[Bug c++/84920] Better handling of unmatched/ambiguous calls

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84920

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That looks pretty good to me. What does it produce for the operator<< example
in comment 1?