diff --git a/python/message.c b/python/message.c index 8e418f0d7e..719f8581d8 100644 --- a/python/message.c +++ b/python/message.c @@ -1350,7 +1350,9 @@ PyObject* PyUpb_Message_MergeFromString(PyObject* _self, PyObject* arg) { upb_Decode(buf, size, self->ptr.msg, layout, extreg, options, arena); Py_XDECREF(bytes); if (status != kUpb_DecodeStatus_Ok) { - PyErr_Format(state->decode_error_class, "Error parsing message"); + PyErr_Format(state->decode_error_class, + "Error parsing message with type '%s'", + upb_MessageDef_FullName(msgdef)); return NULL; } PyUpb_Message_SyncSubobjs(self);