[Bug c/120354] Flexible array union in the middle is not reported by -Wflex-array-member-not-at-end option when flexible array member is not the last one

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120354

--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Qing Zhao <qinz...@gcc.gnu.org>:

https://gcc.gnu.org/g:70418e6c0120cfce33ab69628602dfdadbed683a

commit r16-1018-g70418e6c0120cfce33ab69628602dfdadbed683a
Author: Qing Zhao <qing.z...@oracle.com>
Date:   Thu May 29 15:59:41 2025 +0000

    C: Flex array in union followed by a structure field is not reported
[PR120354]

    There is only one last_field for a structure type, but there might
    be multiple last_fields for a union type, therefore we should ORed
    the result of TYPE_INCLUDES_FLEXARRAY for multiple last_fields of
    a union type.

            PR c/120354

    gcc/c/ChangeLog:

            * c-decl.cc (finish_struct): Or the results for
TYPE_INCLUDES_FLEXARRAY.

    gcc/testsuite/ChangeLog:

            * gcc.dg/pr120354.c: New test.