https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82745
helge at penne dot no changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|Fails to warn on narrowing |Fails to warn on narrowing |conversion when using |conversion by std::forward |make_unique |(e.g. when calling | |make_unique) --- Comment #1 from helge at penne dot no --- Some further experiments show that the compiler also fails to detect narrowing conversions in calls to std::vector::emplace_back and std::map::emplace. It seems fair to guess that anything that uses perfect forwarding and std::forward is suspect.