Fix how api_core.operation populates exception errors (#4231)

Jon Wayne Parrott · web-flow · commit f2767dd13c7a · 2017-10-20T12:48:23.000-07:00
diff --git a/google/api_core/operation.py b/google/api_core/operation.py
@@ -110,7 +110,7 @@ def _set_result_from_operation(self):
             elif self._operation.HasField('error'):
                 exception = exceptions.GoogleAPICallError(
                     self._operation.error.message,
-                    errors=(self._operation.error),
+                    errors=(self._operation.error,),
                     response=self._operation)
                 self.set_exception(exception)
             else:
