compile.c: disallow next in once

* compile.c (iseq_compile_each0): turned dregx context in "once"
  into "guarded" type from "block" type, to disallow `next`,
  `break`, `redo` as well as outside "once".
  [ruby-core:81805] [Bug #13690]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59202 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index b2bd688a77..c4d3d553be 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -478,8 +478,16 @@ WARN
     }
   end
 
+  def test_invalid_break
+    assert_syntax_error("def m; break; end", /Invalid break/)
+    assert_syntax_error('/#{break}/', /Invalid break/)
+    assert_syntax_error('/#{break}/o', /Invalid break/)
+  end
+
   def test_invalid_next
     assert_syntax_error("def m; next; end", /Invalid next/)
+    assert_syntax_error('/#{next}/', /Invalid next/)
+    assert_syntax_error('/#{next}/o', /Invalid next/)
   end
 
   def test_lambda_with_space