https://issues.dlang.org/show_bug.cgi?id=23184 --- Comment #1 from ryuukk_ <ryuukk.dev at gmail.com> --- This line too is problematic: int len = (int)( (sizeof(nk_utfmask)/sizeof(0[nk_utfmask])) / ((size_t)(!(sizeof(nk_utfmask) % sizeof(0[nk_utfmask])))) ); --