[INFO] cloning repository https://github.com/noamtashma/generic-trees [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/noamtashma/generic-trees" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoamtashma%2Fgeneric-trees", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoamtashma%2Fgeneric-trees'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 7b5eaf917b657a5fcde10ea50d5b0e567033d7f9 [INFO] checking noamtashma/generic-trees against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoamtashma%2Fgeneric-trees" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/noamtashma/generic-trees on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/noamtashma/generic-trees [INFO] finished tweaking git repo https://github.com/noamtashma/generic-trees [INFO] tweaked toml for git repo https://github.com/noamtashma/generic-trees written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/noamtashma/generic-trees already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] e3bda0993abd16476dce9db8ba26681282ea7a966492687834fa4a60b502c29d [INFO] running `Command { std: "docker" "start" "-a" "e3bda0993abd16476dce9db8ba26681282ea7a966492687834fa4a60b502c29d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e3bda0993abd16476dce9db8ba26681282ea7a966492687834fa4a60b502c29d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e3bda0993abd16476dce9db8ba26681282ea7a966492687834fa4a60b502c29d", kill_on_drop: false }` [INFO] [stdout] e3bda0993abd16476dce9db8ba26681282ea7a966492687834fa4a60b502c29d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 546549945a6151c0cf31001ba8cd2c6b713dd092eee4bc8f4788e4b78d99e689 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "546549945a6151c0cf31001ba8cd2c6b713dd092eee4bc8f4788e4b78d99e689", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Compiling derive_destructure v1.0.0 [INFO] [stderr] Checking trees v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `index` [INFO] [stdout] --> src/example.rs:24:30 [INFO] [stdout] | [INFO] [stdout] 24 | fn sum_with_index(&self, index : usize) -> usize { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `index` [INFO] [stdout] --> src/example.rs:28:30 [INFO] [stdout] | [INFO] [stdout] 28 | fn split_at_index(&self, index : usize) -> (Interval, Interval) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `index` [INFO] [stdout] --> src/example.rs:24:30 [INFO] [stdout] | [INFO] [stdout] 24 | fn sum_with_index(&self, index : usize) -> usize { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `index` [INFO] [stdout] --> src/example.rs:28:30 [INFO] [stdout] | [INFO] [stdout] 28 | fn split_at_index(&self, index : usize) -> (Interval, Interval) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_index` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Increasing` [INFO] [stdout] --> src/example.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | Increasing(usize , usize), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Decreasing` [INFO] [stdout] --> src/example.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | Decreasing(usize, usize), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `sum_with_index` [INFO] [stdout] --> src/example.rs:24:8 [INFO] [stdout] | [INFO] [stdout] 24 | fn sum_with_index(&self, index : usize) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `split_at_index` [INFO] [stdout] --> src/example.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | fn split_at_index(&self, index : usize) -> (Interval, Interval) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> src/example.rs:40:8 [INFO] [stdout] | [INFO] [stdout] 40 | fn new(i : Interval) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `search_split` [INFO] [stdout] --> src/example.rs:81:8 [INFO] [stdout] | [INFO] [stdout] 81 | fn search_split<'a>(&'a mut self, mut index : usize) -> SplayWalker<'a, RAData> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:44:11 [INFO] [stdout] | [INFO] [stdout] 44 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_fmt_panic)]` on by default [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 44 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 44 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:65:11 [INFO] [stdout] | [INFO] [stdout] 65 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 65 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 65 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:85:11 [INFO] [stdout] | [INFO] [stdout] 85 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 85 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 85 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:99:11 [INFO] [stdout] | [INFO] [stdout] 99 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 99 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 99 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:111:11 [INFO] [stdout] | [INFO] [stdout] 111 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 111 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 111 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Increasing` [INFO] [stdout] --> src/example.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | Increasing(usize , usize), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Decreasing` [INFO] [stdout] --> src/example.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | Decreasing(usize, usize), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `sum_with_index` [INFO] [stdout] --> src/example.rs:24:8 [INFO] [stdout] | [INFO] [stdout] 24 | fn sum_with_index(&self, index : usize) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `split_at_index` [INFO] [stdout] --> src/example.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | fn split_at_index(&self, index : usize) -> (Interval, Interval) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> src/example.rs:40:8 [INFO] [stdout] | [INFO] [stdout] 40 | fn new(i : Interval) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `search_split` [INFO] [stdout] --> src/example.rs:81:8 [INFO] [stdout] | [INFO] [stdout] 81 | fn search_split<'a>(&'a mut self, mut index : usize) -> SplayWalker<'a, RAData> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:44:11 [INFO] [stdout] | [INFO] [stdout] 44 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_fmt_panic)]` on by default [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 44 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 44 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:65:11 [INFO] [stdout] | [INFO] [stdout] 65 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 65 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 65 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:85:11 [INFO] [stdout] | [INFO] [stdout] 85 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 85 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 85 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:99:11 [INFO] [stdout] | [INFO] [stdout] 99 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 99 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 99 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/telescope.rs:111:11 [INFO] [stdout] | [INFO] [stdout] 111 | panic!(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this is no longer accepted in Rust 2021 [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 111 | panic!("{}", NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^ [INFO] [stdout] help: or use std::panic::panic_any instead [INFO] [stdout] | [INFO] [stdout] 111 | std::panic::panic_any(NO_VALUE_ERROR); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/example.rs:92:17 [INFO] [stdout] | [INFO] [stdout] 92 | walker.go_left(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/example.rs:92:17 [INFO] [stdout] | [INFO] [stdout] 92 | walker.go_left(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/example.rs:95:17 [INFO] [stdout] | [INFO] [stdout] 95 | walker.go_right(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/example.rs:106:9 [INFO] [stdout] | [INFO] [stdout] 106 | walker.go_right(); // TODO - use the results [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/example.rs:95:17 [INFO] [stdout] | [INFO] [stdout] 95 | walker.go_right(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/example.rs:110:9 [INFO] [stdout] | [INFO] [stdout] 110 | walker.insert_new(RAData::new(i2)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/example.rs:106:9 [INFO] [stdout] | [INFO] [stdout] 106 | walker.go_right(); // TODO - use the results [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/example.rs:110:9 [INFO] [stdout] | [INFO] [stdout] 110 | walker.insert_new(RAData::new(i2)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 17 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 17 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 13.85s [INFO] running `Command { std: "docker" "inspect" "546549945a6151c0cf31001ba8cd2c6b713dd092eee4bc8f4788e4b78d99e689", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "546549945a6151c0cf31001ba8cd2c6b713dd092eee4bc8f4788e4b78d99e689", kill_on_drop: false }` [INFO] [stdout] 546549945a6151c0cf31001ba8cd2c6b713dd092eee4bc8f4788e4b78d99e689