better error message for wrong outputSource

[mr-c]

No description provided.

[codecov]

Codecov Report

Merging #1624 (a0760ed) into main (e42b76f) will increase coverage by 0.00%.
The diff coverage is 0.00%.

❗ Current head a0760ed differs from pull request most recent head 1f4c7f4. Consider uploading reports for the commit 1f4c7f4 to get more accurate results

@@           Coverage Diff           @@
##             main    #1624   +/-   ##
=======================================
  Coverage   66.72%   66.73%           
=======================================
  Files          93       93           
  Lines       16565    16569    +4     
  Branches     4394     4396    +2     
=======================================
+ Hits        11053    11057    +4     
+ Misses       4377     4375    -2     
- Partials     1135     1137    +2     

Impacted Files	Coverage Δ
cwltool/checker.py	85.59% <0.00%> (-0.74%)	⬇️
cwltool/cwltool/checker.py	87.28% <0.00%> (-0.75%)	⬇️
cwltool/cwltool/job.py	62.57% <0.00%> (+0.79%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e42b76f...1f4c7f4. Read the comment docs.