Bug #5961: regular expression positive look-behind

• Status: Closed
• Assignee: naruse (Yui NARUSE)
• Target version: 1.9.3
• ruby -v: 1.9.3p0

[[e-mail] (Anthony Bourque)]

irb(main):001:0> input = " \t Jeffs "
=> " \t Jeffs "
irb(main):002:0> input.gsub(%r{(?<=\bJeff)(?=s\b)},"'")
SyntaxError: (irb):2: invalid pattern in look-behind: /(?<=\bJeff)(?=s\b)/
from E:/Ruby/Ruby193/bin/irb:12:in `'
irb(main):003:0>

This is a valid regular expression which should produce " \t Jeff's ". It seems to have a problem with the \b in the look-behind.

[naruse (Yui NARUSE)]

• Status changed from Open to Assigned
• Assignee changed from [e-mail] (Anthony Bourque) to naruse (Yui NARUSE)

[naruse (Yui NARUSE)]

• Status changed from Assigned to Closed

Fixed by mergin Onigmo 5.13.1 in Ruby 2.0.