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* regcomp.c (noname_disable_map): don't optimize out group 0

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Ruby's Regexp doesn't allow normal numbered groups if the regexp
  has named groups. On such case it optimizes out related NT_ENCLOSE.
  But even on the case it can use \g<0>.
  This fix not to remove NT_ENCLOSE whose regnum is 0.
  [ruby-core:75828] [Bug #12454]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55562 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse 2016-07-01 19:37:43 +00:00
parent 3418a277d8
commit 1e3fc7dcfa
3 changed files with 13 additions and 4 deletions
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test/ruby/test_regexp.rb
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@ -441,6 +441,7 @@ class TestRegexp < Test::Unit::TestCase
assert_raise(RegexpError) { Regexp.new(")(") }
assert_raise(RegexpError) { Regexp.new('[\\40000000000') }
assert_raise(RegexpError) { Regexp.new('[\\600000000000.') }
assert_raise(RegexpError) { Regexp.new("((?<v>))\\g<0>") }
end
def test_unescape