[Bug c++/99063] [9/10/11 Regression] ICE in prep_operand, at cp/call.c:5842

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99063

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

https://gcc.gnu.org/g:f0da1c0cb7661ee9111bc475efddae80a026de34

commit r11-7192-gf0da1c0cb7661ee9111bc475efddae80a026de34
Author: Marek Polacek <polacek@redhat.com>
Date:   Wed Feb 10 22:51:30 2021 -0500

    c++: ICE with unexpanded pack in do-while [PR99063]

    Here an unexpanded parameter pack snuck into prep_operand which doesn't
    expect to see an operand without a type, and since r247842
    NONTYPE_ARGUMENT_PACK doesn't have a type anymore.

    This only happens with the do-while loop whose condition may not
    contain a declaration so we never called finish_cond which checks
    for unexpanded parameter packs.  So use check_for_bare_parameter_packs
    to remedy that.

    gcc/cp/ChangeLog:

            PR c++/99063
            * semantics.c (finish_do_stmt): Check for unexpanded parameter
packs.

    gcc/testsuite/ChangeLog:

            PR c++/99063
            * g++.dg/cpp0x/variadic-crash6.C: New test.