From 153127e02818154ab6977e9a4a169bb60f8d2f09 Mon Sep 17 00:00:00 2001
From: Daniil Fajnberg <mail@daniil.fajnberg.de>
Date: Wed, 30 Mar 2022 11:47:15 +0200
Subject: [PATCH] lock before gathering meta tasks

---
 src/asyncio_taskpool/pool.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/asyncio_taskpool/pool.py b/src/asyncio_taskpool/pool.py
index 2267c9f..0919593 100644
--- a/src/asyncio_taskpool/pool.py
+++ b/src/asyncio_taskpool/pool.py
@@ -607,6 +607,7 @@ class TaskPool(BaseTaskPool):
         Raises:
             `PoolStillUnlocked`: The pool has not been locked yet.
         """
+        self.lock()
         not_cancelled_meta_tasks = (task for task_set in self._group_meta_tasks_running.values() for task in task_set)
         with suppress(CancelledError):
             await gather(*self._meta_tasks_cancelled, *not_cancelled_meta_tasks, return_exceptions=return_exceptions)