Add helpful error message when a program is terminated by a (Unix) signal, such as a segfault

[gmloose]

Fixes #580

[mr-c]

Thanks!

[mr-c]

make format should clean up the linting issue

You can also run tox locally to duplicate what the CI does

[codecov]

Codecov Report

Merging #1569 (b4efd8f) into main (352daf6) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1569      +/-   ##
==========================================
- Coverage   66.08%   66.08%   -0.01%     
==========================================
  Files          91       91              
  Lines       16299    16309      +10     
  Branches     4222     4226       +4     
==========================================
+ Hits        10772    10778       +6     
- Misses       4379     4383       +4     
  Partials     1148     1148              

Impacted Files	Coverage Δ
cwltool/job.py	77.15% <100.00%> (+0.23%)	⬆️
job.py	62.04% <0.00%> (-0.43%)	⬇️

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[gmloose]

make format should clean up the linting issue

Done and pushed new commit.

[gmloose]

I'm confused by the message from codecov[bot]. How can this small addition cause a drop in coverage of 16.16% and affect over 60 files 😕

[mr-c]

I'm confused by the message from codecov[bot]. How can this small addition cause a drop in coverage of 16.16% and affect over 60 files 😕

It is because the first CI run failed. That comment will update as the CI completes

[mr-c]

The diff coverage is 100.00%.

Congratulations! I'm surprised, though. I didn't know we had a test that is terminated by a POSIX signal