[INFO] cloning repository https://github.com/xjohnwu/02-simple-redis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xjohnwu/02-simple-redis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxjohnwu%2F02-simple-redis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxjohnwu%2F02-simple-redis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5580cfc64e56e6a50889af7c2265683bfc460d46
[INFO] checking xjohnwu/02-simple-redis against master#75530e9f72a1990ed2305e16fd51d02f47048f12 for pr-135899
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxjohnwu%2F02-simple-redis" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] error: unable to write symref for HEAD: No space left on device


failed to checkout https://github.com/xjohnwu/02-simple-redis

Caused by:
    command failed: exit status: 1