Backport #2508
closedThe {n} repetition notation issue in Regexp
Description
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There seems to be a bug in Ruby 1.9 regarding Regular Expression:
/(io){1}x/ =~ 'ioiox' # => 2 #fine
/(io){2}x/ =~ 'ioiox' # => nil #should be 0
/(io){2,2}x/ =~ 'ioiox'# => nil #should be 0
#below are correct
/(?:io){2}x/ =~ 'ioiox' # => 0
/(io){2}/ =~ 'ioiox' # => 0
/(io){2,}x/ =~ 'ioiox' # => 0
/(io){,2}x/ =~ 'ioiox' # => 0
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Updated by dblack (David Black) almost 15 years ago
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Hi --
On Sun, 20 Dec 2009, katz bo wrote:
Bug #2508: The {n} repetition notation issue in Regexp
http://redmine.ruby-lang.org/issues/show/2508Author: katz bo
Status: Open, Priority: Normal
Category: core
ruby -v: ruby 1.9.1p376 (2009-12-07 revision 26041) [i686-linux]There seems to be a bug in Ruby 1.9 regarding Regular Expression:
/(io){1}x/ =~ 'ioiox' # => 2 #fine
/(io){2}x/ =~ 'ioiox' # => nil #should be 0
/(io){2,2}x/ =~ 'ioiox'# => nil #should be 0
#below are correct
/(?:io){2}x/ =~ 'ioiox' # => 0
/(io){2}/ =~ 'ioiox' # => 0
/(io){2,}x/ =~ 'ioiox' # => 0
/(io){,2}x/ =~ 'ioiox' # => 0
I would call this a severe bug.
David
--
David A. Black
Senior Developer, Cyrus Innovation Inc.
THE COMPLEAT RUBYIST, Ruby training with Black/Brown/McAnally!
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=end
Updated by naruse (Yui NARUSE) almost 15 years ago
- Status changed from Open to Closed
- % Done changed from 0 to 100
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This issue was solved with changeset r26143.
katz, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.
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Updated by naruse (Yui NARUSE) almost 15 years ago
- Category set to core
- Status changed from Closed to Assigned
- Assignee set to shyouhei (Shyouhei Urabe)
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Updated by naruse (Yui NARUSE) almost 15 years ago
- Assignee changed from shyouhei (Shyouhei Urabe) to yugui (Yuki Sonoda)
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=end
Updated by jeremyevans0 (Jeremy Evans) over 5 years ago
- Description updated (diff)
- Status changed from Assigned to Closed