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

[Christian Ehrhardt ]

There was another one in Groovy as of yesterday.
https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4263/+packages
https://launchpadlibrarian.net/497497840/buildlog_ubuntu-groovy-armhf.qemu_1%3A5.0-5ubuntu8~ppa1_BUILDING.txt.gz

...
qapi/qapi-visit-block-core.c: In function ‘visit_type_q_obj_BlockdevOptions_base_members’:
qapi/qapi-visit-block-core.c:6570:1: internal compiler error: Segmentation fault
 6570 | }
      | ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-10/README.Bugs> for instructions.
...
The bug is not reproducible, so it is likely a hardware or OS problem.

So the compiler itself is recognizing that it isn't the source code
(alone) but some awkwardness that is flaky.

It seems qemu builds in groovy hit this in ~1/3 of the builds we do on
armhf - not sure if that is enough for debugging for you?

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

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

Status in gcc-10 package in Ubuntu:
  New

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.

  Flayness:
  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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