Do not try to shut down if already in executor shut down

Author: bukka

Zend/zend_globals.h

@@ -311,6 +311,7 @@ struct _zend_executor_globals {
 #define EG_FLAGS_IN_SHUTDOWN			(1<<0)
 #define EG_FLAGS_OBJECT_STORE_NO_REUSE	(1<<1)
 #define EG_FLAGS_IN_RESOURCE_SHUTDOWN	(1<<2)
+#define EG_FLAGS_IN_EXECUTOR_SHUTDOWN	(1<<3)
 
 struct _zend_ini_scanner_globals {
 	zend_file_handle *yy_in;

main/main.c

@@ -1846,7 +1846,11 @@ void php_request_shutdown(void *dummy)
 {
 	bool report_memleaks;
 
-	EG(flags) |= EG_FLAGS_IN_SHUTDOWN;
+	if (EG(flags) & EG_FLAGS_IN_EXECUTOR_SHUTDOWN) {
+		return;
+	}
+
+	EG(flags) |= EG_FLAGS_IN_SHUTDOWN | EG_FLAGS_IN_EXECUTOR_SHUTDOWN;
 
 	report_memleaks = PG(report_memleaks);