ruby正则表达挂起

#Taken from: http://daringfireball.net/2010/07/improved_regex_for_matching_urls
URI_REGEX = /
(                           # Capture 1: entire matched URL
  (?:
    [a-z][w-]+:                # URL protocol and colon
    (?:
      /{1,3}                        # 1-3 slashes
      |                             #   or
      [a-z0-9%]                     # Single letter or digit or '%'
    )
    |                           #   or
    wwwd{0,3}[.]               # "www.","www1.","www2." … "www999."
    |                           #   or
    [a-z0-9.-]+[.][a-z]{2,4}/  # looks like domain name followed by a slash
  )
  (?:                           # One or more:
    [^s()<>]+                      # Run of non-space,non-()&lt;&gt;
    |                               #   or
    (([^s()<>]+|(([^s()<>]+)))*)  # balanced parens,up to 2 levels
  )+
  (?:                           # End with:
    (([^s()<>]+|(([^s()<>]+)))*)  # balanced parens,up to 2 levels
    |                                   #   or
    [^s`!()[]{};:'".,<>???“”‘’]        # not a space or one of these punct chars
  )
)/xi

它适用于99.9％的所有文档,但在遇到文档中的以下标记时总是挂起我的脚本：token =“synsem：local：cat：(subcat：SubMot,adjuncts：Adjs,subj：Subj),“

我使用的是标准的ruby regexp oeprator：token = ~URI_REGEX,我没有收到任何异常或错误消息.

首先,我尝试解决将正则表达式评估封装到Timeout :: timeoutblock中的问题,但这会降低性能.

关于如何解决这个问题的任何其他想法？