[INFO] cloning repository https://github.com/stephenjayakar/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/stephenjayakar/linked_list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephenjayakar%2Flinked_list", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephenjayakar%2Flinked_list'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3caa5b2c9c0955f8fa2bc2ebb541acf6056bb5f
[INFO] checking stephenjayakar/linked_list against master#c5fbcd35a8217a17f6b63a22217ace06cf8f5f02 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephenjayakar%2Flinked_list" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stephenjayakar/linked_list on toolchain c5fbcd35a8217a17f6b63a22217ace06cf8f5f02
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stephenjayakar/linked_list
[INFO] finished tweaking git repo https://github.com/stephenjayakar/linked_list
[INFO] tweaked toml for git repo https://github.com/stephenjayakar/linked_list written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/stephenjayakar/linked_list already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 011dd6d24723899baf1803cf6f38313eae078579e8a5f00a5197ed2bbcf7cb20
[INFO] running `Command { std: "docker" "start" "-a" "011dd6d24723899baf1803cf6f38313eae078579e8a5f00a5197ed2bbcf7cb20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "011dd6d24723899baf1803cf6f38313eae078579e8a5f00a5197ed2bbcf7cb20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "011dd6d24723899baf1803cf6f38313eae078579e8a5f00a5197ed2bbcf7cb20", kill_on_drop: false }`
[INFO] [stdout] 011dd6d24723899baf1803cf6f38313eae078579e8a5f00a5197ed2bbcf7cb20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 664caaf9fdb2d08e180428d9522e1ba9c67b5b04c9f28b64a987d9ee6eebf331
[INFO] running `Command { std: "docker" "start" "-a" "664caaf9fdb2d08e180428d9522e1ba9c67b5b04c9f28b64a987d9ee6eebf331", kill_on_drop: false }`
[INFO] [stderr]     Checking stephen_ll v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]    --> src/linked_list.rs:167:5
[INFO] [stdout]     |
[INFO] [stdout] 167 | use test::Bencher;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process::Termination`
[INFO] [stdout]    --> src/linked_list.rs:168:5
[INFO] [stdout]     |
[INFO] [stdout] 168 | use std::process::Termination;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `N`
[INFO] [stdout]    --> src/linked_list.rs:169:1
[INFO] [stdout]     |
[INFO] [stdout] 169 | const N: i32 = 10000;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "664caaf9fdb2d08e180428d9522e1ba9c67b5b04c9f28b64a987d9ee6eebf331", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "664caaf9fdb2d08e180428d9522e1ba9c67b5b04c9f28b64a987d9ee6eebf331", kill_on_drop: false }`
[INFO] [stdout] 664caaf9fdb2d08e180428d9522e1ba9c67b5b04c9f28b64a987d9ee6eebf331