Running with gitlab-runner 14.4.0 (4b9e985a)
  on gitedu-runner hYKjWveH
section_start:1644871460:prepare_executor
Preparing the "docker" executor
Using Docker executor with image omalaspinas/c_pandoc:latest ...
Pulling docker image omalaspinas/c_pandoc:latest ...
Using docker image sha256:2cbfba6d2c51113057e8a5e9b4d5f6dcf41bbf6db9e630c718f39d68ed8183e9 for omalaspinas/c_pandoc:latest with digest omalaspinas/c_pandoc@sha256:9a4b98e0ccc20aa848b92f66a645e7ddb057788724ba2e129e3079ebe17dfbe4 ...
section_end:1644871463:prepare_executor
section_start:1644871463:prepare_script
Preparing environment
Running on runner-hykjwveh-project-8990-concurrent-0 via gitedu-runner...
section_end:1644871463:prepare_script
section_start:1644871463:get_sources
Getting source from Git repository
Fetching changes with git depth set to 50...
Reinitialized existing Git repository in /builds/farouq.obaly/isc_physics/.git/
Checking out 1f7dc017 as farouq.obaly-master-patch-90322...

Updating/initializing submodules recursively with git depth set to 50...
Synchronizing submodule url for 'css/tufte-css'
Entering 'css/tufte-css'
Entering 'css/tufte-css'
HEAD is now at e225f3a Merge pull request #149 from tg-x/gh-pages
Entering 'css/tufte-css'
Entering 'css/tufte-css'
section_end:1644871465:get_sources
section_start:1644871465:step_script
Executing "step_script" stage of the job script
Using docker image sha256:2cbfba6d2c51113057e8a5e9b4d5f6dcf41bbf6db9e630c718f39d68ed8183e9 for omalaspinas/c_pandoc:latest with digest omalaspinas/c_pandoc@sha256:9a4b98e0ccc20aa848b92f66a645e7ddb057788724ba2e129e3079ebe17dfbe4 ...
$ eval $(ssh-agent -s)
Agent pid 12
$ echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
Error loading key "(stdin)": invalid format
section_end:1644871465:step_script
section_start:1644871465:cleanup_file_variables
Cleaning up project directory and file based variables
section_end:1644871466:cleanup_file_variables
ERROR: Job failed: exit code 1