Fix merge conflicts

Author: sergey-miryanov

Objects/typeobject.c

@@ -5781,7 +5781,7 @@ _PyType_LookupStackRefAndVersion(PyTypeObject *type, PyObject *name, _PyStackRef
     // synchronize-with other writing threads by doing an acquire load on the sequence
     while (1) {
         uint32_t sequence = _PySeqLock_BeginRead(&entry->sequence);
-        uint32_t entry_version = _Py_atomic_load_uint32_relaxed(&entry->version);
+        uint32_t entry_version = _Py_atomic_load_uint32_acquire(&entry->version);
         uint32_t type_version = _Py_atomic_load_uint32_acquire(&type->tp_version_tag);
         if (entry_version == type_version &&
             _Py_atomic_load_ptr_relaxed(&entry->name) == name) {
@@ -5828,11 +5828,14 @@ _PyType_LookupStackRefAndVersion(PyTypeObject *type, PyObject *name, _PyStackRef
     int has_version = 0;
     unsigned int assigned_version = 0;
     BEGIN_TYPE_LOCK();
-    res = find_name_in_mro(type, name, &error);
+    // We must assign the version before doing the lookup.  If
+    // find_name_in_mro() blocks and releases the critical section
+    // then the type version can change.
     if (MCACHE_CACHEABLE_NAME(name)) {
         has_version = assign_version_tag(interp, type);
         assigned_version = type->tp_version_tag;
     }
+    res = find_name_in_mro(type, name, &error);
     END_TYPE_LOCK();
 
     /* Only put NULL results into cache if there was no error. */