[INFO] cloning repository https://github.com/IInexerino/bad_linked_lists [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/IInexerino/bad_linked_lists" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIInexerino%2Fbad_linked_lists", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIInexerino%2Fbad_linked_lists'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 77dd12ada322f2cc63fe02d6bfe3e206ce13374b [INFO] checking IInexerino/bad_linked_lists/77dd12ada322f2cc63fe02d6bfe3e206ce13374b against master#d14d202262d13df896b0c624b0cec6e4bfde631a for pr-143028 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIInexerino%2Fbad_linked_lists" "/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/IInexerino/bad_linked_lists [INFO] finished tweaking git repo https://github.com/IInexerino/bad_linked_lists [INFO] tweaked toml for git repo https://github.com/IInexerino/bad_linked_lists written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/IInexerino/bad_linked_lists on toolchain d14d202262d13df896b0c624b0cec6e4bfde631a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/IInexerino/bad_linked_lists 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" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f29795cebedc01f81b42bdea2184a265b243432f953f4cabbba7c6146fcbc54a [INFO] running `Command { std: "docker" "start" "-a" "f29795cebedc01f81b42bdea2184a265b243432f953f4cabbba7c6146fcbc54a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f29795cebedc01f81b42bdea2184a265b243432f953f4cabbba7c6146fcbc54a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f29795cebedc01f81b42bdea2184a265b243432f953f4cabbba7c6146fcbc54a", kill_on_drop: false }` [INFO] [stdout] f29795cebedc01f81b42bdea2184a265b243432f953f4cabbba7c6146fcbc54a [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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9a5454c298464fd80f754e44c3db9c408ca1976b14831bc440b40c6763a31444 [INFO] running `Command { std: "docker" "start" "-a" "9a5454c298464fd80f754e44c3db9c408ca1976b14831bc440b40c6763a31444", kill_on_drop: false }` [INFO] [stderr] Checking bad-linked-list-rs v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `boxed_node` [INFO] [stdout] --> src/second.rs:80:28 [INFO] [stdout] | [INFO] [stdout] 80 | while let Some(mut boxed_node) = cur_link { [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_boxed_node` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/second.rs:80:24 [INFO] [stdout] | [INFO] [stdout] 80 | while let Some(mut boxed_node) = cur_link { [INFO] [stdout] | ----^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `More` is never constructed [INFO] [stdout] --> src/first.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 7 | enum Link { [INFO] [stdout] | ---- variant in this enum [INFO] [stdout] 8 | Empty, [INFO] [stdout] 9 | More(Box), [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/first.rs:24:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl List { [INFO] [stdout] | --------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 24 | fn push(&mut self, element: i32) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/second.rs:72:17 [INFO] [stdout] | [INFO] [stdout] 72 | pub fn iter(& self) -> Iter { [INFO] [stdout] | ^^^^^^ ------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 72 | pub fn iter(& self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `boxed_node` [INFO] [stdout] --> src/second.rs:80:28 [INFO] [stdout] | [INFO] [stdout] 80 | while let Some(mut boxed_node) = cur_link { [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_boxed_node` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/second.rs:80:24 [INFO] [stdout] | [INFO] [stdout] 80 | while let Some(mut boxed_node) = cur_link { [INFO] [stdout] | ----^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/second.rs:72:17 [INFO] [stdout] | [INFO] [stdout] 72 | pub fn iter(& self) -> Iter { [INFO] [stdout] | ^^^^^^ ------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 72 | pub fn iter(& self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s [INFO] running `Command { std: "docker" "inspect" "9a5454c298464fd80f754e44c3db9c408ca1976b14831bc440b40c6763a31444", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9a5454c298464fd80f754e44c3db9c408ca1976b14831bc440b40c6763a31444", kill_on_drop: false }` [INFO] [stdout] 9a5454c298464fd80f754e44c3db9c408ca1976b14831bc440b40c6763a31444