[INFO] fetching crate easy_linked_list 0.1.4...
[INFO] checking easy_linked_list-0.1.4 against try#24cd45d7714ba43afd4b8e62fb677b069b21c4a5 for pr-129543
[INFO] extracting crate easy_linked_list 0.1.4 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate easy_linked_list 0.1.4 on toolchain 24cd45d7714ba43afd4b8e62fb677b069b21c4a5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate easy_linked_list 0.1.4
[INFO] finished tweaking crates.io crate easy_linked_list 0.1.4
[INFO] tweaked toml for crates.io crate easy_linked_list 0.1.4 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4a9a65ec3d42dbaeb46c1b405c794b726c2850ea567c3d67d508c58586a88187
[INFO] running `Command { std: "docker" "start" "-a" "4a9a65ec3d42dbaeb46c1b405c794b726c2850ea567c3d67d508c58586a88187", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a9a65ec3d42dbaeb46c1b405c794b726c2850ea567c3d67d508c58586a88187", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a9a65ec3d42dbaeb46c1b405c794b726c2850ea567c3d67d508c58586a88187", kill_on_drop: false }`
[INFO] [stdout] 4a9a65ec3d42dbaeb46c1b405c794b726c2850ea567c3d67d508c58586a88187
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c15faa5b0e76f768ea35b2465d59e4097c23b54549eed3a221ffebe7f0316e9
[INFO] running `Command { std: "docker" "start" "-a" "7c15faa5b0e76f768ea35b2465d59e4097c23b54549eed3a221ffebe7f0316e9", kill_on_drop: false }`
[INFO] [stderr]     Checking easy_linked_list v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> tests/tests.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     /// i32 example
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 35 |     list.add(1);
[INFO] [stdout]    |     ----------- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]   --> tests/tests.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     struct Person {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 12 |         name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 13 |         age: i32,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `clear` is never used
[INFO] [stdout]    --> tests/Linked_List/mod.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 48  | impl<T> List<T> {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 101 |     pub fn clear(&mut self) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `Linked_List` should have a snake case name
[INFO] [stdout]  --> tests/tests.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | mod Linked_List;
[INFO] [stdout]   |     ^^^^^^^^^^^ help: convert the identifier to snake case: `linked_list`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "7c15faa5b0e76f768ea35b2465d59e4097c23b54549eed3a221ffebe7f0316e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c15faa5b0e76f768ea35b2465d59e4097c23b54549eed3a221ffebe7f0316e9", kill_on_drop: false }`
[INFO] [stdout] 7c15faa5b0e76f768ea35b2465d59e4097c23b54549eed3a221ffebe7f0316e9