[Bug c++/105386] [11 Regression] Tuple in unevaluated context is instantiated; creates reference to void

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105386

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Patrick Palka
<ppa...@gcc.gnu.org>:

https://gcc.gnu.org/g:8969d00bf16a8f4de79306010fca8f14f91c171d

commit r11-9947-g8969d00bf16a8f4de79306010fca8f14f91c171d
Author: Patrick Palka <ppa...@redhat.com>
Date:   Tue Apr 26 10:53:38 2022 -0400

    c++: decltype of non-dependent call of class type [PR105386]

    We need to pass tf_decltype when instantiating a non-dependent decltype
    operand, like tsubst does in the dependent case, so that we don't force
    completion of a prvalue operand's class type.

            PR c++/105386

    gcc/cp/ChangeLog:

            * semantics.c (finish_decltype_type): Pass tf_decltype to
            instantiate_non_dependent_expr_sfinae.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp0x/decltype81.C: New test.

    (cherry picked from commit b6a48401da51e9042b6f0822d532b3b472492658)