compile.c, vm_insnhelper.c: flip-flop without hidden string key

* compile.c (iseq_compile_each): count flip-flop state in local iseq
  not in each iseqs, so that the keys can be other than hidden
  strings.  [ruby-core:47253] [Bug #6899]
* vm_insnhelper.c (lep_svar_get, lep_svar_set, vm_getspecial): store
  flip-flop states in an array instead of a hash.
* iseq.c (set_relation): main iseq also can has local scope.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38292 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/ruby/test_flip.rb b/test/ruby/test_flip.rb
new file mode 100644
index 0000000000..8d7cdd03ad
--- /dev/null
+++ b/test/ruby/test_flip.rb
@@ -0,0 +1,13 @@
+require 'test/unit'
+require_relative 'envutil'
+
+class TestFlip < Test::Unit::TestCase
+  def test_hidden_key
+    bug6899 = '[ruby-core:47253]'
+    foo = "foor"
+    bar = "bar"
+    assert_nothing_raised(NotImplementedError, bug6899) do
+      2000.times {eval %[(foo..bar) ? 1 : 2]}
+    end
+  end
+end