vm_args.c: wrap symbol ifunc

* vm_args.c (args_setup_block_parameter): wrap a symbol in ifunc
  by a proc as a block parameter.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52056 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 0 deletions

diff --git a/test/ruby/test_symbol.rb b/test/ruby/test_symbol.rb
index 3d1f45a927..1329ea22ab 100644
--- a/test/ruby/test_symbol.rb
+++ b/test/ruby/test_symbol.rb
@@ -140,6 +140,13 @@ class TestSymbol < Test::Unit::TestCase
     end;
   end
 
+  def test_to_proc_arg
+    assert_separately([], <<-"end;", timeout: 5.0)
+      def (obj = Object.new).proc(&b) b; end
+      assert_same(:itself.to_proc, obj.proc(&:itself))
+    end;
+  end
+
   def test_call
     o = Object.new
     def o.foo(x, y); x + y; end