[Bug fortran/126816] [17 Regression] gfortran: ICE building pr46884.f since r17-3155 on some machines

"cvs-commit at gcc dot gnu.org via Gcc-bugs" <[email protected]> Tue, 18 Aug 2026 19:02:22 +0000

Newsgroups	gmane.comp.gcc.bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126816

--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jerry DeLisle <[email protected]>:

https://gcc.gnu.org/g:0a59650d1ec84d0e155670ef5ae226e4c59ba748

commit r17-3389-g0a59650d1ec84d0e155670ef5ae226e4c59ba748
Author: Jerry DeLisle <[email protected]>
Date:   Tue Aug 18 09:46:21 2026 -0700

    fortran: [PR126816] Fix use-after-free of charlen from rejected trial

    restore_old_symbol reverted only ts.type/ts.kind when undoing a
    tentative symbol change, leaving ts.u.cl pointing at whatever
    charlen the rejected trial had allocated via gfc_set_default_type.
    Restore the whole typespec instead.

            PR fortran/126816

    gcc/fortran/ChangeLog:

            * symbol.cc (restore_old_symbol): Restore the whole typespec
            instead of just type and kind.