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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/106568] -freorder-blocks-algorithm appears to
 causes a crash in stable code, no way to disable it
Date: Mon, 08 Aug 2022 22:00:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106568

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>And the program does not take the exception path. Instead it segfaults.

If I read the backtrace correctly, it is trying to resume an unwind because=
 it
didn't find a catch that would hit in main but the following code hits the
assert while unwinding:
  /* Choose between continuing to process _Unwind_RaiseException
     or _Unwind_ForcedUnwind.  */
  if (exc->private_1 =3D=3D 0)
    code =3D _Unwind_RaiseException_Phase2 (exc, &cur_context, &frames);
  else
    code =3D _Unwind_ForcedUnwind_Phase2 (exc, &cur_context, &frames);

  gcc_assert (code =3D=3D _URC_INSTALL_CONTEXT);

And then abort calls raise which then segfaults.=