[Bug libgcc/110956] [13, 14 regression] gcc_assert is hit at gcc-13.2.0/libgcc/unwind-dw2-fde.c#L291 with some special library

["ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110956

Rainer Orth <ro at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #3 from Rainer Orth <ro at gcc dot gnu.org> ---
(In reply to Thomas Neumann from comment #1)
> The assert says that the code tries to de-register a frame that it did not
> register before or that was deregistered before. If you see that failing you
> might want to add some print statements to
> __register_frame_info_{tables_|}bases  and  __deregister_frame_info_bases.
> But the example that you included in the report does not seem to trigger the
> assert but crashes during unwinding instead? This has to be looked at in a
> debugger.

Given my nightmarish experiences debugging unwinder issues, I guess I'll rather
start with a reghunt to identify when this started.

> I do not have access to Solaris. If you can give me remote access to a
> suitable machine I am willing to debug this, otherwise you must check
> yourself why the crash happens.

There's still no Solaris/x86 box in the cfarm, unfortunately, only
Solaris/SPARC.