[5.0.0] Celery does NOT start with both -D and -E options enabled #6362
Description
Hi,
I've just installed Celery 5.0.0 and noticed that it doesn't start when both -D and -E options enabled:
Only -E options works fine:
$ celery -A sample.celery worker -E
-------------- celery@MacBook-Pro.local v5.0.0 (singularity)
--- ***** -----
-- ******* ---- Darwin-19.6.0-x86_64-i386-64bit 2020-09-24 15:59:59
- *** --- * ---
- ** ---------- [config]
- ** ---------- .> app: sample:0x7fc944afebd0
- ** ---------- .> transport: amqp://guest:**@192.168.0.101:5672//
- ** ---------- .> results: disabled://
- *** --- * --- .> concurrency: 4 (prefork)
-- ******* ---- .> task events: ON
--- ***** -----
-------------- [queues]
.> celery exchange=celery(direct) key=celery
But both -D and -E options doesn't work. It exits with exit code 0 and nothing happens...
$ celery -A sample.celery worker -D -E
Info:
Python 3.7.9
Celery 5.0.0 on macOS 10.15 Catalina.