parse.y: fix invalid keyword argument

* parse.y (f_label, f_kw, formal_argument_gen): ignore invalid
  formal argument in keyword argument definition.
  [ruby-dev:48742] [Bug #10545]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48583 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 00e21606c6..d36cbb0638 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -530,6 +530,12 @@ eom
     assert_syntax_error(code, /def n "\u{2208}"; end/, bug10114)
   end
 
+  def test_bad_kwarg
+    bug10545 = '[ruby-dev:48742] [Bug #10545]'
+    src = 'def foo(A: a) end'
+    assert_syntax_error(src, /formal argument/, bug10545)
+  end
+
   private
 
   def not_label(x) @result = x; @not_label ||= nil end