[Bug c++/94252] New: Can't use a lambda in a requires expression

[barry.revzin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94252

            Bug ID: 94252
           Summary: Can't use a lambda in a requires expression
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: barry.revzin at gmail dot com
  Target Milestone: ---

This program:

    auto f = []{ return 0; };
    static_assert(requires { f(); });

Fails to compile on trunk (https://godbolt.org/z/DEuoVM), with the error:

<source>:2:15: error: static assertion failed
    2 | static_assert(requires { f(); });
      |               ^~~~~~~~~~~~~~~~~