[INFO] cloning repository https://github.com/mihnita/learning_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mihnita/learning_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihnita%2Flearning_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihnita%2Flearning_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a9960c046489f8c4d1f9cddaab371847dc56299
[INFO] checking mihnita/learning_rust against master#8a65ee08296b36342bf7c3cdc15312ccbc357227 for pr-142704
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmihnita%2Flearning_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mihnita/learning_rust on toolchain 8a65ee08296b36342bf7c3cdc15312ccbc357227
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mihnita/learning_rust
[INFO] finished tweaking git repo https://github.com/mihnita/learning_rust
[INFO] tweaked toml for git repo https://github.com/mihnita/learning_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mihnita/learning_rust 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" "+8a65ee08296b36342bf7c3cdc15312ccbc357227" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: failed to parse lock file at: /workspace/builds/worker-4-tc1/source/Cargo.lock
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   TOML parse error at line 66, column 1
[INFO] [stderr]      |
[INFO] [stderr]   66 | <<<<<<< HEAD
[INFO] [stderr]      | ^
[INFO] [stderr]   invalid key


command failed: exit status: 101

error: failed to parse lock file at: /workspace/builds/worker-4-tc1/source/Cargo.lock

Caused by:
  TOML parse error at line 66, column 1
     |
  66 | <<<<<<< HEAD
     | ^
  invalid key