[Bug lto/121588] [13/14/15 regression] gcc 15.2.0 crashes when building u-boot 2022.07 with LTO since r15-7754

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121588

--- Comment #20 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-15 branch has been updated by Michal Jires
<mjires@gcc.gnu.org>:

https://gcc.gnu.org/g:4886dd899bbbcf1da7399e6bdf64cab861f34928

commit r15-10866-g4886dd899bbbcf1da7399e6bdf64cab861f34928
Author: Michal Jires <mjires@suse.cz>
Date:   Fri Dec 19 17:09:16 2025 +0100

    lto: Fix SegFault in ICF caused by missing body

    During LTO symbol merging, weak symbols may be resolved to external
    definition.
    We reset the symbol, so the body might be released in unreachability
    pass. But we didn't mark the symbol with body_removed, so ICF assumed
    the body was still there causing SegFault.

            PR lto/121588

    gcc/lto/ChangeLog:

            * lto-symtab.cc (lto_symtab_merge_symbols): Set body_removed
            for symbols resolved outside of IR.

    gcc/testsuite/ChangeLog:

            * gcc.dg/lto/attr-weakref-2_0.c: New test.
            * gcc.dg/lto/attr-weakref-2_1.c: New test.

    (cherry picked from commit 8e4107a1b3d430f5d3938c8068c6cd512f661e95)