[INFO] cloning repository https://github.com/vikram-kangotra/stdweb-emscripten-working
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vikram-kangotra/stdweb-emscripten-working" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvikram-kangotra%2Fstdweb-emscripten-working", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvikram-kangotra%2Fstdweb-emscripten-working'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2124d5639c97e7fbfcd8036ac1014ea5b2ea7484
[INFO] checking vikram-kangotra/stdweb-emscripten-working against master#d2eadb7a94ef8c9deb5137695df33cd1fc5aee92 for pr-137268
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvikram-kangotra%2Fstdweb-emscripten-working" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] error: failed to write new configuration file /workspace/builds/worker-4-tc1/source/.git/config.lock
[INFO] [stderr] fatal: could not set 'core.repositoryformatversion' to '0'


failed to checkout https://github.com/vikram-kangotra/stdweb-emscripten-working

Caused by:
    command failed: exit status: 128