[ConfigProjector] Improve error message.

6 jobs for devel in 9 minutes and 31 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
passed doc-coverage #130461

00:09:30

62.0%
failed format #130462
allowed to fail

00:00:25

passed robotpkg-hpp-core-18.04 #130457

00:02:16

passed robotpkg-hpp-core-20.04 #130458

00:04:25

passed robotpkg-hpp-core-buster #130459

00:02:00

passed robotpkg-hpp-core-ferrum #130460

00:02:13

 
Name Stage Failure
failed
format Test
+ [[ 0 -gt 0 ]]
+ true
+ find . -path ./cmake -prune -o -iregex '.*\.\(h\|c\|hh\|cc\|hpp\|cpp\|hxx\|cxx\)$' -exec clang-format-6.0 -i '{}' +
+ true
+ flake8 .
+ false
+ yapf -ri .
yapf: Input filenames did not match any python files
Cleaning up file based variables
ERROR: Job failed: exit code 1