lastNoSuccessVar is a source of mystery

[svalaskevicius]

what is the purpose of lastNoSuccessVar?

I've just had an intensive debugging session trying to figure out why is the parser reviving a harmless parse failure that should have been resolved by the | operator (and indeed it has been). In addition, by showing an irrelevant failure, this variable has hidden the real error just before the end of parser's input.

For now, I've cloned the phrase function to my parser, doing the same just w/o the mutable state to hold false errors, however, should the variable usage be removed from the library or are there any use cases where it is helpful? (and can they be solved in a referentially transparent way?)

[svalaskevicius]

replaced by #108