[Bug 1890435] Re: gcc-10 breaks on armhf (flaky): internal compiler error: Segmentation fault

[Christian Ehrhardt ]

On this re-check r10-4054 had 7 complete runs without a fail.
So as I was afraid of in comment 71 already, it might have been another much more rare ICE hidden in there as well. Or OTOH we are cursed by some very bad statistical chances :-/.

I'll check r10-6080 next to see if it
a) reproduces an ICE faster
b) will show the same signature we saw more often before

20190425 good
r10-1014
r10-2027 good
r10-2533
r10-3040 good
r10-3220
r10-3400 good
r10-3450
r10-3475
r10-3478
r10-3593
r10-3622
r10-3657 good
r10-3727 good
r10-4054 other kind of bad?
r10-6080 next
20200507 bad

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https://bugs.launchpad.net/bugs/1890435

Title:
  gcc-10 breaks on armhf (flaky): internal compiler error: Segmentation
  fault

Status in Groovy:
  Confirmed
Status in gcc-10 package in Ubuntu:
  Confirmed

Bug description:
  Hi,
  this could be the same as bug 1887557 but as I don't have enough data I'm filing it as individual issue for now.

  I have only seen this happening on armhf so far.
  In 2 of 5 groovy builds of qemu 5.0 this week I have hit the issue, but it is flaky.

  Flakyness:
  1. different file
  first occurrence
  /<<PKGBUILDDIR>>/target/s390x/excp_helper.c:544:1: internal compiler error: Segmentation fault
  second occurrence
  /<<PKGBUILDDIR>>/linux-user/syscall.c:12479:1: internal compiler error: Segmentation fault

  Being so unreliable I can't provide mcuh more yet.
  I filed it mostly for awareness and so that I can be dup'ed onto the right but if there is a better one.

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