Fix fiber garbage collection logic and update test expectations

Author: EdmondDantes

Zend/zend_fibers.c

@@ -1282,7 +1282,7 @@ static void zend_fiber_object_destroy(zend_object *object)
 		fiber->coroutine = NULL;
 		coroutine->extended_data = NULL;
 
-		if (ZEND_COROUTINE_IS_FINISHED(coroutine)) {
+		if (ZEND_COROUTINE_IS_FINISHED(coroutine) || false == ZEND_COROUTINE_IS_STARTED(coroutine)) {
 			/*
 			 * If fcall is not NULL, ownership was NOT taken by
 			 * coroutine_entry_point (coroutine did not start execution).
@@ -1317,7 +1317,10 @@ static void zend_fiber_object_destroy(zend_object *object)
 		);
 
 		ZEND_ASYNC_CANCEL(coroutine, exception, true);
-		ZEND_ASYNC_EVENT_RELEASE(&coroutine->event);
+
+		if (ZEND_COROUTINE_IS_STARTED(coroutine)) {
+			ZEND_ASYNC_EVENT_RELEASE(&coroutine->event);
+		}
 
 		return;
 	}