[Bug c++/109247] [13 Regression] optional o; o = {x}; wants to use explicit optional(U) constructor since r13-6765-ga226590fefb35ed6

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109247

--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 54739
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54739&action=edit
possible patch

An implementation of my guess at the clang rule, if we end up wanting to go
that way.