Fix a bug in which we call Reflection::ClearField() on a default message instance.

PiperOrigin-RevId: 539740799
2 years ago · aa2eb83fb8
parent 2fd29b0b73
commit aa2eb83fb8
1 changed files with 1 additions and 0 deletions
--- a/python/google/protobuf/pyext/repeated_scalar_container.cc
+++ b/python/google/protobuf/pyext/repeated_scalar_container.cc
@ -57,6 +57,7 @@ namespace repeated_scalar_container {

 static int InternalAssignRepeatedField(RepeatedScalarContainer* self,
                                       PyObject* list) {
+  cmessage::AssureWritable(self->parent);
  Message* message = self->parent->message;
  message->GetReflection()->ClearField(message, self->parent_field_descriptor);
  for (Py_ssize_t i = 0; i < PyList_GET_SIZE(list); ++i) {