postprocessing analyze is running into an anlyze-specific issue

[jonathanmetzman]

Traceback (most recent call last):
  File "/mnt/scratch0/clusterfuzz/src/python/bot/startup/run_bot.py", line 146, in task_loop
    commands.process_command(task)
  File "/mnt/scratch0/clusterfuzz/src/clusterfuzz/_internal/bot/tasks/commands.py", line 248, in process_command
    return process_command_impl(task.command, task.argument, task.job,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/mnt/scratch0/clusterfuzz/src/clusterfuzz/_internal/bot/tasks/commands.py", line 159, in wrapper
    return func(task_name, task_argument, job_name, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/mnt/scratch0/clusterfuzz/src/clusterfuzz/_internal/bot/tasks/commands.py", line 434, in process_command_impl
    return run_command(task_name, task_argument, job_name, uworker_env,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/mnt/scratch0/clusterfuzz/src/clusterfuzz/_internal/bot/tasks/commands.py", line 218, in run_command
    result = task.execute(task_argument, job_name, uworker_env)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/mnt/scratch0/clusterfuzz/src/clusterfuzz/_internal/bot/tasks/task_types.py", line 173, in execute
    utasks.tworker_postprocess(input_path)
  File "/mnt/scratch0/clusterfuzz/src/clusterfuzz/_internal/bot/tasks/utasks/__init__.py", line 341, in tworker_postprocess
    utask_module.utask_postprocess(uworker_output)
  File "/mnt/scratch0/clusterfuzz/src/clusterfuzz/_internal/bot/tasks/utasks/analyze_task.py", line 571, in utask_postprocess
    _add_default_issue_metadata(testcase, json.loads(output.issue_metadata))
  File "/mnt/scratch0/clusterfuzz/src/clusterfuzz/_internal/bot/tasks/utasks/analyze_task.py", line 45, in _add_default_issue_metadata
    for key, default_value in fuzz_target_metadata.items():
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'items'