Fix of memory leak in Function.prototype.bind function.

Related issue: #511

JerryScript-DCO-1.0-Signed-off-by: Zsolt Borbély zsborbely.u-szeged@partner.samsung.com

jerry-core/ecma/base/ecma-helpers.cpp

@@ -801,8 +801,13 @@ ecma_free_internal_property (ecma_property_t *property_p) /**< the property */
     case ECMA_INTERNAL_PROPERTY_NON_INSTANTIATED_BUILT_IN_MASK_0_31: /* an integer (bit-mask) */
     case ECMA_INTERNAL_PROPERTY_NON_INSTANTIATED_BUILT_IN_MASK_32_63: /* an integer (bit-mask) */
     case ECMA_INTERNAL_PROPERTY_BOUND_FUNCTION_TARGET_FUNCTION:
+    {
+      break;
+    }
+
     case ECMA_INTERNAL_PROPERTY_BOUND_FUNCTION_BOUND_THIS:
     {
+      ecma_free_value (property_value, false);
       break;
     }
 

tests/jerry/function-prototype-bind.js

@@ -115,6 +115,9 @@ assert (foo == 3);
 assert (foo instanceof Number);
 assert (foo.prototype === undefined);
 
+var func = Number.prototype.toString.bind('foo');
+assert (func instanceof Function);
+
 try {
   var this_obj = this.constructor;
   var bound = this_obj.bind(null, "foo");