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

[Christian Ehrhardt ]

r10-6586 - passed 27 good runs, no fails

Updated Result Overview:
20190425 good
r10-1014
r10-2027 good?4
r10-2533
r10-3040 good?4
r10-3220
r10-3400 good?4
r10-3450
r10-3475
r10-3478
r10-3593
r10-3622
r10-3657 good?5
r10-3727 good?3
r10-4054 other kind of bad - signature different, and rare?
r10-6080 good?10
r10-6586 good?27
r10-7093 bad, but slow to trigger (2 of 19)
20200507 bad bad bad

Signatures:
r10-4054 arm_legitimate_address_p (nonimmediate)
r10-7093 add_regs_to_insn_regno_info (lra)
r10-7093 add_regs_to_insn_regno_info (lra)
20200507 extract_plus_operands (lra)
20200507 avoid_constant_pool_reference (lra)
20200507 add_regs_to_insn_regno_info (lra)
ubu-10.2 add_regs_to_insn_regno_info (lra)
ubu-10.2 avoid_constant_pool_reference (lra)
ubu-10.2 thumb2_legitimate_address_p (lra)
ubu-10.2 add_regs_to_insn_regno_info (lra)

Next I'll run r10-7093 in this new setup.
@Doko - It would be great to have ~6760 be built for the likely next step.

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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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