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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/108109] [ICE] gfortran compilation fails calling
 'free()' with 'malloc(): mismatching next->prev_size (unsorted)'
Date: Wed, 14 Dec 2022 21:10:14 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: ice-on-invalid-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108109

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2022-12-14
             Status|UNCONFIRMED                 |NEW

--- Comment #3 from anlauf at gcc dot gnu.org ---
On my system I don't see glibc complaining, independent of MALLOC_PERTURB_=
=3D,
however, with valgrind I do get an invalid read slightly deeper down, in

=3D=3D21865=3D=3D Invalid read of size 8
=3D=3D21865=3D=3D    at 0x95AD7D: add_dt_to_dt_list (resolve.cc:14470)
=3D=3D21865=3D=3D    by 0x95AD7D: add_dt_to_dt_list (resolve.cc:14464)
=3D=3D21865=3D=3D    by 0x95AD7D: resolve_fl_derived0(gfc_symbol*) [clone .=
part.0]
(resolve.cc:15152)

(Note the line numbers may slightly differ from yours.)

So confirmed.=