[INFO] cloning repository https://github.com/e10ulen/rust_mod
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/e10ulen/rust_mod" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fe10ulen%2Frust_mod", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fe10ulen%2Frust_mod'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b49d244cfb29a21f47d91231a4210abe24b2376a
[INFO] checking e10ulen/rust_mod against master#ba412a6e70ac84641be7764d088acabd0eb3fa39 for pr-145457
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fe10ulen%2Frust_mod" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/e10ulen/rust_mod
[INFO] finished tweaking git repo https://github.com/e10ulen/rust_mod
[INFO] tweaked toml for git repo https://github.com/e10ulen/rust_mod written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/e10ulen/rust_mod on toolchain ba412a6e70ac84641be7764d088acabd0eb3fa39
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ba412a6e70ac84641be7764d088acabd0eb3fa39" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/e10ulen/rust_mod 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" "+ba412a6e70ac84641be7764d088acabd0eb3fa39" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+ba412a6e70ac84641be7764d088acabd0eb3fa39" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8b239aea29e4528487a491aa9cec2a27d822bb2a0fa03d4214c8b42634257ea
[INFO] running `Command { std: "docker" "start" "-a" "a8b239aea29e4528487a491aa9cec2a27d822bb2a0fa03d4214c8b42634257ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8b239aea29e4528487a491aa9cec2a27d822bb2a0fa03d4214c8b42634257ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8b239aea29e4528487a491aa9cec2a27d822bb2a0fa03d4214c8b42634257ea", kill_on_drop: false }`
[INFO] [stdout] a8b239aea29e4528487a491aa9cec2a27d822bb2a0fa03d4214c8b42634257ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+ba412a6e70ac84641be7764d088acabd0eb3fa39" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88b367eaa5092a4d83f446d90bdb994dd159913a9efc9323181095158f142b62
[INFO] running `Command { std: "docker" "start" "-a" "88b367eaa5092a4d83f446d90bdb994dd159913a9efc9323181095158f142b62", kill_on_drop: false }`
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `elt`
[INFO] [stdout]   --> src/main.rs:30:29
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn push_back(&mut self, elt: T) {
[INFO] [stdout]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elt`
[INFO] [stdout]   --> src/main.rs:36:30
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn push_front(&mut self, elt: T) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:45:19
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/main.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `wddd` is never read
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct DoublyLinkedList<T> {
[INFO] [stdout]   |        ---------------- field in this struct
[INFO] [stdout] 8 |     wddd:T
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pop_back` and `pop_front` are never used
[INFO] [stdout]   --> src/main.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<T> DoublyLinkedList<T> {
[INFO] [stdout]    | --------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn pop_back(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn pop_front(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elt`
[INFO] [stdout]   --> src/main.rs:30:29
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn push_back(&mut self, elt: T) {
[INFO] [stdout]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elt`
[INFO] [stdout]   --> src/main.rs:36:30
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn push_front(&mut self, elt: T) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:45:19
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/main.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `wddd` is never read
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct DoublyLinkedList<T> {
[INFO] [stdout]   |        ---------------- field in this struct
[INFO] [stdout] 8 |     wddd:T
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pop_back` and `pop_front` are never used
[INFO] [stdout]   --> src/main.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<T> DoublyLinkedList<T> {
[INFO] [stdout]    | --------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn pop_back(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn pop_front(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "88b367eaa5092a4d83f446d90bdb994dd159913a9efc9323181095158f142b62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88b367eaa5092a4d83f446d90bdb994dd159913a9efc9323181095158f142b62", kill_on_drop: false }`
[INFO] [stdout] 88b367eaa5092a4d83f446d90bdb994dd159913a9efc9323181095158f142b62