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From: "kloczko.tomasz at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/107078] New: LTO is causing that firebird build is core
 dumping
Date: Wed, 28 Sep 2022 21:51:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107078

            Bug ID: 107078
           Summary: LTO is causing that firebird build is core dumping
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kloczko.tomasz at gmail dot com
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

firebird  4.0.2 and gcc-c++ 12.2.1-2 from fedora rawhide.
Build is crashing with sigsegv on execution of the linked binary

Quote from firebird maintainer comment:
"That's almost for sure (99%) pure virtual function call. Usual bug for
dtor/ctor - but I doubt half-constructed node was passed into node
copier. I try to lower compiler optimization level first of all in such
cases (taking into an account that this stuff builds and works OK for
some years)."

More details is in https://github.com/FirebirdSQL/firebird/issues/7308

I found that fedora spec file has disabled LTO as well with comment

# firebird is mis-compiled when LTO is enabled. A root
# cause analysis has not yet been completed. Reported upstream.
# Disable LTO for now=