[INFO] cloning repository https://github.com/yuya373/trpl [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yuya373/trpl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuya373%2Ftrpl", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuya373%2Ftrpl'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] a44a0c09f12646a37cdfc1d60dcf404910d06f75 [INFO] checking yuya373/trpl against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuya373%2Ftrpl" "/workspace/builds/worker-4/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/yuya373/trpl on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/yuya373/trpl [INFO] finished tweaking git repo https://github.com/yuya373/trpl [INFO] tweaked toml for git repo https://github.com/yuya373/trpl written to /workspace/builds/worker-4/source/Cargo.toml [INFO] crate git repo https://github.com/yuya373/trpl already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 53e4ac70e6bfe207b298e969d5d76afa48ddecbc5d317ce23605778a7180dc90 [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" "53e4ac70e6bfe207b298e969d5d76afa48ddecbc5d317ce23605778a7180dc90", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "53e4ac70e6bfe207b298e969d5d76afa48ddecbc5d317ce23605778a7180dc90", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "53e4ac70e6bfe207b298e969d5d76afa48ddecbc5d317ce23605778a7180dc90", kill_on_drop: false }` [INFO] [stdout] 53e4ac70e6bfe207b298e969d5d76afa48ddecbc5d317ce23605778a7180dc90 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 4396ffb2b929b21d5f203e86f483c43cb42a4346cc477d23c3c2043607d13a16 [INFO] running `Command { std: "docker" "start" "-a" "4396ffb2b929b21d5f203e86f483c43cb42a4346cc477d23c3c2043607d13a16", kill_on_drop: false }` [INFO] [stderr] Checking chapter7 v0.1.0 (/opt/rustwide/workdir/chapter7) [INFO] [stderr] Checking chapter6 v0.1.0 (/opt/rustwide/workdir/chapter6) [INFO] [stderr] Checking chapter8 v0.1.0 (/opt/rustwide/workdir/chapter8) [INFO] [stderr] Checking chapter10 v0.1.0 (/opt/rustwide/workdir/chapter10) [INFO] [stderr] Checking chapter5 v0.1.0 (/opt/rustwide/workdir/chapter5) [INFO] [stderr] Checking chapter4 v0.1.0 (/opt/rustwide/workdir/chapter4) [INFO] [stderr] Checking chapter9 v0.1.0 (/opt/rustwide/workdir/chapter9) [INFO] [stdout] warning: field is never read: `part` [INFO] [stdout] --> chapter10/src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | part: &'a str, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `announce_and_return_part` [INFO] [stdout] --> chapter10/src/main.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 15 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `part` [INFO] [stdout] --> chapter10/src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | part: &'a str, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `announce_and_return_part` [INFO] [stdout] --> chapter10/src/main.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 15 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_u8_value` [INFO] [stdout] --> chapter6/src/main.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let some_u8_value = Some(0u8); [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_u8_value` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_u8_value` [INFO] [stdout] --> chapter6/src/main.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let some_u8_value = Some(0u8); [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_u8_value` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `ChangeColor` [INFO] [stdout] --> chapter6/src/main.rs:49:5 [INFO] [stdout] | [INFO] [stdout] 49 | ChangeColor(i32, i32, i32), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Alabama` [INFO] [stdout] --> chapter6/src/main.rs:59:5 [INFO] [stdout] | [INFO] [stdout] 59 | Alabama, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Nickel` [INFO] [stdout] --> chapter6/src/main.rs:65:5 [INFO] [stdout] | [INFO] [stdout] 65 | Nickel, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Dime` [INFO] [stdout] --> chapter6/src/main.rs:66:5 [INFO] [stdout] | [INFO] [stdout] 66 | Dime, [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> chapter4/src/main.rs:75:9 [INFO] [stdout] | [INFO] [stdout] 75 | let s1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> chapter4/src/main.rs:86:13 [INFO] [stdout] | [INFO] [stdout] 86 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> chapter4/src/main.rs:88:9 [INFO] [stdout] | [INFO] [stdout] 88 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> chapter4/src/main.rs:92:9 [INFO] [stdout] | [INFO] [stdout] 92 | let r1 = &s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> chapter4/src/main.rs:94:9 [INFO] [stdout] | [INFO] [stdout] 94 | let r2 = &s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> chapter4/src/main.rs:75:9 [INFO] [stdout] | [INFO] [stdout] 75 | let s1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> chapter4/src/main.rs:86:13 [INFO] [stdout] | [INFO] [stdout] 86 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> chapter4/src/main.rs:88:9 [INFO] [stdout] | [INFO] [stdout] 88 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> chapter4/src/main.rs:92:9 [INFO] [stdout] | [INFO] [stdout] 92 | let r1 = &s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> chapter4/src/main.rs:94:9 [INFO] [stdout] | [INFO] [stdout] 94 | let r2 = &s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `ChangeColor` [INFO] [stdout] --> chapter6/src/main.rs:49:5 [INFO] [stdout] | [INFO] [stdout] 49 | ChangeColor(i32, i32, i32), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `user2` [INFO] [stdout] --> chapter5/src/main.rs:12:9 [INFO] [stdout] | [INFO] [stdout] 12 | let user2 = User { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `black` [INFO] [stdout] --> chapter5/src/main.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let black = Color(0, 0, 0); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Alabama` [INFO] [stdout] --> chapter6/src/main.rs:59:5 [INFO] [stdout] | [INFO] [stdout] 59 | Alabama, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> chapter4/src/main.rs:90:9 [INFO] [stdout] | [INFO] [stdout] 90 | let mut s = String::from("hello"); [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: variable does not need to be mutable [INFO] [stdout] --> chapter4/src/main.rs:108:9 [INFO] [stdout] | [INFO] [stdout] 108 | let mut s = String::from("hello world"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> chapter4/src/main.rs:90:9 [INFO] [stdout] | [INFO] [stdout] 90 | let mut s = String::from("hello"); [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: variable does not need to be mutable [INFO] [stdout] --> chapter4/src/main.rs:108:9 [INFO] [stdout] | [INFO] [stdout] 108 | let mut s = String::from("hello world"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Nickel` [INFO] [stdout] --> chapter6/src/main.rs:65:5 [INFO] [stdout] | [INFO] [stdout] 65 | Nickel, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Dime` [INFO] [stdout] --> chapter6/src/main.rs:66:5 [INFO] [stdout] | [INFO] [stdout] 66 | Dime, [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `no_dangle` [INFO] [stdout] --> chapter4/src/main.rs:168:4 [INFO] [stdout] | [INFO] [stdout] 168 | fn no_dangle() -> String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `no_dangle` [INFO] [stdout] --> chapter4/src/main.rs:168:4 [INFO] [stdout] | [INFO] [stdout] 168 | fn no_dangle() -> String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `sign_in_count` [INFO] [stdout] --> chapter5/src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 53 | sign_in_count: u64, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `active` [INFO] [stdout] --> chapter5/src/main.rs:54:5 [INFO] [stdout] | [INFO] [stdout] 54 | active: bool, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> chapter5/src/main.rs:67:8 [INFO] [stdout] | [INFO] [stdout] 67 | fn new(email: String, username: String) -> User { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `square` [INFO] [stdout] --> chapter5/src/main.rs:97:8 [INFO] [stdout] | [INFO] [stdout] 97 | fn square(size: u32) -> Rectangle { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> chapter8/src/main.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | let mut v = vec![1, 2, 3, 4, 5]; [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: associated function is never used: `widen` [INFO] [stdout] --> chapter5/src/main.rs:105:8 [INFO] [stdout] | [INFO] [stdout] 105 | fn widen(&mut self, n: u32) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `takes_ownership` [INFO] [stdout] --> chapter5/src/main.rs:109:8 [INFO] [stdout] | [INFO] [stdout] 109 | fn takes_ownership(self) -> Rectangle { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `transform` [INFO] [stdout] --> chapter5/src/main.rs:113:8 [INFO] [stdout] | [INFO] [stdout] 113 | fn transform(self, w: u32, h: u32) -> Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> chapter8/src/main.rs:134:13 [INFO] [stdout] | [INFO] [stdout] 134 | let mut count = map.entry(i).or_insert(0); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `user2` [INFO] [stdout] --> chapter5/src/main.rs:12:9 [INFO] [stdout] | [INFO] [stdout] 12 | let user2 = User { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `black` [INFO] [stdout] --> chapter5/src/main.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let black = Color(0, 0, 0); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> chapter8/src/main.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | let mut v = vec![1, 2, 3, 4, 5]; [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: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> chapter8/src/main.rs:134:13 [INFO] [stdout] | [INFO] [stdout] 134 | let mut count = map.entry(i).or_insert(0); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> chapter8/src/main.rs:206:17 [INFO] [stdout] | [INFO] [stdout] 206 | &members.sort(); [INFO] [stdout] | ^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 206 | let _ = &members.sort(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> chapter8/src/main.rs:224:9 [INFO] [stdout] | [INFO] [stdout] 224 | / &all_members.sort_by(|&a, &b| { [INFO] [stdout] 225 | | let (name1, _) = a; [INFO] [stdout] 226 | | let (name2, _) = b; [INFO] [stdout] 227 | | return name1.cmp(name2); [INFO] [stdout] 228 | | }); [INFO] [stdout] | |__________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 224 | let _ = &all_members.sort_by(|&a, &b| { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `sign_in_count` [INFO] [stdout] --> chapter5/src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 53 | sign_in_count: u64, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `active` [INFO] [stdout] --> chapter5/src/main.rs:54:5 [INFO] [stdout] | [INFO] [stdout] 54 | active: bool, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> chapter5/src/main.rs:67:8 [INFO] [stdout] | [INFO] [stdout] 67 | fn new(email: String, username: String) -> User { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `square` [INFO] [stdout] --> chapter5/src/main.rs:97:8 [INFO] [stdout] | [INFO] [stdout] 97 | fn square(size: u32) -> Rectangle { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `widen` [INFO] [stdout] --> chapter5/src/main.rs:105:8 [INFO] [stdout] | [INFO] [stdout] 105 | fn widen(&mut self, n: u32) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `takes_ownership` [INFO] [stdout] --> chapter5/src/main.rs:109:8 [INFO] [stdout] | [INFO] [stdout] 109 | fn takes_ownership(self) -> Rectangle { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `transform` [INFO] [stdout] --> chapter5/src/main.rs:113:8 [INFO] [stdout] | [INFO] [stdout] 113 | fn transform(self, w: u32, h: u32) -> Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> chapter8/src/main.rs:206:17 [INFO] [stdout] | [INFO] [stdout] 206 | &members.sort(); [INFO] [stdout] | ^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 206 | let _ = &members.sort(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> chapter8/src/main.rs:224:9 [INFO] [stdout] | [INFO] [stdout] 224 | / &all_members.sort_by(|&a, &b| { [INFO] [stdout] 225 | | let (name1, _) = a; [INFO] [stdout] 226 | | let (name2, _) = b; [INFO] [stdout] 227 | | return name1.cmp(name2); [INFO] [stdout] 228 | | }); [INFO] [stdout] | |__________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 224 | let _ = &all_members.sort_by(|&a, &b| { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2.23s [INFO] running `Command { std: "docker" "inspect" "4396ffb2b929b21d5f203e86f483c43cb42a4346cc477d23c3c2043607d13a16", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4396ffb2b929b21d5f203e86f483c43cb42a4346cc477d23c3c2043607d13a16", kill_on_drop: false }` [INFO] [stdout] 4396ffb2b929b21d5f203e86f483c43cb42a4346cc477d23c3c2043607d13a16