[ python-Bugs-1737127 ] re.findall hangs python completely

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Bugs item #1737127, was opened at 2007-06-14 14:05
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Category: Regular Expressions
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Arno Bakker (abakker)
Assigned to: Gustavo Niemeyer (niemeyer)
Summary: re.findall hangs python completely

Initial Comment:

Running a re.findall() on 40 KB of HTML appears to hang python completely. It hogs the CPU (perhaps not unexpected) but other python threads do not continue and pressing Ctrl-C does not trigger a KeyboardInterrupt. Only a SIGQUIT (Ctrl-\) can kill it.

Attached is a small script to illustrate the problem, and the data file that causes it to hang. Using 40 KB of random data does let it get past the first findall. It creates a Thread that should printout hashes continuously, however, as soon as the MainThread hits the findall the printing stops.

Occurs on Python-2.4.4 (direct from www.python.org) and 2.5.1 (2.5.1-0ubuntu1 from Feisty)


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You can respond by visiting: 
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