[Bug c++/112365] [12/13/14 Regression] ICE on invalid C++ since r12-3324

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112365

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:0fa32aeaa6da4ef9566d98a6fb541dd7427d7d36

commit r14-5534-g0fa32aeaa6da4ef9566d98a6fb541dd7427d7d36
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Nov 16 17:42:22 2023 +0100

    c++: Fix error recovery ICE [PR112365]

    check_field_decls for DECL_C_BIT_FIELD FIELD_DECLs with error_mark_node
    TREE_TYPE continues early and doesn't call check_bitfield_decl which would
    either set DECL_BIT_FIELD, or clear DECL_C_BIT_FIELD.  So, the following
    testcase ICEs after emitting tons of errors, because
    SET_DECL_FIELD_CXX_ZERO_WIDTH_BIT_FIELD asserts DECL_BIT_FIELD.

    The patch skips that for FIELD_DECLs with error_mark_node, another
    option would be to check DECL_BIT_FIELD in addition to DECL_C_BIT_FIELD.

    2023-11-16  Jakub Jelinek  <jakub@redhat.com>

            PR c++/112365
            * class.cc (layout_class_type): Don't
            SET_DECL_FIELD_CXX_ZERO_WIDTH_BIT_FIELD on FIELD_DECLs with
            error_mark_node type.

            * g++.dg/cpp0x/pr112365.C: New test.