[INFO] cloning repository https://github.com/JohnVlBetter/List
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JohnVlBetter/List" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnVlBetter%2FList", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnVlBetter%2FList'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f6670b28761e977e11c38b4ffd9f89e35e91adf
[INFO] checking JohnVlBetter/List/2f6670b28761e977e11c38b4ffd9f89e35e91adf against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJohnVlBetter%2FList" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JohnVlBetter/List on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JohnVlBetter/List
[INFO] finished tweaking git repo https://github.com/JohnVlBetter/List
[INFO] tweaked toml for git repo https://github.com/JohnVlBetter/List written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/JohnVlBetter/List 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae2abae1caf1be7dc29d888e17de2c4d84a889200991e853a7c963a3293ae33b
[INFO] running `Command { std: "docker" "start" "-a" "ae2abae1caf1be7dc29d888e17de2c4d84a889200991e853a7c963a3293ae33b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae2abae1caf1be7dc29d888e17de2c4d84a889200991e853a7c963a3293ae33b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae2abae1caf1be7dc29d888e17de2c4d84a889200991e853a7c963a3293ae33b", kill_on_drop: false }`
[INFO] [stdout] ae2abae1caf1be7dc29d888e17de2c4d84a889200991e853a7c963a3293ae33b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11f076a7cc522b8c4b0a65e4ee1e663f16072e7991eede9fe6ca71fa552a44bb
[INFO] running `Command { std: "docker" "start" "-a" "11f076a7cc522b8c4b0a65e4ee1e663f16072e7991eede9fe6ca71fa552a44bb", kill_on_drop: false }`
[INFO] [stderr]     Checking lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `into_iter` is never used
[INFO] [stdout]   --> src/first.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl<T> List<T>{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 55 |     fn into_iter(self) -> IntoIter<T>{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `iter` is never used
[INFO] [stdout]   --> src/first.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 71 | impl<T> List<T>{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 72 |     fn iter(& self) -> Iter<T>{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `iter_mut` is never used
[INFO] [stdout]   --> src/first.rs:93:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | impl<T> List<T>{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 93 |     fn iter_mut(&mut self) -> IterMut<T>{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `iter` is never used
[INFO] [stdout]   --> src/second.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl<T> List<T>{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 52 |     fn iter(& self) -> Iter<T>{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `into_iter` is never used
[INFO] [stdout]    --> src/third.rs:129:8
[INFO] [stdout]     |
[INFO] [stdout] 128 | impl<T> List<T>{
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 129 |     fn into_iter(self) -> IntoIter<T>{
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "11f076a7cc522b8c4b0a65e4ee1e663f16072e7991eede9fe6ca71fa552a44bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11f076a7cc522b8c4b0a65e4ee1e663f16072e7991eede9fe6ca71fa552a44bb", kill_on_drop: false }`
[INFO] [stdout] 11f076a7cc522b8c4b0a65e4ee1e663f16072e7991eede9fe6ca71fa552a44bb