Bug 4635 – to!string fails for Variant and structs with uninitalized ("=void") static arrays

Repro: struct S { ubyte[1] raw = void; } static assert(is(typeof(S.init)));//fails std/conv.d, line 256: T to(T, S)(S s) if (is(S == struct) && isSomeString!(T) && is(typeof(&S.init.toString))) The last part is(typeof(&S.init.toString)) cannot be evaluated for structs which have unitialized static arrays. This is true for std.variant.Variant. (This might be a compiler bug, I'm not sure.) I've fixed it by removing the ".init" on std/conv.d line 257 and 274. With this change Variant can be directly printed, since to!string will detect the toString member function.

Seems to work in 2.053: import std.conv; import std.stdio; struct S { ubyte[1] raw = void; } static assert(is(typeof(S.init))); // ok void main() { S s; writeln(to!string(s)); } // ok Marking as fixed.