[INFO] cloning repository https://github.com/ian-p-cooke/tower-grpc-tls-client-auth-example [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ian-p-cooke/tower-grpc-tls-client-auth-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fian-p-cooke%2Ftower-grpc-tls-client-auth-example", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fian-p-cooke%2Ftower-grpc-tls-client-auth-example'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 8b382660e2335f99687b2698a15c00596d7c1515 [INFO] checking ian-p-cooke/tower-grpc-tls-client-auth-example against master#5337252b9952fdd9482ed6a4add17254e5bd2c40 for pr-138785 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fian-p-cooke%2Ftower-grpc-tls-client-auth-example" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'... [INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-6-tc1/source/.git/config.lock [INFO] [stderr] fatal: could not set 'core.repositoryformatversion' to '0' failed to checkout https://github.com/ian-p-cooke/tower-grpc-tls-client-auth-example Caused by: command failed: exit status: 128