nobu	2016-12-26 19:00:36 +0900 (Mon, 26 Dec 2016)

  New Revision: 57194

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=57194

  Log:
    vm_eval.c: Symbol#to_proc and instance_exec
    
    * vm_eval.c (yield_under): should evaluate the proc on the first
      argument.  [ruby-core:78839] [Bug #13074]

  Modified files:
    trunk/test/ruby/test_symbol.rb
    trunk/vm_eval.c
Index: vm_eval.c
===================================================================
--- vm_eval.c	(revision 57193)
+++ vm_eval.c	(revision 57194)
@@ -1591,7 +1591,8 @@ yield_under(VALUE under, VALUE self, int https://github.com/ruby/ruby/blob/trunk/vm_eval.c#L1591
 	    block_handler = vm_proc_to_block_handler(VM_BH_TO_PROC(block_handler));
 	    goto again;
 	  case block_handler_type_symbol:
-	    return rb_sym_proc_call(SYM2ID(VM_BH_TO_SYMBOL(block_handler)), 1, &self, VM_BLOCK_HANDLER_NONE);
+	    return rb_sym_proc_call(SYM2ID(VM_BH_TO_SYMBOL(block_handler)),
+				    argc, argv, VM_BLOCK_HANDLER_NONE);
 	}
 
 	new_captured.self = self;
Index: test/ruby/test_symbol.rb
===================================================================
--- test/ruby/test_symbol.rb	(revision 57193)
+++ test/ruby/test_symbol.rb	(revision 57194)
@@ -201,6 +201,12 @@ class TestSymbol < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_symbol.rb#L201
     end;
   end
 
+  def test_to_proc_instance_exec
+    bug = '[ruby-core:78839] [Bug #13074] should evaluate on the argument'
+    assert_equal(2, BasicObject.new.instance_exec(1, &:succ), bug)
+    assert_equal(3, BasicObject.new.instance_exec(1, 2, &:+), bug)
+  end
+
   def test_call
     o = Object.new
     def o.foo(x, y); x + y; end

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