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

[Christian Ehrhardt ]

Bisect step #1 - Expected to ICE and indeed does so.

gcc-20200507.tar.xz

/root/qemu-5.0/linux-user/syscall.c: In function ‘do_syscall1.constprop’:
/root/qemu-5.0/linux-user/syscall.c:12479:1: internal compiler error: Segmentation fault
12479 | }
      | ^

0x5518cb crash_signal
	../../gcc/gcc/toplev.c:328
0x51299f extract_plus_operands
	../../gcc/gcc/rtlanal.c:6314
0x51299f extract_plus_operands
	../../gcc/gcc/rtlanal.c:6317
0x5185d1 decompose_normal_address
	../../gcc/gcc/rtlanal.c:6366
0x5185d1 decompose_address(address_info*, rtx_def**, machine_mode, unsigned char, rtx_code)
	../../gcc/gcc/rtlanal.c:6467
0x51892f decompose_mem_address(address_info*, rtx_def*)
	../../gcc/gcc/rtlanal.c:6486
0x44822f process_address_1
	../../gcc/gcc/lra-constraints.c:3367
0x449803 process_address
	../../gcc/gcc/lra-constraints.c:3641
0x449803 curr_insn_transform
	../../gcc/gcc/lra-constraints.c:3956
0x44cfd5 lra_constraints(bool)
	../../gcc/gcc/lra-constraints.c:5029
0x440653 lra(_IO_FILE*)
	../../gcc/gcc/lra.c:2440
0x411f05 do_reload
	../../gcc/gcc/ira.c:5523
0x411f05 execute
	../../gcc/gcc/ira.c:5709

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to gcc-10 in Ubuntu.
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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/groovy/+bug/1890435/+subscriptions