[INFO] cloning repository https://github.com/saikrir/llist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/saikrir/llist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaikrir%2Fllist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaikrir%2Fllist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c6479a98c2621d3216f61ceb4e8bb5685ef76978
[INFO] checking saikrir/llist against try#8ac0915e346f9a2e49ca3951b642c55bd7d1eaab for pr-158447
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaikrir%2Fllist" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/saikrir/llist
[INFO] finished tweaking git repo https://github.com/saikrir/llist
[INFO] tweaked toml for git repo https://github.com/saikrir/llist written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/saikrir/llist on toolchain 8ac0915e346f9a2e49ca3951b642c55bd7d1eaab
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/saikrir/llist 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" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "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-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5e1e5df1c01f6a2689fb09a204dbf3580dcc771d19f6209a3ae431e8c771d0d3
[INFO] running `Command { std: "docker" "start" "5e1e5df1c01f6a2689fb09a204dbf3580dcc771d19f6209a3ae431e8c771d0d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5e1e5df1c01f6a2689fb09a204dbf3580dcc771d19f6209a3ae431e8c771d0d3" "/opt/rustwide/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e1e5df1c01f6a2689fb09a204dbf3580dcc771d19f6209a3ae431e8c771d0d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5e1e5df1c01f6a2689fb09a204dbf3580dcc771d19f6209a3ae431e8c771d0d3" "/opt/rustwide/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking llist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `ListIter` is never constructed
[INFO] [stdout]  --> src/boxed.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct ListIter<'a, T: PartialEq + Debug> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `peek`, `peek_mut`, and `iter` are never used
[INFO] [stdout]   --> src/boxed.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl<T: PartialEq + Debug> LinkedList<T> {
[INFO] [stdout]    | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 88 |     pub fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     pub fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |     pub fn iter(&self) -> ListIter<'_, T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/refed.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Node<T: PartialEq + Debug> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedList` is never constructed
[INFO] [stdout]   --> src/refed.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct LinkedList<T: PartialEq + Debug> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, and `tail` are never used
[INFO] [stdout]   --> src/refed.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T: PartialEq + Debug> LinkedList<T> {
[INFO] [stdout]    | ---------------------------------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn prepend(&self, val: T) -> Self {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn tail(&self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ListIter` is never constructed
[INFO] [stdout]  --> src/boxed.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct ListIter<'a, T: PartialEq + Debug> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `peek`, `peek_mut`, and `iter` are never used
[INFO] [stdout]   --> src/boxed.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl<T: PartialEq + Debug> LinkedList<T> {
[INFO] [stdout]    | ---------------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 88 |     pub fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     pub fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |     pub fn iter(&self) -> ListIter<'_, T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/refed.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Node<T: PartialEq + Debug> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedList` is never constructed
[INFO] [stdout]   --> src/refed.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct LinkedList<T: PartialEq + Debug> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, and `tail` are never used
[INFO] [stdout]   --> src/refed.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T: PartialEq + Debug> LinkedList<T> {
[INFO] [stdout]    | ---------------------------------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn prepend(&self, val: T) -> Self {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn tail(&self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "5e1e5df1c01f6a2689fb09a204dbf3580dcc771d19f6209a3ae431e8c771d0d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e1e5df1c01f6a2689fb09a204dbf3580dcc771d19f6209a3ae431e8c771d0d3", kill_on_drop: false }`
[INFO] [stdout] 5e1e5df1c01f6a2689fb09a204dbf3580dcc771d19f6209a3ae431e8c771d0d3
