https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71098
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|WAITING |RESOLVED Resolution|--- |INVALID --- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- I assume you're referring to the conditionally EXPLICIT constructors. That fixed a defect and is supported all the way back to C++11, as per our usual policy.