[Bug c++/90936] [9 Regression] Ambiguous call with ref-qualified conversion operators

[m.cencora at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90936

--- Comment #2 from m.cencora at gmail dot com ---
Hmm, if it is expected, shouldn't gcc also report ambiguous call for f1
construction and assignment as well?