[Bug c++/84692] Class template argument deduction ICE for template's member template

[columbo@gmx-topmail.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84692

--- Comment #1 from Robert Haberlach <columbo@gmx-topmail.de> ---
Btw. begin being a friend is irrelevant, it can also be a non-static or static
member.