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

[Christian Ehrhardt ]

I got a ping by Doko (thanks) to try
https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test/+build/20227507

ii  cpp-10                               10.2.0-16ubuntu1.1                armhf        GNU C preprocessor
ii  g++-10                               10.2.0-16ubuntu1.1                armhf        GNU C++ compiler
ii  gcc-10                               10.2.0-16ubuntu1.1                armhf        GNU C compiler
ii  gcc-10-base:armhf                    10.2.0-16ubuntu1.1                armhf        GCC, the GNU Compiler Collection (base package)
ii  libasan6:armhf                       10.2.0-16ubuntu1.1                armhf        AddressSanitizer -- a fast memory error detector
ii  libatomic1:armhf                     10.2.0-16ubuntu1.1                armhf        support library providing __atomic built-in functions
ii  libcc1-0:armhf                       10.2.0-16ubuntu1.1                armhf        GCC cc1 plugin for GDB
ii  libgcc-10-dev:armhf                  10.2.0-16ubuntu1.1                armhf        GCC support library (development files)
ii  libgcc-s1:armhf                      10.2.0-16ubuntu1.1                armhf        GCC support library
ii  libgomp1:armhf                       10.2.0-16ubuntu1.1                armhf        GCC OpenMP (GOMP) support library
ii  libstdc++-10-dev:armhf               10.2.0-16ubuntu1.1                armhf        GNU Standard C++ Library v3 (development files)
ii  libstdc++-10-pic:armhf               10.2.0-16ubuntu1.1                armhf        GNU Standard C++ Library v3 (shared library subset kit)
ii  libstdc++6:armhf                     10.2.0-16ubuntu1.1                armhf        GNU Standard C++ Library v3
ii  libubsan1:armhf                      10.2.0-16ubuntu1.1                armhf        UBSan -- undefined behaviour sanitizer (runtime)


I started my loop with that build and will report back later if that triggered the issue again (or another one).

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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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