[Bug c++/125423] ICE in tsubst_expr, at cp/pt.cc with C++26 reflection (missing TREE_BINFO handling during lambda tsubst)

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125423

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

https://gcc.gnu.org/g:910901abe03a31c5f234852e224be4c37d08b5d9

commit r17-819-g910901abe03a31c5f234852e224be4c37d08b5d9
Author: Marek Polacek <polacek@redhat.com>
Date:   Tue May 26 13:56:16 2026 -0400

    c++/reflection: ICE when substituting base info [PR125423]

    As tsubst says, we should never be tsubsting a binfo.  So let's
    bail for REFLECT_BASE.

            PR c++/125423

    gcc/cp/ChangeLog:

            * pt.cc (tsubst_expr) <case REFLECT_EXPR>: Don't tsubst
            REFLECT_BASEs.

    gcc/testsuite/ChangeLog:

            * g++.dg/reflect/bases_of6.C: New test.

    Reviewed-by: Jason Merrill <jason@redhat.com>