And this issue makes the following script doesn't work properly.
function script popcount { .@i = getarg(0); .@i -= (.@i >> 1) & 0x55555555; .@i = (.@i & 0x33333333) + ((.@i >> 2) & 0x33333333); .@i = (.@i + (.@i >> 4)) & 0x0F0F0F0F; .@i += .@i >> 8; .@i += .@i >> 16; return .@i & 0x3f; }