https://issues.dlang.org/show_bug.cgi?id=14980
--- Comment #1 from Kenji Hara <k.hara...@gmail.com> --- (In reply to Vladimir Panteleev from comment #0) > On 2.068, getAddressInfo(null) is the same as getAddressInfo(""). On > Windows, this binds to all external interfaces (but not localhost); on > POSIX, this throws. > > Introduced in https://github.com/D-Programming-Language/phobos/pull/3415 This is purely Phobos issue. By PR#3415, tempCtring() behavior is silently changed for the null input. import std.internal.cstring; void main() { const(char[]) str = null; auto res = tempCString(str); assert(res is null); // 2.067 is ok, but 2.068 fails } And in std.socket, the getaddrinfoPointer operation works differently for the null C string vs zero-length non-null C string at least on Win32. That's the cause of the getAddressInfo behavior change. --