[INFO] cloning repository https://github.com/sofush/uml
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sofush/uml" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsofush%2Fuml", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsofush%2Fuml'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8046871cf34a84d348a833c3bc8844764f2032b7
[INFO] checking sofush/uml against master#40daf23eeb711dadf140b2536e67e3ff4c999196 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsofush%2Fuml" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sofush/uml on toolchain 40daf23eeb711dadf140b2536e67e3ff4c999196
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sofush/uml
[INFO] finished tweaking git repo https://github.com/sofush/uml
[INFO] tweaked toml for git repo https://github.com/sofush/uml written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sofush/uml already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: failed to parse lock file at: /workspace/builds/worker-0-tc1/source/Cargo.lock
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   package `cfg-if` is specified twice in the lockfile


command failed: exit status: 101

error: failed to parse lock file at: /workspace/builds/worker-0-tc1/source/Cargo.lock

Caused by:
  package `cfg-if` is specified twice in the lockfile