merge revision(s) 49517: [Backport #10831]

	* vm_core.h (rb_call_info_kw_arg_struct): make keywords a symbols
	  list to get rid of inadvertent creation by variable keyword
	  arguments.  [ruby-core:68031] [Bug #10831]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@49666 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 21 insertions, 0 deletions

diff --git a/test/-ext-/symbol/test_inadvertent_creation.rb b/test/-ext-/symbol/test_inadvertent_creation.rb
index 9262fc3396..4e7a85fd91 100644
--- a/test/-ext-/symbol/test_inadvertent_creation.rb
+++ b/test/-ext-/symbol/test_inadvertent_creation.rb
@@ -426,5 +426,26 @@ module Test_Symbol
         x.method(:send).call(name.to_sym)
       end
     end
+
+    def test_kwarg_symbol_leak_no_rest
+      foo = -> (arg: 42) {}
+      assert_no_immortal_symbol_created("kwarg no rest") do |name|
+        assert_raise(ArgumentError) { foo.call(name.to_sym => 42) }
+      end
+    end
+
+    def test_kwarg_symbol_leak_with_rest
+      foo = -> (arg: 2, **options) {}
+      assert_no_immortal_symbol_created("kwarg with rest") do |name|
+        foo.call(name.to_sym => 42)
+      end
+    end
+
+    def test_kwarg_symbol_leak_just_rest
+      foo = -> (**options) {}
+      assert_no_immortal_symbol_created("kwarg just rest") do |name|
+        foo.call(name.to_sym => 42)
+      end
+    end
   end
 end