Process completed with exit code 31.

ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636

file=tests/testthat/test-pcd_cmdstan_model.R,line=346,col=11,[object_length_linter] Variable and function names should not be longer than 30 characters.

file=tests/testthat/test-pcd_cmdstan_model.R,line=346,col=72,[brace_linter] Opening curly braces should never go on their own line and should always be followed by a new line.