[issue846388] Check for signals during regular expression matches

[Ralf Schmitt]

Ralf Schmitt added the comment:

here is an example (from http://swtch.com/~rsc/regexp/regexp1.html)

python -c 'import re; num=25; r=re.compile("a?"*num+"a"*num);
r.match("a"*num)'

At work I have seen a real world case of a regular expression which ran
for minutes rendering the application unresponsive. We would have been
glad to be able to interrupt the regular expression engine and getting a
traceback.

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nosy: +schmir

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