TypeError: __init__() missing 1 required positional argument: 'reason'

[TommeyChang]

Traceback (most recent call last):
File "/home/stamp/.local/share/virtualenvs/backend-qOgQL7Z8/lib/python3.7/site-packages/loguru/_handler.py", line 270, in _queued_writer
message = queue.get()
File "/usr/local/sbin/python3.7/lib/python3.7/multiprocessing/queues.py", line 354, in get
return _ForkingPickler.loads(res)
File "/home/stamp/.local/share/virtualenvs/backend-qOgQL7Z8/lib/python3.7/site-packages/loguru/_recattrs.py", line 77, in _from_pickled_value
value = pickle.loads(pickled_value)
TypeError: init() missing 1 required positional argument: 'reason'
--- End of logging error ---

[Delgan]

Hi.

This is likely a problem when enqueue=True due to some logged exception not being (un)picklable. This issue has been reported in #342 and will be fixed in the next release.

If you know where the error is coming from, you can try a workaround like this one:

try:
    faulty_function()
except Exception:
    type, _, tb = sys.exc_info()
    logger.opt(exception=(type, None, tb)).error("An error occurred")

Otherwise, you need to patch the logger like that:

def patcher(record):
    exception = record["exception"]
    if exception is not None:
        fixed = Exception(str(exception.value))
        record["exception"] = exception._replace(value=fixed)

logger.configure(patcher=patcher)

[Delgan]

Closing as this issue has been fixed on master branch.