[Bug c/123716] ICE in tree_nop_conversion_p triggered by a conflicting redeclaration that turns an identifier into an array type mid-function.

Sun, 22 Feb 2026 14:34:12 -0800 

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123716

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Roger Sayle <[email protected]>:

https://gcc.gnu.org/g:7bd059e28dde475320ccfa07d94a14c8c65f8073

commit r16-7632-g7bd059e28dde475320ccfa07d94a14c8c65f8073
Author: Roger Sayle <[email protected]>
Date:   Sun Feb 22 22:32:05 2026 +0000

    PR c/123716: Fix an unexpected error_mark_node ICE.

    This patch resolves the P4 regression PR c/123716.

    2026-02-22  Roger Sayle  <[email protected]>

    gcc/ChangeLog
            PR c/123716
            * tree.cc (tree_nop_conversion_p): Move sanity checks on
            inner_type to here...
            (tree_nop_conversion): ... from here.

    gcc/testsuite/ChangeLog
            PR c/123716
            * gcc.dg/pr123716.c: New test case.

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