Locust will not work, if there is a custom 'run' @task / function

[joerg1985]

Describe the bug

There are some magic methods with common names, like "run".
Creating a @task with those name will totally break locust, see example below.

Expected behavior

Magic methods should use some kind of prefix or not common names to avoid name clashes.

Actual behavior

Locust will not try to rerun the task, the run task is executed only once.

Steps to reproduce

class Dummy(HttpUser):
    @task
    def run(self):
	# a failing test script
        raise RuntimeError("failed to run")

Environment

• OS: Mixed
• Python version: 3.8
• Locust version: 2.2.3
• Locust command line that you ran:
• Locust file contents (anonymized if necessary):

[cyberw]

I agree, it really should be _run.

But because some people might be calling it explicitly and I dont want to break the interface I made a few workarounds. Try them out if you like :) (available in latest dev build in a few minutes...)