[Bug c++/84918] Better handling of "std::cout >> 42;"

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84918

--- Comment #9 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
For reference, trunk with
-fdiagnostics-set-output=text:experimental-nesting=yes :
  https://godbolt.org/z/8nv36zxqf