* insns.def (opt_regexpmatch2): Check String#=~ hasn't overridden

  before calling rb_reg_match().

* test/ruby/test_string.rb: Test for above.

* vm.c (vm_init_redefined_flag): Add BOP flag for String#=~

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

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43052 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 4520464105..694d122372 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -2256,6 +2256,18 @@ class TestString < Test::Unit::TestCase
     assert_equal Encoding::UTF_8, a.encoding
     assert_equal Encoding::US_ASCII, b.encoding
   end
+
+  def test_eq_tilde_can_be_overridden
+    assert_in_out_err([], <<-RUBY, ["foo"], [])
+      class String
+        def =~(str)
+          "foo"
+        end
+      end
+
+      puts "" =~ //
+    RUBY
+  end
 end
 
 class TestString2 < TestString