[INFO] cloning repository https://github.com/toastinthetub/doublylinkedlist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/toastinthetub/doublylinkedlist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoastinthetub%2Fdoublylinkedlist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoastinthetub%2Fdoublylinkedlist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbb6f8f4b84f9e9a978b86d74adc0fe8dd336e05
[INFO] checking toastinthetub/doublylinkedlist against try#fafe42c59556a4233f03dd0d900b575a9afeece8 for pr-143764
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoastinthetub%2Fdoublylinkedlist" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/toastinthetub/doublylinkedlist
[INFO] finished tweaking git repo https://github.com/toastinthetub/doublylinkedlist
[INFO] tweaked toml for git repo https://github.com/toastinthetub/doublylinkedlist written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/toastinthetub/doublylinkedlist on toolchain fafe42c59556a4233f03dd0d900b575a9afeece8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fafe42c59556a4233f03dd0d900b575a9afeece8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/toastinthetub/doublylinkedlist 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" "+fafe42c59556a4233f03dd0d900b575a9afeece8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+fafe42c59556a4233f03dd0d900b575a9afeece8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6f1c0a9b699e7ed86ff34af22e767ea8b70d09739b46850704e382a85a03a8bc
[INFO] running `Command { std: "docker" "start" "-a" "6f1c0a9b699e7ed86ff34af22e767ea8b70d09739b46850704e382a85a03a8bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f1c0a9b699e7ed86ff34af22e767ea8b70d09739b46850704e382a85a03a8bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f1c0a9b699e7ed86ff34af22e767ea8b70d09739b46850704e382a85a03a8bc", kill_on_drop: false }`
[INFO] [stdout] 6f1c0a9b699e7ed86ff34af22e767ea8b70d09739b46850704e382a85a03a8bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+fafe42c59556a4233f03dd0d900b575a9afeece8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5022f33af15dda671559e9dd30cb6527c71d56292ea54147a5d525b78a7f0b01
[INFO] running `Command { std: "docker" "start" "-a" "5022f33af15dda671559e9dd30cb6527c71d56292ea54147a5d525b78a7f0b01", kill_on_drop: false }`
[INFO] [stderr]     Checking doublylinkedlist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `push` is never used
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<T> DoublyLinkedList<T> {
[INFO] [stdout]    | --------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn push(&mut self, data: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `push` is never used
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<T> DoublyLinkedList<T> {
[INFO] [stdout]    | --------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn push(&mut self, data: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "5022f33af15dda671559e9dd30cb6527c71d56292ea54147a5d525b78a7f0b01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5022f33af15dda671559e9dd30cb6527c71d56292ea54147a5d525b78a7f0b01", kill_on_drop: false }`
[INFO] [stdout] 5022f33af15dda671559e9dd30cb6527c71d56292ea54147a5d525b78a7f0b01