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eric/hanging.rb

Created July 12, 2011 22:51
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Hanging regex found by @jnunemaker
Raw
gistfile1.txt
[1 : 0] eric@morizo:/Users/eric > irb
>> regex = /\A(?:%[0-9a-fA-F]{2}|[^%]+)*\z/
=> /\A(?:%[0-9a-fA-F]{2}|[^%]+)*\z/
>> str = "http%3A%2F%2Fwww.google.com%2Furl%3Fsa%3Dt%26source%3Dweb%26cd%3D1%26sqi%3D2%26ved%3D0CCkQFjAA%26url%3Dhttp%253A%252F%252Fnd.edu%252F%26rct%3Dj%"
=> "http%3A%2F%2Fwww.google.com%2Furl%3Fsa%3Dt%26source%3Dweb%26cd%3D1%26sqi%3D2%26ved%3D0CCkQFjAA%26url%3Dhttp%253A%252F%252Fnd.edu%252F%26rct%3Dj%"
>> regex =~ str
Raw
hanging.rb
# From https://github.com/rack/rack/blob/a50dda57c1426b6b38ed06fa08cab154285c8057/lib/rack/backports/uri/common.rb#L61
regex = /\A(?:%[0-9a-fA-F]{2}|[^%]+)*\z/
str = "http%3A%2F%2Fwww.google.com%2Furl%3Fsa%3Dt%26source%3Dweb%26cd%3D1%26sqi%3D2%26ved%3D0CCkQFjAA%26url%3Dhttp%253A%252F%252Fnd.edu%252F%26rct%3Dj%"
# This hangs for:
# - ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0]
# - ruby 1.8.7 (2011-02-18 patchlevel 334) [x86_64-linux], MBARI 0x6770, Ruby Enterprise Edition 2011.02
regex =~ str
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