[Bug c/101285] [11/12/13/14 Regression] ICE: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in c_safe_arg_type_equiv_p, at c/c-typeck.c:5830

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101285

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pins...@gcc.gnu.org>:

https://gcc.gnu.org/g:11e6bcedb41359c69ee790f38b04033d236336a8

commit r14-4727-g11e6bcedb41359c69ee790f38b04033d236336a8
Author: Andrew Pinski <pins...@gmail.com>
Date:   Sat Oct 14 13:18:00 2023 -0700

    Fix ICE due to c_safe_arg_type_equiv_p not checking for error_mark node

    This is a simple error recovery issue when c_safe_arg_type_equiv_p
    was added in r8-5312-gc65e18d3331aa999. The issue is that after
    an error, an argument type (of a function type) might turn
    into an error mark node and c_safe_arg_type_equiv_p was not ready
    for that. So this just adds a check for error operand for its
    arguments before getting the main variant.

    OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

            PR c/101285

    gcc/c/ChangeLog:

            * c-typeck.cc (c_safe_arg_type_equiv_p): Return true for error
            operands early.

    gcc/testsuite/ChangeLog:

            * gcc.dg/pr101285-1.c: New test.