If the output would be exceptionally long, $regsubex simply returns its unchanged input instead of giving an error. This leads to incorrect output in code that uses $regsubex.
Code:
alias binencode echo 6 -a * In binary: $regsubex($1-, /(.)/g, $base($asc(\t), 10, 2, 8))

Code:
//binencode $str(a, 116) | binencode $str(a, 119) | binencode $str(a, 117)