regparse.c: initialize return values

* regparse.c (parse_char_class): initialize return values before
  depth limit check.  returned values will be freed in callers
  regardless the error.  [ruby-core:79624] [Bug #13234]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57660 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 19 insertions, 0 deletions

diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index a9120149c5..112af60c96 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -1198,6 +1198,25 @@ class TestRegexp < Test::Unit::TestCase
     RUBY
   end
 
+  def test_invalid_free_at_parse_depth_limit_over
+    assert_separately([], "#{<<-"begin;"}\n#{<<-"end;"}")
+    begin;
+      begin
+        require '-test-/regexp'
+      rescue LoadError
+      else
+        bug = '[ruby-core:79624] [Bug #13234]'
+        Bug::Regexp.parse_depth_limit = 10
+        src = "[" * 100
+        3.times do
+          assert_raise_with_message(RegexpError, /parse depth limit over/, bug) do
+            Regexp.new(src)
+          end
+        end
+      end
+    end;
+  end
+
   # This assertion is for porting x2() tests in testpy.py of Onigmo.
   def assert_match_at(re, str, positions, msg = nil)
     re = Regexp.new(re) unless re.is_a?(Regexp)