That would've happened to fix it, because "error_while_hashing" and "no_password" happen to not be valid password hashes. The right way would've been to have different syntax for hashes and non-hashes; you could've made it so that a hash starts with a '#' and if it doesn't start with a '#', the rest of the string should be ignored.

Or, for backwards compatibility, start non-hash strings with a character which can't appear in a hash, such as '@'. Your examples would then become '@no_password' and '@error_while_hashing'.