[INFO] updating cached repository sikkiv/rust-samples [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/sikkiv/rust-samples [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/sikkiv/rust-samples" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/sikkiv/rust-samples"` [INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/sikkiv/rust-samples'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/sikkiv/rust-samples" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/sikkiv/rust-samples"` [INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/sikkiv/rust-samples'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 155913a3b97be953c339be7049fd84d8a5fcc5b5 [INFO] sha for GitHub repo sikkiv/rust-samples: 155913a3b97be953c339be7049fd84d8a5fcc5b5 [INFO] validating manifest of sikkiv/rust-samples on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 [INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of sikkiv/rust-samples on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b [INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing sikkiv/rust-samples [INFO] finished frobbing sikkiv/rust-samples [INFO] frobbed toml for sikkiv/rust-samples written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/sikkiv/rust-samples/Cargo.toml [INFO] started frobbing sikkiv/rust-samples [INFO] finished frobbing sikkiv/rust-samples [INFO] frobbed toml for sikkiv/rust-samples written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/sikkiv/rust-samples/Cargo.toml [INFO] crate sikkiv/rust-samples already has a lockfile, it will not be regenerated [INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking sikkiv/rust-samples against try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b for pr-59199 [INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-6/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/sikkiv/rust-samples:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] f7fe0e87dc206897cfc573485cc9ec7b7a1336521db8a2ee740785139c04f83e [INFO] running `"docker" "start" "-a" "f7fe0e87dc206897cfc573485cc9ec7b7a1336521db8a2ee740785139c04f83e"` [INFO] [stderr] Checking ownership v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `fancy` [INFO] [stderr] --> src/main.rs:642:30 [INFO] [stderr] | [INFO] [stderr] 642 | let capturing = |fancy| test; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_fancy` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `scope_valid` [INFO] [stderr] --> src/main.rs:7:13 [INFO] [stderr] | [INFO] [stderr] 7 | let scope_valid = "here it's valid"; [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_scope_valid` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/main.rs:33:13 [INFO] [stderr] | [INFO] [stderr] 33 | let s1 = s; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `u` [INFO] [stderr] --> src/main.rs:68:13 [INFO] [stderr] | [INFO] [stderr] 68 | let u = calculate_length(&s1); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_u` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:104:17 [INFO] [stderr] | [INFO] [stderr] 104 | let r1 = &mut s; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r3` [INFO] [stderr] --> src/main.rs:107:13 [INFO] [stderr] | [INFO] [stderr] 107 | let r3 = &mut s; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `reference_to_something` [INFO] [stderr] --> src/main.rs:129:13 [INFO] [stderr] | [INFO] [stderr] 129 | let reference_to_something = no_dangle(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_reference_to_something` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `first` [INFO] [stderr] --> src/main.rs:138:13 [INFO] [stderr] | [INFO] [stderr] 138 | let first = &s[0..5]; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_first` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `second` [INFO] [stderr] --> src/main.rs:141:13 [INFO] [stderr] | [INFO] [stderr] 141 | let second = &s[6..11]; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_second` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/main.rs:146:13 [INFO] [stderr] | [INFO] [stderr] 146 | let s1 = "Hello world!"; // is a slice pointing to the memory in the binary [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `third_test` [INFO] [stderr] --> src/main.rs:184:13 [INFO] [stderr] | [INFO] [stderr] 184 | let third_test = MyCustomObject { [INFO] [stderr] | ^^^^^^^^^^ help: consider prefixing with an underscore: `_third_test` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `point` [INFO] [stderr] --> src/main.rs:192:13 [INFO] [stderr] | [INFO] [stderr] 192 | let point = Point(0, 0, 0); [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_point` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `home` [INFO] [stderr] --> src/main.rs:221:17 [INFO] [stderr] | [INFO] [stderr] 221 | let home = IpAddr::V4(String::from("127.0.0.1")); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_home` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `loopback` [INFO] [stderr] --> src/main.rs:222:17 [INFO] [stderr] | [INFO] [stderr] 222 | let loopback = IpAddr::V6(String::from("::1")); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_loopback` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `home` [INFO] [stderr] --> src/main.rs:232:17 [INFO] [stderr] | [INFO] [stderr] 232 | let home = IpAddr::V4(127, 0, 0, 1); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_home` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `loopback` [INFO] [stderr] --> src/main.rs:233:17 [INFO] [stderr] | [INFO] [stderr] 233 | let loopback = IpAddr::V6(String::from("::1")); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_loopback` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `some_number` [INFO] [stderr] --> src/main.rs:241:17 [INFO] [stderr] | [INFO] [stderr] 241 | let some_number = Some(5); [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_some_number` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `some_string` [INFO] [stderr] --> src/main.rs:242:17 [INFO] [stderr] | [INFO] [stderr] 242 | let some_string = Some("hello"); [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_some_string` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `absent_number` [INFO] [stderr] --> src/main.rs:243:17 [INFO] [stderr] | [INFO] [stderr] 243 | let absent_number: Option = None; // here we have to explicitly state the type because no infering mechanism possible [INFO] [stderr] | ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_absent_number` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `six` [INFO] [stderr] --> src/main.rs:309:17 [INFO] [stderr] | [INFO] [stderr] 309 | let six = plus_one(five); [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_six` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `none` [INFO] [stderr] --> src/main.rs:310:17 [INFO] [stderr] | [INFO] [stderr] 310 | let none = plus_one(None); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_none` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `six` [INFO] [stderr] --> src/main.rs:324:17 [INFO] [stderr] | [INFO] [stderr] 324 | let six = plus_one(five); [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_six` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `none` [INFO] [stderr] --> src/main.rs:325:17 [INFO] [stderr] | [INFO] [stderr] 325 | let none = plus_one(None); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_none` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `my_vec` [INFO] [stderr] --> src/main.rs:353:17 [INFO] [stderr] | [INFO] [stderr] 353 | let my_vec = vec![1, 2, 3]; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_my_vec` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:361:17 [INFO] [stderr] | [INFO] [stderr] 361 | let f = match f { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:366:17 [INFO] [stderr] | [INFO] [stderr] 366 | let f = match File::open("test.txt") { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:373:17 [INFO] [stderr] | [INFO] [stderr] 373 | let f = match File::open("ksdfksd.txt") { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/main.rs:380:29 [INFO] [stderr] | [INFO] [stderr] 380 | Err(e) => panic!( [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:398:17 [INFO] [stderr] | [INFO] [stderr] 398 | let f = File::open("something-that-does-not-exist.txt").unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:401:17 [INFO] [stderr] | [INFO] [stderr] 401 | let f = File::open("kskiefi.txt").expect("failed opening the file xxx"); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `integer` [INFO] [stderr] --> src/main.rs:438:17 [INFO] [stderr] | [INFO] [stderr] 438 | let integer = Point { x: 5, y: 10 }; [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_integer` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `float` [INFO] [stderr] --> src/main.rs:439:17 [INFO] [stderr] | [INFO] [stderr] 439 | let float = Point { x: 0.5, y: 1.4 }; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_float` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `mixed_int_float` [INFO] [stderr] --> src/main.rs:449:17 [INFO] [stderr] | [INFO] [stderr] 449 | let mixed_int_float = MixedPoint { x: 5, y: 1.0 }; [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_mixed_int_float` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `closure_runs_with_captured_value` [INFO] [stderr] --> src/main.rs:643:17 [INFO] [stderr] | [INFO] [stderr] 643 | let closure_runs_with_captured_value = capturing(1); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_closure_runs_with_captured_value` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/main.rs:78:19 [INFO] [stderr] | [INFO] [stderr] 78 | fn change(s: &String) { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `item` [INFO] [stderr] --> src/main.rs:505:39 [INFO] [stderr] | [INFO] [stderr] 505 | pub fn notify(item: T) { [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_item` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `fancy` [INFO] [stderr] --> src/main.rs:642:30 [INFO] [stderr] | [INFO] [stderr] 642 | let capturing = |fancy| test; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_fancy` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `scope_valid` [INFO] [stderr] --> src/main.rs:7:13 [INFO] [stderr] | [INFO] [stderr] 7 | let scope_valid = "here it's valid"; [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_scope_valid` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/main.rs:33:13 [INFO] [stderr] | [INFO] [stderr] 33 | let s1 = s; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `u` [INFO] [stderr] --> src/main.rs:68:13 [INFO] [stderr] | [INFO] [stderr] 68 | let u = calculate_length(&s1); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_u` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:104:17 [INFO] [stderr] | [INFO] [stderr] 104 | let r1 = &mut s; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r3` [INFO] [stderr] --> src/main.rs:107:13 [INFO] [stderr] | [INFO] [stderr] 107 | let r3 = &mut s; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_r3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `reference_to_something` [INFO] [stderr] --> src/main.rs:129:13 [INFO] [stderr] | [INFO] [stderr] 129 | let reference_to_something = no_dangle(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_reference_to_something` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `first` [INFO] [stderr] --> src/main.rs:138:13 [INFO] [stderr] | [INFO] [stderr] 138 | let first = &s[0..5]; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_first` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `second` [INFO] [stderr] --> src/main.rs:141:13 [INFO] [stderr] | [INFO] [stderr] 141 | let second = &s[6..11]; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_second` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/main.rs:146:13 [INFO] [stderr] | [INFO] [stderr] 146 | let s1 = "Hello world!"; // is a slice pointing to the memory in the binary [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_s1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `third_test` [INFO] [stderr] --> src/main.rs:184:13 [INFO] [stderr] | [INFO] [stderr] 184 | let third_test = MyCustomObject { [INFO] [stderr] | ^^^^^^^^^^ help: consider prefixing with an underscore: `_third_test` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `point` [INFO] [stderr] --> src/main.rs:192:13 [INFO] [stderr] | [INFO] [stderr] 192 | let point = Point(0, 0, 0); [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_point` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `home` [INFO] [stderr] --> src/main.rs:221:17 [INFO] [stderr] | [INFO] [stderr] 221 | let home = IpAddr::V4(String::from("127.0.0.1")); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_home` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `loopback` [INFO] [stderr] --> src/main.rs:222:17 [INFO] [stderr] | [INFO] [stderr] 222 | let loopback = IpAddr::V6(String::from("::1")); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_loopback` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `home` [INFO] [stderr] --> src/main.rs:232:17 [INFO] [stderr] | [INFO] [stderr] 232 | let home = IpAddr::V4(127, 0, 0, 1); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_home` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `loopback` [INFO] [stderr] --> src/main.rs:233:17 [INFO] [stderr] | [INFO] [stderr] 233 | let loopback = IpAddr::V6(String::from("::1")); [INFO] [stderr] | ^^^^^^^^ help: consider prefixing with an underscore: `_loopback` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `some_number` [INFO] [stderr] --> src/main.rs:241:17 [INFO] [stderr] | [INFO] [stderr] 241 | let some_number = Some(5); [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_some_number` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `some_string` [INFO] [stderr] --> src/main.rs:242:17 [INFO] [stderr] | [INFO] [stderr] 242 | let some_string = Some("hello"); [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_some_string` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `absent_number` [INFO] [stderr] --> src/main.rs:243:17 [INFO] [stderr] | [INFO] [stderr] 243 | let absent_number: Option = None; // here we have to explicitly state the type because no infering mechanism possible [INFO] [stderr] | ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_absent_number` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `six` [INFO] [stderr] --> src/main.rs:309:17 [INFO] [stderr] | [INFO] [stderr] 309 | let six = plus_one(five); [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_six` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `none` [INFO] [stderr] --> src/main.rs:310:17 [INFO] [stderr] | [INFO] [stderr] 310 | let none = plus_one(None); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_none` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `six` [INFO] [stderr] --> src/main.rs:324:17 [INFO] [stderr] | [INFO] [stderr] 324 | let six = plus_one(five); [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_six` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `none` [INFO] [stderr] --> src/main.rs:325:17 [INFO] [stderr] | [INFO] [stderr] 325 | let none = plus_one(None); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_none` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `my_vec` [INFO] [stderr] --> src/main.rs:353:17 [INFO] [stderr] | [INFO] [stderr] 353 | let my_vec = vec![1, 2, 3]; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_my_vec` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:361:17 [INFO] [stderr] | [INFO] [stderr] 361 | let f = match f { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:366:17 [INFO] [stderr] | [INFO] [stderr] 366 | let f = match File::open("test.txt") { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:373:17 [INFO] [stderr] | [INFO] [stderr] 373 | let f = match File::open("ksdfksd.txt") { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/main.rs:380:29 [INFO] [stderr] | [INFO] [stderr] 380 | Err(e) => panic!( [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:398:17 [INFO] [stderr] | [INFO] [stderr] 398 | let f = File::open("something-that-does-not-exist.txt").unwrap(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/main.rs:401:17 [INFO] [stderr] | [INFO] [stderr] 401 | let f = File::open("kskiefi.txt").expect("failed opening the file xxx"); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `integer` [INFO] [stderr] --> src/main.rs:438:17 [INFO] [stderr] | [INFO] [stderr] 438 | let integer = Point { x: 5, y: 10 }; [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_integer` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `float` [INFO] [stderr] --> src/main.rs:439:17 [INFO] [stderr] | [INFO] [stderr] 439 | let float = Point { x: 0.5, y: 1.4 }; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_float` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `mixed_int_float` [INFO] [stderr] --> src/main.rs:449:17 [INFO] [stderr] | [INFO] [stderr] 449 | let mixed_int_float = MixedPoint { x: 5, y: 1.0 }; [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_mixed_int_float` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `closure_runs_with_captured_value` [INFO] [stderr] --> src/main.rs:643:17 [INFO] [stderr] | [INFO] [stderr] 643 | let closure_runs_with_captured_value = capturing(1); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_closure_runs_with_captured_value` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/main.rs:78:19 [INFO] [stderr] | [INFO] [stderr] 78 | fn change(s: &String) { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `item` [INFO] [stderr] --> src/main.rs:505:39 [INFO] [stderr] | [INFO] [stderr] 505 | pub fn notify(item: T) { [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_item` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:655:17 [INFO] [stderr] | [INFO] [stderr] 655 | let mut v_iter = v.iter(); [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:655:17 [INFO] [stderr] | [INFO] [stderr] 655 | let mut v_iter = v.iter(); [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `build_user` [INFO] [stderr] --> src/main.rs:176:9 [INFO] [stderr] | [INFO] [stderr] 176 | fn build_user(name: String, active: bool) -> MyCustomObject { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Special` [INFO] [stderr] --> src/main.rs:249:17 [INFO] [stderr] | [INFO] [stderr] 249 | Special, [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Nothing` [INFO] [stderr] --> src/main.rs:251:17 [INFO] [stderr] | [INFO] [stderr] 251 | Nothing, [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Boring` [INFO] [stderr] --> src/main.rs:252:17 [INFO] [stderr] | [INFO] [stderr] 252 | Boring, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Active` [INFO] [stderr] --> src/main.rs:278:17 [INFO] [stderr] | [INFO] [stderr] 278 | Active, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `IBM` [INFO] [stderr] --> src/main.rs:282:17 [INFO] [stderr] | [INFO] [stderr] 282 | IBM, [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `PowerPC` [INFO] [stderr] --> src/main.rs:283:17 [INFO] [stderr] | [INFO] [stderr] 283 | PowerPC, [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `read_username_from_file` [INFO] [stderr] --> src/main.rs:411:13 [INFO] [stderr] | [INFO] [stderr] 411 | fn read_username_from_file() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `read_something_from_file` [INFO] [stderr] --> src/main.rs:422:13 [INFO] [stderr] | [INFO] [stderr] 422 | fn read_something_from_file() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never used: `x` [INFO] [stderr] --> src/main.rs:434:17 [INFO] [stderr] | [INFO] [stderr] 434 | x: T, [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never used: `y` [INFO] [stderr] --> src/main.rs:435:17 [INFO] [stderr] | [INFO] [stderr] 435 | y: T, [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: field is never used: `x` [INFO] [stderr] --> src/main.rs:445:17 [INFO] [stderr] | [INFO] [stderr] 445 | x: T, [INFO] [stderr] | ^^^^ [INFO] [stderr] warning: cannot test inner items [INFO] [stderr] --> src/main.rs:593:13 [INFO] [stderr] | [INFO] [stderr] 593 | #[test] [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unnameable_test_items)] on by default [INFO] [stderr] [INFO] [stderr] [INFO] [stderr] warning: field is never used: `y` [INFO] [stderr] --> src/main.rs:446:17 [INFO] [stderr] | [INFO] [stderr] 446 | y: U, [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `x` [INFO] [stderr] --> src/main.rs:454:17 [INFO] [stderr] | [INFO] [stderr] 454 | fn x(&self) -> &T { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `distance_from_origin` [INFO] [stderr] --> src/main.rs:461:17 [INFO] [stderr] | [INFO] [stderr] 461 | fn distance_from_origin(&self) -> f32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `mixup` [INFO] [stderr] --> src/main.rs:469:17 [INFO] [stderr] | [INFO] [stderr] 469 | fn mixup(self, other: MixedPoint) -> MixedPoint { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Tweet` [INFO] [stderr] --> src/main.rs:486:13 [INFO] [stderr] | [INFO] [stderr] 486 | pub struct Tweet { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `notify` [INFO] [stderr] --> src/main.rs:505:13 [INFO] [stderr] | [INFO] [stderr] 505 | pub fn notify(item: T) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Pair` [INFO] [stderr] --> src/main.rs:526:13 [INFO] [stderr] | [INFO] [stderr] 526 | struct Pair { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/main.rs:532:17 [INFO] [stderr] | [INFO] [stderr] 532 | fn new(x: T, y: T) -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `cmp_display` [INFO] [stderr] --> src/main.rs:538:17 [INFO] [stderr] | [INFO] [stderr] 538 | fn cmp_display(&self) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `longest` [INFO] [stderr] --> src/main.rs:573:13 [INFO] [stderr] | [INFO] [stderr] 573 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Test` [INFO] [stderr] --> src/main.rs:633:13 [INFO] [stderr] | [INFO] [stderr] 633 | / struct Test [INFO] [stderr] 634 | | where [INFO] [stderr] 635 | | T: Fn(u32) -> u32, [INFO] [stderr] 636 | | { [INFO] [stderr] 637 | | closure_within_struct: T, [INFO] [stderr] 638 | | some_other_value: Option, [INFO] [stderr] 639 | | } [INFO] [stderr] | |_____________^ [INFO] [stderr] [INFO] [stderr] warning: cannot test inner items [INFO] [stderr] --> src/main.rs:599:13 [INFO] [stderr] | [INFO] [stderr] 599 | #[test] [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: cannot test inner items [INFO] [stderr] --> src/main.rs:610:13 [INFO] [stderr] | [INFO] [stderr] 610 | #[test] [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.61s [INFO] running `"docker" "inspect" "f7fe0e87dc206897cfc573485cc9ec7b7a1336521db8a2ee740785139c04f83e"` [INFO] running `"docker" "rm" "-f" "f7fe0e87dc206897cfc573485cc9ec7b7a1336521db8a2ee740785139c04f83e"` [INFO] [stdout] f7fe0e87dc206897cfc573485cc9ec7b7a1336521db8a2ee740785139c04f83e