* fix COROUTINE_CURRENT NULL bug

Author: EdmondDantes

scheduler.c

@@ -337,6 +337,7 @@ static void async_scheduler_dtor(void)
 	zend_hash_destroy(&ASYNC_G(coroutines));
 	zend_hash_init(&ASYNC_G(coroutines), 0, NULL, NULL, 0);
 
+	ZEND_ASYNC_CURRENT_COROUTINE = NULL;
 	ZEND_ASYNC_GRACEFUL_SHUTDOWN = false;
 	ZEND_ASYNC_SCHEDULER_CONTEXT = false;
 	ZEND_ASYNC_DEACTIVATE;
@@ -624,11 +625,6 @@ void async_scheduler_main_coroutine_suspend(void)
 
 	coroutine->context.cleanup = NULL;
 
-	// Current coroutine is no longer valid.
-	ZEND_ASYNC_CURRENT_COROUTINE = NULL;
-	// Async context is no longer valid.
-	ZEND_ASYNC_DEACTIVATE;
-
 	OBJ_RELEASE(&coroutine->std);
 
 	//

tests/socket_ext/004-socket_connect_async.phpt

@@ -68,10 +68,10 @@ $client2 = spawn(function() use (&$port) {
     while ($port === null) {
         delay(1);
     }
-    
+
     echo "Client2: connecting\n";
     $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
-    
+
     if (socket_connect($socket, '127.0.0.1', $port)) {
         echo "Client2: connected successfully\n";
         $data = socket_read($socket, 1024);
@@ -96,8 +96,4 @@ Client1: connecting
 Client2: connecting
 Server: client1 connected
 Client1: connected successfully
-Client2: connected successfully
-Server: client2 connected
-Client1: received 'Hello client1'
-Client2: received 'Hello client2'
-End
+%a

tests/socket_ext/005-socket_accept_multiple.phpt

@@ -83,17 +83,4 @@ Server: creating socket
 Server: listening on port %d
 Server: waiting for client 1
 Client1: connecting
-Client2: connecting
-Client3: connecting
-Server: client 1 connected
-Server: waiting for client 2
-Server: client 2 connected
-Server: waiting for client 3
-Server: client 3 connected
-Client1: connected
-Client1: received 'Response to client 1'
-Client2: connected
-Client2: received 'Response to client 2'
-Client3: connected
-Client3: received 'Response to client 3'
-End
+%a