[Bug c++/68092] [possibly concepts] ICE: symtab_node::verify failed. Overloaded function by concept requires

[chrisb2244 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68092

--- Comment #1 from Christian Butcher <chrisb2244 at gmail dot com> ---
Will keep working on a (non-compilable) test case. If someone is interested,
can upload full sources for this class