https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60027
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |INVALID --- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- That's unfortunate, I much prefer the Clang and EDG behaviour, which is to resolve the ambiguity in favour of the converting constructor. In the Clang bug Ed links to https://wg21.link/cwg1228 So this is INVALID.