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+performance: 0.525
+semantic: 0.504
+graphic: 0.446
+device: 0.389
+user-level: 0.380
+files: 0.357
+PID: 0.344
+ppc: 0.316
+kernel: 0.300
+architecture: 0.282
+x86: 0.268
+network: 0.267
+hypervisor: 0.258
+VMM: 0.256
+vnc: 0.248
+KVM: 0.247
+socket: 0.234
+virtual: 0.219
+permissions: 0.218
+mistranslation: 0.215
+i386: 0.206
+risc-v: 0.203
+TCG: 0.192
+arm: 0.191
+debug: 0.189
+register: 0.185
+boot: 0.184
+assembly: 0.156
+peripherals: 0.141
+
+qemu-img: Killed by SIGTRAP on check of the fuzzed image
+
+'qemu-img check -r all' was killed by SIGTRAP.
+
+Sequence:
+ 1. Unpack the attached archive, make a copy of test.img
+ 2. Put copy.img and backing_img.qed in the same directory
+ 3. Execute
+
+qemu-img check -f qcow2 -r all copy.img
+
+Result: qemu-img was killed by SIGTRAP with the reason:
+
+(process:2210): GLib-ERROR **: gmem.c:140: failed to allocate 18446744069633940288 bytes
+
+The qemu-img execution log can be found in the attached archive.
+
+qemu.git HEAD 2d591ce2aeebf
+
+
+
+Hi,
+
+This issue has at least been partially fixed in master (5f77ef69a195098baddfdc6d189f1b4a94587378):
+
+$ ./qemu-img check -f qcow2 -r all copy.img
+# ...
+The following inconsistencies were found and repaired:
+
+    0 leaked clusters
+    1 corruptions
+
+Double checking the fixed image now...
+
+469 errors were found on the image.
+Data may be corrupted, or further writes to the image may corrupt it.
+
+4766 internal errors have occurred during the check.
+2459/4434 = 55.46% allocated, 99.31% fragmented, 10.41% compressed clusters
+Image end offset: 2048
+
+As with bug 1355697, I'm still working on the repair function. But this image is broken in a way that there's no real way to fix it. The best we could do is ask the user to use qemu-img convert and then hope for the best. I'll just mark this as fixed.
+
+Max
+