From 6e5cee2a9ef5c6785498dc3dc3f6885d3fd8731f Mon Sep 17 00:00:00 2001
From: Carl Meyer <carl@oddbird.net>
Date: Tue, 4 Oct 2022 10:12:26 -0700
Subject: [PATCH] Over-engineer the watcher bits check

---
 Objects/dictobject.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 35637d34f0fd06..395b8a77c5fafd 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -5765,11 +5765,12 @@ _PyDict_SendEvent(int watcher_bits,
 {
     PyInterpreterState *interp = _PyInterpreterState_GET();
     for (int i = 0; i < DICT_MAX_WATCHERS; i++) {
-        if (watcher_bits & (1 << i)) {
+        if (watcher_bits & 1) {
             PyDict_WatchCallback cb = (PyDict_WatchCallback)interp->dict_watchers[i];
             if (cb) {
                 cb(event, (PyObject*)mp, key, value);
             }
         }
+        watcher_bits >>= 1;
     }
 }