[INFO] cloning repository https://github.com/yuniruyuni/hobby-linked-list
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yuniruyuni/hobby-linked-list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuniruyuni%2Fhobby-linked-list", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuniruyuni%2Fhobby-linked-list'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9fab1fb35b399c0159e4b3a9d3691711e5446a0
[INFO] checking yuniruyuni/hobby-linked-list against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuniruyuni%2Fhobby-linked-list" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yuniruyuni/hobby-linked-list on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yuniruyuni/hobby-linked-list
[INFO] finished tweaking git repo https://github.com/yuniruyuni/hobby-linked-list
[INFO] tweaked toml for git repo https://github.com/yuniruyuni/hobby-linked-list written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/yuniruyuni/hobby-linked-list already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34ecfb6c1dd5d4e7c3f89c818079f42818ed2af53707fc0eec4bda4b12b2582d
[INFO] running `Command { std: "docker" "start" "-a" "34ecfb6c1dd5d4e7c3f89c818079f42818ed2af53707fc0eec4bda4b12b2582d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34ecfb6c1dd5d4e7c3f89c818079f42818ed2af53707fc0eec4bda4b12b2582d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34ecfb6c1dd5d4e7c3f89c818079f42818ed2af53707fc0eec4bda4b12b2582d", kill_on_drop: false }`
[INFO] [stdout] 34ecfb6c1dd5d4e7c3f89c818079f42818ed2af53707fc0eec4bda4b12b2582d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f01961340e840b6ed1b6b7996e38c73aa6f96976c5dfd1762c356f80ed92b172
[INFO] running `Command { std: "docker" "start" "-a" "f01961340e840b6ed1b6b7996e38c73aa6f96976c5dfd1762c356f80ed92b172", kill_on_drop: false }`
[INFO] [stderr]     Checking linked-list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `pop_front`
[INFO] [stdout]   --> src/main.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn pop_front(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_back`
[INFO] [stdout]   --> src/main.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn pop_back(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "f01961340e840b6ed1b6b7996e38c73aa6f96976c5dfd1762c356f80ed92b172", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f01961340e840b6ed1b6b7996e38c73aa6f96976c5dfd1762c356f80ed92b172", kill_on_drop: false }`
[INFO] [stdout] f01961340e840b6ed1b6b7996e38c73aa6f96976c5dfd1762c356f80ed92b172