[INFO] cloning repository https://github.com/sylvan-lyon/rust-data-structure
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sylvan-lyon/rust-data-structure" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsylvan-lyon%2Frust-data-structure", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsylvan-lyon%2Frust-data-structure'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 594bcc979b7adf307cb2a7b812a81f3a8a5ff81d
[INFO] checking sylvan-lyon/rust-data-structure against eca445e5ae4a6679cc27d3a09106ce245e13a5a6 for pr-162478
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsylvan-lyon%2Frust-data-structure" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sylvan-lyon/rust-data-structure
[INFO] finished tweaking git repo https://github.com/sylvan-lyon/rust-data-structure
[INFO] tweaked toml for git repo https://github.com/sylvan-lyon/rust-data-structure written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sylvan-lyon/rust-data-structure on toolchain eca445e5ae4a6679cc27d3a09106ce245e13a5a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sylvan-lyon/rust-data-structure 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" "+eca445e5ae4a6679cc27d3a09106ce245e13a5a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: binary `cache_miss` should have a kebab-case name
[INFO] [stderr]   |
[INFO] [stderr] 1 | /workspace/builds/worker-0-tc1/source/target/.../cache_miss
[INFO] [stderr]   |                                                  ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: to change the binary name to `cache-miss`, convert the file stem
[INFO] [stderr]   |
[INFO] [stderr] 1 - src/bin/cache_miss.rs
[INFO] [stderr] 1 + src/bin/cache-miss.rs
[INFO] [stderr]   |
[INFO] [stderr] warning: binary `floating_point` should have a kebab-case name
[INFO] [stderr]   |
[INFO] [stderr] 1 | /workspace/builds/worker-0-tc1/source/target/.../floating_point
[INFO] [stderr]   |                                                  ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: to change the binary name to `floating-point`, convert the file stem
[INFO] [stderr]   |
[INFO] [stderr] 1 - src/bin/floating_point.rs
[INFO] [stderr] 1 + src/bin/floating-point.rs
[INFO] [stderr]   |
[INFO] [stderr] warning: `rust-learn` (manifest) generated 2 warnings
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds


overridden task result to prepare-fail:timeout

Caused by:
    0: uncategorized prepare error
    1: no output for 300 seconds