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string.c: fix scanned substring with \K

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* string.c (scan_once): fix the matched substring with `\K`, the
  beginning of that string may differ from the matched position.
  [ruby-core:86663] [Bug #14707]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63252 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-04-24 12:25:46 +00:00
parent 3471d0f6d6
commit 2c8f16e6c0
2 changed files with 3 additions and 0 deletions
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1
string.c
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@ -9046,6 +9046,7 @@ scan_once(VALUE str, VALUE pat, long *start, int set_backref_str)
else {
match = rb_backref_get();
regs = RMATCH_REGS(match);
pos = BEG(0);
end = END(0);
}
if (pos == end) {

2
test/ruby/test_string.rb
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@ -1542,6 +1542,8 @@ CODE
assert_nil($~)
assert_equal(3, S("hello hello hello").scan("hello".taint).count(&:tainted?))
assert_equal(%w[1 2 3], S("a1 a2 a3").scan(/a\K./))
end
def test_size