parse.y: kwarg to method with same name variable

* parse.y (parse_ident): allow keyword arguments just after a
  method where the same name local variable is defined.
  [ruby-core:73816] [Bug#12073]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53835 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Mon Feb 15 15:44:09 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* parse.y (parse_ident): allow keyword arguments just after a
+	  method where the same name local variable is defined.
+	  [ruby-core:73816] [Bug#12073]
+
 Mon Feb 15 14:43:28 2016  Martin Duerst  <duerst@it.aoyama.ac.jp>
 
 	* enc/unicode/case-folding.rb: Added debugging option

parse.y

@@ -8073,7 +8073,7 @@ parse_ident(struct parser_params *parser, int c, int cmd_state)
     ident = tokenize_ident(parser, last_state);
     if (!IS_lex_state_for(last_state, EXPR_DOT|EXPR_FNAME) &&
 	lvar_defined(ident)) {
-	SET_LEX_STATE(EXPR_END);
+	SET_LEX_STATE(EXPR_END|EXPR_LABEL);
     }
     return result;
 }

test/ruby/test_syntax.rb

@@ -360,6 +360,13 @@ WARN
     assert_valid_syntax("{label: <<~DOC\n""DOC\n""}", bug11849)
   end
 
+  def test_cmdarg_kwarg_lvar_clashing_method
+    bug12073 = '[ruby-core:73816] [Bug#12073]'
+    a = 1
+    assert_valid_syntax("a b: 1")
+    assert_valid_syntax("a = 1; a b: 1", bug12073)
+  end
+
   def test_duplicated_arg
     assert_syntax_error("def foo(a, a) end", /duplicated argument name/)
     assert_nothing_raised { def foo(_, _) end }