* insns.def (opt_regexpmatch1): check Regexp#=~ is not defined before

  calling rb_reg_match()

* test/ruby/test_regexp.rb: add test

* vm.c (ruby_vm_redefined_flag): change type to short[]

* vm.c (vm_redefinition_check_flag): return REGEXP_REDEFINED_OP_FLAG if
  klass == rb_cRegexp

* vm.c (vm_init_redefined_flag): setup BOP flag for Regexp#=~

* vm_insnhelper.h: add REGEXP_REDEFINED_OP_FLAG

[ruby-core:57385] [Bug #8953]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43050 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index 7937fe8867..b8c08e38ca 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -1011,6 +1011,18 @@ class TestRegexp < Test::Unit::TestCase
     assert_equal(1, pr4.call(1))
   end
 
+  def test_eq_tilde_can_be_overridden
+    assert_in_out_err([], <<-RUBY, ["foo"], [])
+      class Regexp
+        def =~(str)
+          "foo"
+        end
+      end
+
+      puts // =~ ""
+    RUBY
+  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)