[INFO] cloning repository https://github.com/perryqh/ph-data-structures-rs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/perryqh/ph-data-structures-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperryqh%2Fph-data-structures-rs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperryqh%2Fph-data-structures-rs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] bc28ab47baebb2db369abd526079b8847153ab8a [INFO] checking perryqh/ph-data-structures-rs against try#5de9e0e6cf775e94e0de2003f35e183f3f77bfe8 for pr-143808 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperryqh%2Fph-data-structures-rs" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/perryqh/ph-data-structures-rs [INFO] finished tweaking git repo https://github.com/perryqh/ph-data-structures-rs [INFO] tweaked toml for git repo https://github.com/perryqh/ph-data-structures-rs written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/perryqh/ph-data-structures-rs on toolchain 5de9e0e6cf775e94e0de2003f35e183f3f77bfe8 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/perryqh/ph-data-structures-rs 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" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ce833c11e90fbae58b3023ebc53563812e2ad11082a03e133d4d1ec02b98a38d [INFO] running `Command { std: "docker" "start" "-a" "ce833c11e90fbae58b3023ebc53563812e2ad11082a03e133d4d1ec02b98a38d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ce833c11e90fbae58b3023ebc53563812e2ad11082a03e133d4d1ec02b98a38d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ce833c11e90fbae58b3023ebc53563812e2ad11082a03e133d4d1ec02b98a38d", kill_on_drop: false }` [INFO] [stdout] ce833c11e90fbae58b3023ebc53563812e2ad11082a03e133d4d1ec02b98a38d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+5de9e0e6cf775e94e0de2003f35e183f3f77bfe8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] be09ecb58445db1e2adf7a1835176fd9821212c52896c37ae490a7789b334796 [INFO] running `Command { std: "docker" "start" "-a" "be09ecb58445db1e2adf7a1835176fd9821212c52896c37ae490a7789b334796", kill_on_drop: false }` [INFO] [stderr] Checking ph-data-structures v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/linked_list.rs:35:13 [INFO] [stdout] | [INFO] [stdout] 35 | let mut node = self.head.take(); // self.head is now none [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: unused variable: `head` [INFO] [stdout] --> src/lru_cache.rs:57:25 [INFO] [stdout] | [INFO] [stdout] 57 | let head = self.list.pop_front(); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_head` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Tree` is never constructed [INFO] [stdout] --> src/binary_tree.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | struct Tree { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value`, `left`, and `right` are never read [INFO] [stdout] --> src/binary_tree.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 8 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 9 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 10 | left: Option>, [INFO] [stdout] | ^^^^ [INFO] [stdout] 11 | right: Option>, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/binary_tree.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 14 | impl Node { [INFO] [stdout] | --------- associated function in this implementation [INFO] [stdout] 15 | fn new(value: i32) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `insert`, `insert_iterative`, and `insert_recursive` are never used [INFO] [stdout] --> src/binary_tree.rs:31:8 [INFO] [stdout] | [INFO] [stdout] 30 | impl Tree { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 31 | fn new() -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 35 | fn insert(&mut self, value: i32) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 48 | fn insert_iterative(&mut self, value: i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 83 | fn insert_recursive(node: &mut Box, value: i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `LinkedList` is never constructed [INFO] [stdout] --> src/linked_list.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | struct LinkedList { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `next` are never read [INFO] [stdout] --> src/linked_list.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 6 | value: T, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 7 | next: Option>>, [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/linked_list.rs:18:12 [INFO] [stdout] | [INFO] [stdout] 17 | impl Node { [INFO] [stdout] | --------------------- associated function in this implementation [INFO] [stdout] 18 | pub fn new(value: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `push_front`, and `pop_front` are never used [INFO] [stdout] --> src/linked_list.rs:24:12 [INFO] [stdout] | [INFO] [stdout] 23 | impl LinkedList { [INFO] [stdout] | --------------------------- associated items in this implementation [INFO] [stdout] 24 | pub fn new() -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 28 | pub fn push_front(&mut self, value: T) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 34 | pub fn pop_front(&mut self) -> Option { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/linked_list.rs:35:13 [INFO] [stdout] | [INFO] [stdout] 35 | let mut node = self.head.take(); // self.head is now none [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: unused variable: `head` [INFO] [stdout] --> src/lru_cache.rs:57:25 [INFO] [stdout] | [INFO] [stdout] 57 | let head = self.list.pop_front(); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_head` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `insert_iterative` is never used [INFO] [stdout] --> src/binary_tree.rs:48:8 [INFO] [stdout] | [INFO] [stdout] 30 | impl Tree { [INFO] [stdout] | --------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 48 | fn insert_iterative(&mut self, value: i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s [INFO] running `Command { std: "docker" "inspect" "be09ecb58445db1e2adf7a1835176fd9821212c52896c37ae490a7789b334796", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "be09ecb58445db1e2adf7a1835176fd9821212c52896c37ae490a7789b334796", kill_on_drop: false }` [INFO] [stdout] be09ecb58445db1e2adf7a1835176fd9821212c52896c37ae490a7789b334796