Properly handle yield during method calls

Zend/tests/generators/yield_during_method_call.phpt

@@ -0,0 +1,35 @@
+--TEST--
+Yield can be used during a method call
+--FILE--
+<?php
+
+class A {
+    public function b($c) {
+        echo $c, "\n";
+    }
+}
+
+function *gen() {
+    $a = new A;
+    $a->b(yield);
+}
+
+$gen = gen();
+$gen->send('foo');
+
+// test resource cleanup
+$gen = gen();
+$gen->rewind();
+$gen->close();
+
+// test cloning
+$g1 = gen();
+$g1->rewind();
+$g2 = clone $g1;
+$g1->close();
+$g2->send('bar');
+
+?>
+--EXPECT--
+foo
+bar

Zend/zend_generators.c

@@ -41,6 +41,10 @@ void zend_generator_close(zend_generator *generator, zend_bool finished_executio
 			zval_ptr_dtor(&execute_data->current_this);
 		}
 
+		if (execute_data->object) {
+			zval_ptr_dtor(&execute_data->object);
+		}
+
 		/* If the generator is closed before it can finish execution (reach
 		 * a return statement) we have to free loop variables manually, as
 		 * we don't know whether the SWITCH_FREE / FREE opcodes have run */
@@ -228,6 +232,10 @@ static void zend_generator_clone_storage(zend_generator *orig, zend_generator **
 			);
 			Z_ADDREF_P(clone->send_target->var.ptr);
 		}
+
+		if (execute_data->object) {
+			Z_ADDREF_P(execute_data->object);
+		}
 	}
 
 	/* The value and key are known not to be references, so simply add refs */