[INFO] cloning repository https://github.com/ruuderie/cryptographic-engineering [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ruuderie/cryptographic-engineering" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruuderie%2Fcryptographic-engineering", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruuderie%2Fcryptographic-engineering'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] f6ba458bb5c543837a62e6e6d8698b0dd67532dc [INFO] checking ruuderie/cryptographic-engineering against master#ecb170afc878648c3ae355dbd596c8e4b6f7ebdc for pr-139022 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruuderie%2Fcryptographic-engineering" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'... [INFO] [stderr] done. [INFO] [stderr] fatal: update_ref failed for ref 'HEAD': cannot update ref 'refs/heads/master': couldn't write '/workspace/builds/worker-1-tc1/source/.git/refs/heads/master.lock' failed to checkout https://github.com/ruuderie/cryptographic-engineering Caused by: command failed: exit status: 128