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From: "carlosgalvezp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/109712] Segmentation fault in linear_search_fdes
Date: Mon, 05 Jun 2023 20:34:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109712

--- Comment #22 from Carlos Galvez <carlosgalvezp at gmail dot com> ---
Indeed it's an uninitialized read according to valgrind:

=3D=3D15475=3D=3D Use of uninitialised value of size 8
=3D=3D15475=3D=3D    at 0x1E81C2E9: base_from_object (unwind-dw2-fde.c:319)
=3D=3D15475=3D=3D    by 0x1E81C2E9: linear_search_fdes (unwind-dw2-fde.c:97=
5)
=3D=3D15475=3D=3D    by 0x1E81CE50: find_fde_tail (unwind-dw2-fde-dip.c:519)
=3D=3D15475=3D=3D    by 0x1E81CE50: _Unwind_Find_FDE (unwind-dw2-fde-dip.c:=
573)
=3D=3D15475=3D=3D    by 0x1E8184A9: uw_frame_state_for (unwind-dw2.c:1005)
=3D=3D15475=3D=3D    by 0x1E819EFC: _Unwind_RaiseException (unwind.inc:104)
=3D=3D15475=3D=3D    by 0x1E2B8089: __cxa_throw (in
/path/to/gcc/usr/lib64/libstdc++.so.6.0.32)=