New submission from Raphaël Riel <raphael.r...@gmail.com>: re won't raise nor return when working with Runaway Regular Expression. It will compute "almost" indefinitely. Although I'm pretty sure it *may* complete sometime, it's definetly looks like it's stuck.
``` > python -VVVV Python 3.6.2 (default, Aug 23 2017, 14:57:08) [GCC 4.2.1 Compatible Apple LLVM 8.1.0 (clang-802.0.42)] ``` Reproduce with attached file. Should there be a (configurable?) limit on the number of steps involved in the process. Or some warnings and/or hard limit that raises exception? https://pythex.org/ will fail with a HTTP502 BadGateway (server taking too long to respond) https://regex101.com/ python's tester seems to set a limit for this case. I can't say how they managed this. ---------- components: Regular Expressions files: re_backtracking.py messages: 304146 nosy: Raphaël Riel, ezio.melotti, mrabarnett priority: normal severity: normal status: open title: re wont recover nor fail on runaway regular expression type: behavior versions: Python 3.6 Added file: https://bugs.python.org/file47212/re_backtracking.py _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue31759> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
