[Bug c/115642] [11/12/13/14/15 Regression] internal compiler error: tree check: expected class 'type', have 'exceptional' (error_mark) in c_expr_sizeof_expr

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115642

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>:

https://gcc.gnu.org/g:0c27eade4754c13a54e265e4305182c95be1e441

commit r15-1952-g0c27eade4754c13a54e265e4305182c95be1e441
Author: Marek Polacek <pola...@redhat.com>
Date:   Tue Jun 25 14:55:08 2024 -0400

    c: ICE with invalid sizeof [PR115642]

    Here we ICE in c_expr_sizeof_expr on an erroneous expr.value.  The
    code checks for expr.value == error_mark_node but here the e_m_n is
    wrapped in a C_MAYBE_CONST_EXPR.  I don't think we should have created
    such a tree, so let's return earlier in c_cast_expr.

            PR c/115642

    gcc/c/ChangeLog:

            * c-typeck.cc (c_cast_expr): Return error_mark_node if build_c_cast
            failed.

    gcc/testsuite/ChangeLog:

            * gcc.dg/noncompile/sizeof-1.c: New test.