[Bug c++/68429] [concepts] ICE in in placeholder_extract_concept_and_args, at cp/constraint.cc:1401

[reichelt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68429

--- Comment #3 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Btw, the code snippet from comment #1 is accepted on trunk.