gh-102336: Ensure CancelIoEx result is not ignored (GH-102347)

fix ignored return value

diff --git a/Modules/_winapi.c b/Modules/_winapi.c
index 8c4c725b9df2564063ec128ecfc683c51f533d2a..eefc2571ee8287d3402d1c503f739f69318af8f0 100644 (file)
--- a/Modules/_winapi.c
+++ b/Modules/_winapi.c
@@ -288,7 +288,7 @@ _winapi_Overlapped_cancel_impl(OverlappedObject *self)
 
     if (self->pending) {
         Py_BEGIN_ALLOW_THREADS
-        CancelIoEx(self->handle, &self->overlapped);
+        res = CancelIoEx(self->handle, &self->overlapped);
         Py_END_ALLOW_THREADS
     }