https://issues.dlang.org/show_bug.cgi?id=12656
bearophile_h...@eml.cc changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #5 from bearophile_h...@eml.cc --- (In reply to bearophile_hugs from comment #0) > void main() @nogc { > import std.ascii: toLower, toUpper, isLower, isUpper; > auto c1 = toUpper('a'); > auto c2 = toLower('A'); > auto b1 = isLower('a'); > auto b2 = isUpper('A'); > } Fixed: https://github.com/D-Programming-Language/phobos/commit/82377e5471411daf62acef480fccb5f487fec3ab --