zaach/jison — pull request #258 by joelburget (2014-11-03 22:59:25+00:00)
Title: Stop silencing useful information.

The thrown errors didn't hold any useful information and made debugging
impossible.

Before:

Error: Could not parse jison grammar

After:

Error: Parse error on line 86:
... ;expatom = atom '^' nat
--------------------^
Expecting ':', got 'ID'