Re: GNU Parallel Bug Reports Use of uninitialized value $swap_out in pattern match

[Rhys Ulerich]

>> I'm seeing warnings like
>>
>>     Use of uninitialized value $swap_out in pattern match (m//) at
>> /h2/rhys/bin/parallel line 2313.
>>
>> on a command like
>>
>>     ls | parallel echo {}

> Line 2313 should never be run with the above command.
>
> Do you have a profile (~/.parallel/config /etc/parallel/config
> $PARALLEL) that you run with?

I do.  Sorry to have forgotten to include it:

# As many processes as cores
-j+0
# Nice the jobs
--nice=10
# Do not start jobs when the system is swapping
--noswap

Temporarily removing my ~/.parallel/config and re-running 'ls |
parallel echo' fixes the issue.

With no ~/.parallel/config, running 'ls | parallel --noswap echo'
exhibits the issue.  --noswap is the culprit.

> Can you reproduce this on other systems?

I've not been able to, no.

What information can I gather about this particular system that might help?

- Rhys