Also update testcase comment on timeout.

Author: letitz

src/clusterfuzz/_internal/bot/tasks/utasks/minimize_task.py

@@ -573,6 +573,7 @@ def utask_main(uworker_input: uworker_msg_pb2.Input):  # pylint: disable=no-memb
       logs.info('Timed out during main file minimization.')
       return uworker_msg_pb2.Output(  # pylint: disable=no-member
           error_type=uworker_msg_pb2.ErrorType.MINIMIZE_DEADLINE_EXCEEDED,  # pylint: disable=no-member
+          error_message='Timed out during main file minimization.',
           minimize_task_output=minimize_task_output)
 
     logs.info('Minimized main file.')
@@ -593,6 +594,7 @@ def utask_main(uworker_input: uworker_msg_pb2.Input):  # pylint: disable=no-memb
         logs.info('Timed out during file list minimization.')
         return uworker_msg_pb2.Output(  # pylint: disable=no-member
             error_type=uworker_msg_pb2.ErrorType.MINIMIZE_DEADLINE_EXCEEDED,  # pylint: disable=no-member
+          error_message='Timed out during file list minimization.',
             minimize_task_output=minimize_task_output)
       logs.info('Minimized file list.')
     else:
@@ -616,6 +618,7 @@ def utask_main(uworker_input: uworker_msg_pb2.Input):  # pylint: disable=no-memb
           logs.info('Timed out during resources minimization.')
           return uworker_msg_pb2.Output(  # pylint: disable=no-member
               error_type=uworker_msg_pb2.ErrorType.MINIMIZE_DEADLINE_EXCEEDED,  # pylint: disable=no-member
+              error_message='Timed out during resources minimization.',
               minimize_task_output=minimize_task_output)
 
       logs.info('Minimized resources.')
@@ -640,6 +643,7 @@ def utask_main(uworker_input: uworker_msg_pb2.Input):  # pylint: disable=no-memb
       logs.info('Timed out during arguments minimization.')
       return uworker_msg_pb2.Output(  # pylint: disable=no-member
           error_type=uworker_msg_pb2.ErrorType.MINIMIZE_DEADLINE_EXCEEDED,  # pylint: disable=no-member
+          error_message='Timed out during arguments minimization.',
           minimize_task_output=minimize_task_output)
 
     logs.info('Minimized arguments.')
@@ -787,6 +791,8 @@ def handle_minimize_deadline_exceeded(output: uworker_msg_pb2.Output):  # pylint
     _skip_minimization(testcase,
                        'Exceeded minimization deadline too many times.')
   else:
+    data_handler.update_testcase_comment(testcase, data_types.TaskState.WIP,
+                                         output.error_message + ' Retrying.')
     testcase.set_metadata('minimization_deadline_exceeded_attempts',
                           attempts + 1)
     tasks.add_task('minimize', output.uworker_input.testcase_id,