:cc_calc_addu: assertion failed: (carry_out <= 1)
+./install.sh: line 25: 158224 Aborted                 (core dumped) $QEMU/qemu-system-s390x -M s390-ccw-virtio -smp 1 -m 4G 
+-nographic -display none -serial mon:stdio -device virtio-scsi -drive file=$ISO,format=raw,if=none,id=c1 -device scsi-cd,dri
+ve=c1 -hda $DISK -kernel $KERNEL -initrd $INITRD -net nic,model=virtio,netdev=net1 -netdev user,id=net1 -D debug.log"""
+reproduce = """1. Download ClefOS 7.7 ISO from [sinenomine](https://download.sinenomine.net/clefos)
+2. Download Fedora 27 ISO and extract kernel.img and initrd.img, for boot purposes
+3. Boot ClefOS ISO using Fedora kernel/initrd
+4. Go through a minimal install, observe crash during post-installation setup tasks"""
+additional = """See script log and install.sh attached. [install-and-output.zip](/uploads/87eb8484344402ea9c68784f89ea3339/install-and-output.zip)
+
+I have tried QEMU 7.2.5 and 8.1 on my Fedora 38 AMD host.
+
+My goal is to create RHEL7, SLES12, Ubuntu20 (or compatible) VMs for s390x software builds.
+So far only Ubuntu20 has been successful.
+RHEL7 fails due to kernel issues described in QEMU issue 906, so I'm trying ClefOS (CentOS for z) based on a procedure [here](https://www.linuxquestions.org/questions/linux-server-73/install-clefos-7-5-an-open-source-version-of-rhel-7-5-s390x-using-qemu-4175658710/)"""