[Bug c++/66487] New: [6 Regression] Firefox segfault with LTO enabled

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66487

            Bug ID: 66487
           Summary: [6 Regression] Firefox segfault with LTO enabled
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Hi.

This if follow-up of PR66163, where I fixed all -fsanitize=null errors and give
another build spin.

Starting from r222135 Firefox built with -flto and -O2 crashed during start-up.
Unfortunately, back-trace looks completely corrupted.

Is there any way I can somehow isolate the issue?

Thanks,
Martin