pyparsing v2.1.2 Release Notes
Release Date: 2016-05-01 // almost 8 years ago-
Fixed bug in _trim_arity when pyparsing code is included in a PyInstaller, reported by maluwa.
🛠 Fixed catastrophic regex backtracking in implementation of the quoted string expressions (dblQuotedString, sglQuotedString, and quotedString). Reported on the pyparsing wiki by webpentest, good catch! (Also tuned up some other expressions susceptible to the same backtracking problem, such as cStyleComment, cppStyleComment, etc.)