[INFO] updating cached repository https://github.com/edidada/iron [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] c8015777abd66e0e182f2441f218f02941d5e7e0 [INFO] checking edidada/iron against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedidada%2Firon" "/workspace/builds/worker-13/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/edidada/iron on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b [INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/edidada/iron [INFO] finished tweaking git repo https://github.com/edidada/iron [INFO] tweaked toml for git repo https://github.com/edidada/iron written to /workspace/builds/worker-13/source/Cargo.toml [INFO] crate git repo https://github.com/edidada/iron already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 23f0c82b5bc241baf857ca417f7b2e3480e92bbb9f974a1a35de2294bc7d831c [INFO] running `"docker" "start" "-a" "23f0c82b5bc241baf857ca417f7b2e3480e92bbb9f974a1a35de2294bc7d831c"` [INFO] [stderr] Compiling rand_core v0.3.0 [INFO] [stderr] Compiling libc v0.2.43 [INFO] [stderr] Compiling siphasher v0.2.3 [INFO] [stderr] Checking matches v0.1.8 [INFO] [stderr] Checking traitobject v0.1.0 [INFO] [stderr] Checking unicode-normalization v0.1.7 [INFO] [stderr] Compiling httparse v1.3.3 [INFO] [stderr] Checking percent-encoding v1.0.1 [INFO] [stderr] Checking safemem v0.3.0 [INFO] [stderr] Checking byteorder v1.2.7 [INFO] [stderr] Checking typeable v0.1.2 [INFO] [stderr] Checking language-tags v0.2.2 [INFO] [stderr] Checking modifier v0.1.0 [INFO] [stderr] Compiling unicase v1.4.2 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking unicode-bidi v0.3.4 [INFO] [stderr] Checking unsafe-any v0.4.2 [INFO] [stderr] Checking typemap v0.3.3 [INFO] [stderr] Checking log v0.3.9 [INFO] [stderr] Compiling rand_core v0.2.2 [INFO] [stderr] Checking plugin v0.2.6 [INFO] [stderr] Checking base64 v0.9.3 [INFO] [stderr] Checking mime v0.2.6 [INFO] [stderr] Compiling phf_shared v0.7.23 [INFO] [stderr] Checking phf v0.7.23 [INFO] [stderr] Compiling rand v0.5.5 [INFO] [stderr] Compiling phf_generator v0.7.23 [INFO] [stderr] Compiling phf_codegen v0.7.23 [INFO] [stderr] Compiling mime_guess v1.8.6 [INFO] [stderr] Checking idna v0.1.5 [INFO] [stderr] Checking url v1.7.2 [INFO] [stderr] Checking hyper v0.10.15 [INFO] [stderr] Checking iron v0.6.0 [INFO] [stderr] Checking testiron v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: use of deprecated item 'std::f64::::abs_sub': you probably meant `(self - other).abs()`: this operation is `(self - other).max(0.0)` except that `abs_sub` also propagates NaNs (also known as `fdim` in C). If you truly need the positive difference, consider using that expression or the C function `fdim`, depending on how you wish to handle NaN (please consider filing an issue describing your use-case too). [INFO] [stderr] --> src/foo.rs:88:18 [INFO] [stderr] | [INFO] [stderr] 88 | let zero = z.abs_sub(123.4); [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/foo.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let x: i32 = 5; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b1` [INFO] [stderr] --> src/foo.rs:39:9 [INFO] [stderr] | [INFO] [stderr] 39 | let b1:u32 = 5; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_b1` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `a` is never read [INFO] [stderr] --> src/foo.rs:47:13 [INFO] [stderr] | [INFO] [stderr] 47 | let mut a: f64 = 1.0; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/foo.rs:48:9 [INFO] [stderr] | [INFO] [stderr] 48 | let b = 2.0f32; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/foo.rs:55:9 [INFO] [stderr] | [INFO] [stderr] 55 | let a = a; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `t` [INFO] [stderr] --> src/foo.rs:78:9 [INFO] [stderr] | [INFO] [stderr] 78 | let t = true; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_t` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/foo.rs:79:9 [INFO] [stderr] | [INFO] [stderr] 79 | let f: bool = false; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/foo.rs:82:9 [INFO] [stderr] | [INFO] [stderr] 82 | let c = 'c'; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_c` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/foo.rs:85:9 [INFO] [stderr] | [INFO] [stderr] 85 | let x = 42; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/foo.rs:86:9 [INFO] [stderr] | [INFO] [stderr] 86 | let y: u32 = 123_456; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `zero` [INFO] [stderr] --> src/foo.rs:88:9 [INFO] [stderr] | [INFO] [stderr] 88 | let zero = z.abs_sub(123.4); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_zero` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `bin` [INFO] [stderr] --> src/foo.rs:89:9 [INFO] [stderr] | [INFO] [stderr] 89 | let bin = 0b1111_0000; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_bin` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `oct` [INFO] [stderr] --> src/foo.rs:90:9 [INFO] [stderr] | [INFO] [stderr] 90 | let oct = 0o7320_1546; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_oct` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hex` [INFO] [stderr] --> src/foo.rs:91:9 [INFO] [stderr] | [INFO] [stderr] 91 | let hex = 0x7320_1511; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_hex` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `string` [INFO] [stderr] --> src/foo.rs:95:13 [INFO] [stderr] | [INFO] [stderr] 95 | let mut string = str.to_string(); [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_string` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `middle` [INFO] [stderr] --> src/foo.rs:99:9 [INFO] [stderr] | [INFO] [stderr] 99 | let middle = &a[1..4]; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_middle` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `ten_zeros` [INFO] [stderr] --> src/foo.rs:100:13 [INFO] [stderr] | [INFO] [stderr] 100 | let mut ten_zeros: [i64; 10] = [0; 10]; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_ten_zeros` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `fifty` [INFO] [stderr] --> src/foo.rs:104:10 [INFO] [stderr] | [INFO] [stderr] 104 | let (fifty, _) = tuple; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_fifty` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/foo.rs:105:9 [INFO] [stderr] | [INFO] [stderr] 105 | let hello = tuple.1; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `points_at` [INFO] [stderr] --> src/foo.rs:110:9 [INFO] [stderr] | [INFO] [stderr] 110 | let points_at = unsafe { *raw }; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_points_at` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `bar` [INFO] [stderr] --> src/foo.rs:114:9 [INFO] [stderr] | [INFO] [stderr] 114 | let bar: fn(i32) -> i32 = foo; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_bar` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `character` [INFO] [stderr] --> src/foo.rs:118:9 [INFO] [stderr] | [INFO] [stderr] 118 | let character = integer as char; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_character` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/foo.rs:140:9 [INFO] [stderr] | [INFO] [stderr] 140 | let v: Vec = Vec::new(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/foo.rs:142:9 [INFO] [stderr] | [INFO] [stderr] 142 | let v: Vec = vec![]; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/foo.rs:144:9 [INFO] [stderr] | [INFO] [stderr] 144 | let v = vec![1, 2, 3, 4, 5]; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/foo.rs:146:9 [INFO] [stderr] | [INFO] [stderr] 146 | let v = vec![0; 10]; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `two` [INFO] [stderr] --> src/foo.rs:152:9 [INFO] [stderr] | [INFO] [stderr] 152 | let two = v.pop(); [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_two` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `three` [INFO] [stderr] --> src/foo.rs:155:9 [INFO] [stderr] | [INFO] [stderr] 155 | let three = v[2]; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_three` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/foo.rs:161:9 [INFO] [stderr] | [INFO] [stderr] 161 | let hello = "Hello, world!"; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/foo.rs:164:9 [INFO] [stderr] | [INFO] [stderr] 164 | let hello: &'static str = "Hello, world!"; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/foo.rs:167:13 [INFO] [stderr] | [INFO] [stderr] 167 | let mut s = String::new(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: use of deprecated item 'std::f64::::abs_sub': you probably meant `(self - other).abs()`: this operation is `(self - other).max(0.0)` except that `abs_sub` also propagates NaNs (also known as `fdim` in C). If you truly need the positive difference, consider using that expression or the C function `fdim`, depending on how you wish to handle NaN (please consider filing an issue describing your use-case too). [INFO] [stderr] --> src/foo.rs:88:18 [INFO] [stderr] | [INFO] [stderr] 88 | let zero = z.abs_sub(123.4); [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/foo.rs:95:9 [INFO] [stderr] | [INFO] [stderr] 95 | let mut string = str.to_string(); [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/foo.rs:100:9 [INFO] [stderr] | [INFO] [stderr] 100 | let mut ten_zeros: [i64; 10] = [0; 10]; [INFO] [stderr] | ----^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/foo.rs:167:9 [INFO] [stderr] | [INFO] [stderr] 167 | let mut s = String::new(); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: enum is never used: `Direction` [INFO] [stderr] --> src/foo.rs:2:1 [INFO] [stderr] | [INFO] [stderr] 2 | enum Direction { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testenum` [INFO] [stderr] --> src/foo.rs:8:1 [INFO] [stderr] | [INFO] [stderr] 8 | pub fn testenum() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test` [INFO] [stderr] --> src/foo.rs:19:1 [INFO] [stderr] | [INFO] [stderr] 19 | fn test(){ [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testprints` [INFO] [stderr] --> src/foo.rs:28:1 [INFO] [stderr] | [INFO] [stderr] 28 | fn testprints() { [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testlet` [INFO] [stderr] --> src/foo.rs:33:1 [INFO] [stderr] | [INFO] [stderr] 33 | fn testlet() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testa` [INFO] [stderr] --> src/foo.rs:46:1 [INFO] [stderr] | [INFO] [stderr] 46 | fn testa() { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testlet2` [INFO] [stderr] --> src/foo.rs:64:1 [INFO] [stderr] | [INFO] [stderr] 64 | fn testlet2() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `tests` [INFO] [stderr] --> src/foo.rs:75:1 [INFO] [stderr] | [INFO] [stderr] 75 | fn tests(){ [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testarray` [INFO] [stderr] --> src/foo.rs:126:1 [INFO] [stderr] | [INFO] [stderr] 126 | fn testarray() { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `teststr` [INFO] [stderr] --> src/foo.rs:159:1 [INFO] [stderr] | [INFO] [stderr] 159 | fn teststr(){ [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/foo.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let x: i32 = 5; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b1` [INFO] [stderr] --> src/foo.rs:39:9 [INFO] [stderr] | [INFO] [stderr] 39 | let b1:u32 = 5; [INFO] [stderr] | ^^ help: consider prefixing with an underscore: `_b1` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `a` is never read [INFO] [stderr] --> src/foo.rs:47:13 [INFO] [stderr] | [INFO] [stderr] 47 | let mut a: f64 = 1.0; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/foo.rs:48:9 [INFO] [stderr] | [INFO] [stderr] 48 | let b = 2.0f32; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/foo.rs:55:9 [INFO] [stderr] | [INFO] [stderr] 55 | let a = a; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `t` [INFO] [stderr] --> src/foo.rs:78:9 [INFO] [stderr] | [INFO] [stderr] 78 | let t = true; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_t` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/foo.rs:79:9 [INFO] [stderr] | [INFO] [stderr] 79 | let f: bool = false; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/foo.rs:82:9 [INFO] [stderr] | [INFO] [stderr] 82 | let c = 'c'; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_c` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/foo.rs:85:9 [INFO] [stderr] | [INFO] [stderr] 85 | let x = 42; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/foo.rs:86:9 [INFO] [stderr] | [INFO] [stderr] 86 | let y: u32 = 123_456; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `zero` [INFO] [stderr] --> src/foo.rs:88:9 [INFO] [stderr] | [INFO] [stderr] 88 | let zero = z.abs_sub(123.4); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_zero` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `bin` [INFO] [stderr] --> src/foo.rs:89:9 [INFO] [stderr] | [INFO] [stderr] 89 | let bin = 0b1111_0000; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_bin` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `oct` [INFO] [stderr] --> src/foo.rs:90:9 [INFO] [stderr] | [INFO] [stderr] 90 | let oct = 0o7320_1546; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_oct` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hex` [INFO] [stderr] --> src/foo.rs:91:9 [INFO] [stderr] | [INFO] [stderr] 91 | let hex = 0x7320_1511; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_hex` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `string` [INFO] [stderr] --> src/foo.rs:95:13 [INFO] [stderr] | [INFO] [stderr] 95 | let mut string = str.to_string(); [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_string` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `middle` [INFO] [stderr] --> src/foo.rs:99:9 [INFO] [stderr] | [INFO] [stderr] 99 | let middle = &a[1..4]; [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_middle` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `ten_zeros` [INFO] [stderr] --> src/foo.rs:100:13 [INFO] [stderr] | [INFO] [stderr] 100 | let mut ten_zeros: [i64; 10] = [0; 10]; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_ten_zeros` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `fifty` [INFO] [stderr] --> src/foo.rs:104:10 [INFO] [stderr] | [INFO] [stderr] 104 | let (fifty, _) = tuple; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_fifty` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/foo.rs:105:9 [INFO] [stderr] | [INFO] [stderr] 105 | let hello = tuple.1; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `points_at` [INFO] [stderr] --> src/foo.rs:110:9 [INFO] [stderr] | [INFO] [stderr] 110 | let points_at = unsafe { *raw }; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_points_at` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `bar` [INFO] [stderr] --> src/foo.rs:114:9 [INFO] [stderr] | [INFO] [stderr] 114 | let bar: fn(i32) -> i32 = foo; [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_bar` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `character` [INFO] [stderr] --> src/foo.rs:118:9 [INFO] [stderr] | [INFO] [stderr] 118 | let character = integer as char; [INFO] [stderr] | ^^^^^^^^^ help: consider prefixing with an underscore: `_character` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/foo.rs:140:9 [INFO] [stderr] | [INFO] [stderr] 140 | let v: Vec = Vec::new(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/foo.rs:142:9 [INFO] [stderr] | [INFO] [stderr] 142 | let v: Vec = vec![]; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/foo.rs:144:9 [INFO] [stderr] | [INFO] [stderr] 144 | let v = vec![1, 2, 3, 4, 5]; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/foo.rs:146:9 [INFO] [stderr] | [INFO] [stderr] 146 | let v = vec![0; 10]; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `two` [INFO] [stderr] --> src/foo.rs:152:9 [INFO] [stderr] | [INFO] [stderr] 152 | let two = v.pop(); [INFO] [stderr] | ^^^ help: consider prefixing with an underscore: `_two` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `three` [INFO] [stderr] --> src/foo.rs:155:9 [INFO] [stderr] | [INFO] [stderr] 155 | let three = v[2]; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_three` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/foo.rs:161:9 [INFO] [stderr] | [INFO] [stderr] 161 | let hello = "Hello, world!"; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `hello` [INFO] [stderr] --> src/foo.rs:164:9 [INFO] [stderr] | [INFO] [stderr] 164 | let hello: &'static str = "Hello, world!"; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_hello` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/foo.rs:167:13 [INFO] [stderr] | [INFO] [stderr] 167 | let mut s = String::new(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/foo.rs:95:9 [INFO] [stderr] | [INFO] [stderr] 95 | let mut string = str.to_string(); [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/foo.rs:100:9 [INFO] [stderr] | [INFO] [stderr] 100 | let mut ten_zeros: [i64; 10] = [0; 10]; [INFO] [stderr] | ----^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/foo.rs:167:9 [INFO] [stderr] | [INFO] [stderr] 167 | let mut s = String::new(); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: enum is never used: `Direction` [INFO] [stderr] --> src/foo.rs:2:1 [INFO] [stderr] | [INFO] [stderr] 2 | enum Direction { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testenum` [INFO] [stderr] --> src/foo.rs:8:1 [INFO] [stderr] | [INFO] [stderr] 8 | pub fn testenum() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test` [INFO] [stderr] --> src/foo.rs:19:1 [INFO] [stderr] | [INFO] [stderr] 19 | fn test(){ [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testprints` [INFO] [stderr] --> src/foo.rs:28:1 [INFO] [stderr] | [INFO] [stderr] 28 | fn testprints() { [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testlet` [INFO] [stderr] --> src/foo.rs:33:1 [INFO] [stderr] | [INFO] [stderr] 33 | fn testlet() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testa` [INFO] [stderr] --> src/foo.rs:46:1 [INFO] [stderr] | [INFO] [stderr] 46 | fn testa() { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testlet2` [INFO] [stderr] --> src/foo.rs:64:1 [INFO] [stderr] | [INFO] [stderr] 64 | fn testlet2() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `tests` [INFO] [stderr] --> src/foo.rs:75:1 [INFO] [stderr] | [INFO] [stderr] 75 | fn tests(){ [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `testarray` [INFO] [stderr] --> src/foo.rs:126:1 [INFO] [stderr] | [INFO] [stderr] 126 | fn testarray() { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `teststr` [INFO] [stderr] --> src/foo.rs:159:1 [INFO] [stderr] | [INFO] [stderr] 159 | fn teststr(){ [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 23.68s [INFO] running `"docker" "inspect" "23f0c82b5bc241baf857ca417f7b2e3480e92bbb9f974a1a35de2294bc7d831c"` [INFO] running `"docker" "rm" "-f" "23f0c82b5bc241baf857ca417f7b2e3480e92bbb9f974a1a35de2294bc7d831c"` [INFO] [stdout] 23f0c82b5bc241baf857ca417f7b2e3480e92bbb9f974a1a35de2294bc7d831c