Clear child executors from side exits

Co-authored-by: Brandt Bucher <[email protected]>

Author: Eclips4

Python/optimizer.c

@@ -257,6 +257,10 @@ uop_dealloc(_PyExecutorObject *self) {
     _PyObject_GC_UNTRACK(self);
     assert(self->vm_data.code == NULL);
     unlink_executor(self);
+    for (uint32_t i = 0; i < self->exit_count; i++) {
+        self->exits[i].temperature = initial_unreachable_backoff_counter();
+        Py_CLEAR(self->exits[i].executor);
+    }
 #ifdef _Py_JIT
     _PyJIT_Free(self);
 #endif