[INFO] updating cached repository jssandh2/rust-systems [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/jssandh2/rust-systems [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/jssandh2/rust-systems" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/jssandh2/rust-systems"` [INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/jssandh2/rust-systems'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/jssandh2/rust-systems" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/jssandh2/rust-systems"` [INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/jssandh2/rust-systems'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 8aa595ec1d2e3e73ce837435c99a87ad84324bbb [INFO] sha for GitHub repo jssandh2/rust-systems: 8aa595ec1d2e3e73ce837435c99a87ad84324bbb [INFO] validating manifest of jssandh2/rust-systems 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 jssandh2/rust-systems 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 jssandh2/rust-systems [INFO] finished frobbing jssandh2/rust-systems [INFO] frobbed toml for jssandh2/rust-systems written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/jssandh2/rust-systems/Cargo.toml [INFO] started frobbing jssandh2/rust-systems [INFO] finished frobbing jssandh2/rust-systems [INFO] frobbed toml for jssandh2/rust-systems written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/jssandh2/rust-systems/Cargo.toml [INFO] crate jssandh2/rust-systems 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 jssandh2/rust-systems against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199 [INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-4/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/jssandh2/rust-systems:/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" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 4c68559ee87592645dffc04e8c24fb6bb390a4433977eeacc86cade2ceda6ab0 [INFO] running `"docker" "start" "-a" "4c68559ee87592645dffc04e8c24fb6bb390a4433977eeacc86cade2ceda6ab0"` [INFO] [stderr] Checking rust-systems v0.0.1 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/vectors.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | let x = Box::new(5); // This is closer to the Type-Theoretic defn of `List` := Nil | Cons(T, Box(List)) [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: `y` [INFO] [stderr] --> src/test/conditionals_and_loops.rs:14:9 [INFO] [stderr] | [INFO] [stderr] 14 | let y = if x == 5 { 10 } else { 15 }; // y : i32 [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around assigned value [INFO] [stderr] --> src/test/functions.rs:20:13 [INFO] [stderr] | [INFO] [stderr] 20 | let x = (y = 6); // `x` has the value `()`, _NOT_ 6 [INFO] [stderr] | ^^^^^^^ help: remove these parentheses [INFO] [stderr] warning: unnecessary parentheses around assigned value [INFO] [stderr] --> src/test/primitive_types.rs:47:13 [INFO] [stderr] | [INFO] [stderr] 47 | let b = (0); // Normal zero [INFO] [stderr] | ^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_parens)] on by default [INFO] [stderr] [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_parens)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/conditionals_and_loops.rs:14:9 [INFO] [stderr] | [INFO] [stderr] 14 | let y = if x == 5 { 10 } else { 15 }; // y : i32 [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unreachable statement [INFO] [stderr] --> src/test/functions.rs:23:5 [INFO] [stderr] | [INFO] [stderr] 23 | let x: String = diverges(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unreachable_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: variable `y` is assigned to, but never used [INFO] [stderr] --> src/test/functions.rs:19:13 [INFO] [stderr] | [INFO] [stderr] 19 | let mut y = 5; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] = note: consider using `_y` instead [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/functions.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let x = (y = 6); // `x` has the value `()`, _NOT_ 6 [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `y` is never read [INFO] [stderr] --> src/test/functions.rs:20:14 [INFO] [stderr] | [INFO] [stderr] 20 | let x = (y = 6); // `x` has the value `()`, _NOT_ 6 [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: `x` [INFO] [stderr] --> src/test/functions.rs:22:9 [INFO] [stderr] | [INFO] [stderr] 22 | let x: i32 = diverges(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/functions.rs:23:9 [INFO] [stderr] | [INFO] [stderr] 23 | let x: String = diverges(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/test/functions.rs:28:9 [INFO] [stderr] | [INFO] [stderr] 28 | let f: fn(i32) -> i32; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/functions.rs:31:9 [INFO] [stderr] | [INFO] [stderr] 31 | let y = f(5, 6); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/test/functions.rs:34:9 [INFO] [stderr] | [INFO] [stderr] 34 | let z = sum_number(5, 6); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/data_types.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let (y, z) = (1, 2); // Binding that uses _patterns_ [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/test/data_types.rs:3:12 [INFO] [stderr] | [INFO] [stderr] 3 | let (y, z) = (1, 2); // Binding that uses _patterns_ [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `k` [INFO] [stderr] --> src/test/data_types.rs:4:8 [INFO] [stderr] | [INFO] [stderr] 4 | let k: i32 = 5; // Binding to _bind_ k to 5, with a static "int 32" type [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_k` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `xp` is never read [INFO] [stderr] --> src/test/data_types.rs:11:12 [INFO] [stderr] | [INFO] [stderr] 11 | let mut xp = 5; [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: value assigned to `a` is never read [INFO] [stderr] --> src/test/data_types.rs:32:12 [INFO] [stderr] | [INFO] [stderr] 32 | let mut a: i32 = 8; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/test/data_types.rs:34:8 [INFO] [stderr] | [INFO] [stderr] 34 | let a = a; // a is now _immutable_ and *locked* to 10 (util shadowed). [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/test/data_types.rs:37:8 [INFO] [stderr] | [INFO] [stderr] 37 | let e = 5; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/test/data_types.rs:38:8 [INFO] [stderr] | [INFO] [stderr] 38 | let e = "I am now a string!"; // e has changed types from i32 --> string [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `sum_number_three` [INFO] [stderr] --> src/test/functions.rs:9:1 [INFO] [stderr] | [INFO] [stderr] 9 | fn sum_number_three(x: i32, y: i32, z:i32) -> i32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/data_types.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let (y, z) = (1, 2); // Binding that uses _patterns_ [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/test/data_types.rs:3:12 [INFO] [stderr] | [INFO] [stderr] 3 | let (y, z) = (1, 2); // Binding that uses _patterns_ [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `k` [INFO] [stderr] --> src/test/data_types.rs:4:8 [INFO] [stderr] | [INFO] [stderr] 4 | let k: i32 = 5; // Binding to _bind_ k to 5, with a static "int 32" type [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_k` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `xp` is never read [INFO] [stderr] --> src/test/data_types.rs:11:12 [INFO] [stderr] | [INFO] [stderr] 11 | let mut xp = 5; [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: value assigned to `a` is never read [INFO] [stderr] --> src/test/data_types.rs:32:12 [INFO] [stderr] | [INFO] [stderr] 32 | let mut a: i32 = 8; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/test/data_types.rs:34:8 [INFO] [stderr] | [INFO] [stderr] 34 | let a = a; // a is now _immutable_ and *locked* to 10 (util shadowed). [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/test/data_types.rs:37:8 [INFO] [stderr] | [INFO] [stderr] 37 | let e = 5; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `e` [INFO] [stderr] --> src/test/data_types.rs:38:8 [INFO] [stderr] | [INFO] [stderr] 38 | let e = "I am now a string!"; // e has changed types from i32 --> string [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_e` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let x = true; [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: `y` [INFO] [stderr] --> src/test/primitive_types.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let y: bool = false; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:7:9 [INFO] [stderr] | [INFO] [stderr] 7 | let x = 'x'; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | let x = 42; // `x` has type `i32` [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/primitive_types.rs:11:9 [INFO] [stderr] | [INFO] [stderr] 11 | let y = 1.0; // `y` has type `f64` [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/test/primitive_types.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let a = [1, 2, 3]; // a : [i32; 3] [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `m` [INFO] [stderr] --> src/test/primitive_types.rs:20:13 [INFO] [stderr] | [INFO] [stderr] 20 | let mut m = [1, 2, 3]; // m : [i32; 3] [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_m` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `names` [INFO] [stderr] --> src/test/primitive_types.rs:25:9 [INFO] [stderr] | [INFO] [stderr] 25 | let names = ["Juspreet", "Cook", "Levin"]; // names : [&str; 3] [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_names` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b_duplicate` [INFO] [stderr] --> src/test/primitive_types.rs:30:9 [INFO] [stderr] | [INFO] [stderr] 30 | let b_duplicate = &b[..]; // A slice containing everything in `a` [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_b_duplicate` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `middle` [INFO] [stderr] --> src/test/primitive_types.rs:31:9 [INFO] [stderr] | [INFO] [stderr] 31 | let middle = &b[1..4]; // A slice of `a` : [1, 2, 3] [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_middle` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:35:9 [INFO] [stderr] | [INFO] [stderr] 35 | let x = (1, "hello"); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/primitive_types.rs:36:9 [INFO] [stderr] | [INFO] [stderr] 36 | let y: (i32, &str) = (1, "hello"); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: variable `x` is assigned to, but never used [INFO] [stderr] --> src/test/primitive_types.rs:38:13 [INFO] [stderr] | [INFO] [stderr] 38 | let mut x = (1, 2); [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_x` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `x` is never read [INFO] [stderr] --> src/test/primitive_types.rs:40:5 [INFO] [stderr] | [INFO] [stderr] 40 | x = y; // A tuple is assigned to another (mutable) tuple, and type-check => The same Product-Type [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: `a` [INFO] [stderr] --> src/test/primitive_types.rs:46:9 [INFO] [stderr] | [INFO] [stderr] 46 | let a = (0,); // Tuple of arity 1 [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/test/primitive_types.rs:47:9 [INFO] [stderr] | [INFO] [stderr] 47 | let b = (0); // Normal zero [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:52:9 [INFO] [stderr] | [INFO] [stderr] 52 | let x = tuple.0; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/primitive_types.rs:53:9 [INFO] [stderr] | [INFO] [stderr] 53 | let y = tuple.1; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/test/primitive_types.rs:54:9 [INFO] [stderr] | [INFO] [stderr] 54 | let z = tuple.2; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/test/primitive_types.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let mut m = [1, 2, 3]; // m : [i32; 3] [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: unnecessary parentheses around assigned value [INFO] [stderr] --> src/test/primitive_types.rs:47:13 [INFO] [stderr] | [INFO] [stderr] 47 | let b = (0); // Normal zero [INFO] [stderr] | ^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_parens)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:3:9 [INFO] [stderr] | [INFO] [stderr] 3 | let x = true; [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: `y` [INFO] [stderr] --> src/test/primitive_types.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let y: bool = false; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:7:9 [INFO] [stderr] | [INFO] [stderr] 7 | let x = 'x'; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | let x = 42; // `x` has type `i32` [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/primitive_types.rs:11:9 [INFO] [stderr] | [INFO] [stderr] 11 | let y = 1.0; // `y` has type `f64` [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/test/primitive_types.rs:19:9 [INFO] [stderr] | [INFO] [stderr] 19 | let a = [1, 2, 3]; // a : [i32; 3] [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `m` [INFO] [stderr] --> src/test/primitive_types.rs:20:13 [INFO] [stderr] | [INFO] [stderr] 20 | let mut m = [1, 2, 3]; // m : [i32; 3] [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_m` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `names` [INFO] [stderr] --> src/test/primitive_types.rs:25:9 [INFO] [stderr] | [INFO] [stderr] 25 | let names = ["Juspreet", "Cook", "Levin"]; // names : [&str; 3] [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_names` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b_duplicate` [INFO] [stderr] --> src/test/primitive_types.rs:30:9 [INFO] [stderr] | [INFO] [stderr] 30 | let b_duplicate = &b[..]; // A slice containing everything in `a` [INFO] [stderr] | ^^^^^^^^^^^ help: consider prefixing with an underscore: `_b_duplicate` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `middle` [INFO] [stderr] --> src/test/primitive_types.rs:31:9 [INFO] [stderr] | [INFO] [stderr] 31 | let middle = &b[1..4]; // A slice of `a` : [1, 2, 3] [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_middle` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:35:9 [INFO] [stderr] | [INFO] [stderr] 35 | let x = (1, "hello"); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/primitive_types.rs:36:9 [INFO] [stderr] | [INFO] [stderr] 36 | let y: (i32, &str) = (1, "hello"); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: variable `x` is assigned to, but never used [INFO] [stderr] --> src/test/primitive_types.rs:38:13 [INFO] [stderr] | [INFO] [stderr] 38 | let mut x = (1, 2); [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_x` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `x` is never read [INFO] [stderr] --> src/test/primitive_types.rs:40:5 [INFO] [stderr] | [INFO] [stderr] 40 | x = y; // A tuple is assigned to another (mutable) tuple, and type-check => The same Product-Type [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: `a` [INFO] [stderr] --> src/test/primitive_types.rs:46:9 [INFO] [stderr] | [INFO] [stderr] 46 | let a = (0,); // Tuple of arity 1 [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/test/primitive_types.rs:47:9 [INFO] [stderr] | [INFO] [stderr] 47 | let b = (0); // Normal zero [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_b` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/primitive_types.rs:52:9 [INFO] [stderr] | [INFO] [stderr] 52 | let x = tuple.0; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/primitive_types.rs:53:9 [INFO] [stderr] | [INFO] [stderr] 53 | let y = tuple.1; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/test/primitive_types.rs:54:9 [INFO] [stderr] | [INFO] [stderr] 54 | let z = tuple.2; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/vectors.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | let x = Box::new(5); // This is closer to the Type-Theoretic defn of `List` := Nil | Cons(T, Box(List)) [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: variable does not need to be mutable [INFO] [stderr] --> src/test/primitive_types.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let mut m = [1, 2, 3]; // m : [i32; 3] [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: `foo` [INFO] [stderr] --> src/test/primitive_types.rs:57:5 [INFO] [stderr] | [INFO] [stderr] 57 | fn foo(x: i32) -> i32 { x } // foo : i32 -> i32 [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `two_foo` [INFO] [stderr] --> src/test/primitive_types.rs:59:5 [INFO] [stderr] | [INFO] [stderr] 59 | fn two_foo(x: i32, y: i32) -> i32 { x + y } // two_foo : (i32 * i32) -> i32 [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around assigned value [INFO] [stderr] --> src/test/functions.rs:20:13 [INFO] [stderr] | [INFO] [stderr] 20 | let x = (y = 6); // `x` has the value `()`, _NOT_ 6 [INFO] [stderr] | ^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_parens)] on by default [INFO] [stderr] [INFO] [stderr] warning: unreachable statement [INFO] [stderr] --> src/test/functions.rs:23:5 [INFO] [stderr] | [INFO] [stderr] 23 | let x: String = diverges(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unreachable_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: variable `y` is assigned to, but never used [INFO] [stderr] --> src/test/functions.rs:19:13 [INFO] [stderr] | [INFO] [stderr] 19 | let mut y = 5; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] = note: consider using `_y` instead [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/functions.rs:20:9 [INFO] [stderr] | [INFO] [stderr] 20 | let x = (y = 6); // `x` has the value `()`, _NOT_ 6 [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `y` is never read [INFO] [stderr] --> src/test/functions.rs:20:14 [INFO] [stderr] | [INFO] [stderr] 20 | let x = (y = 6); // `x` has the value `()`, _NOT_ 6 [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: `x` [INFO] [stderr] --> src/test/functions.rs:22:9 [INFO] [stderr] | [INFO] [stderr] 22 | let x: i32 = diverges(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/test/functions.rs:23:9 [INFO] [stderr] | [INFO] [stderr] 23 | let x: String = diverges(); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `f` [INFO] [stderr] --> src/test/functions.rs:28:9 [INFO] [stderr] | [INFO] [stderr] 28 | let f: fn(i32) -> i32; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_f` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/test/functions.rs:31:9 [INFO] [stderr] | [INFO] [stderr] 31 | let y = f(5, 6); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/test/functions.rs:34:9 [INFO] [stderr] | [INFO] [stderr] 34 | let z = sum_number(5, 6); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `sum_number_three` [INFO] [stderr] --> src/test/functions.rs:9:1 [INFO] [stderr] | [INFO] [stderr] 9 | fn sum_number_three(x: i32, y: i32, z:i32) -> i32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.67s [INFO] running `"docker" "inspect" "4c68559ee87592645dffc04e8c24fb6bb390a4433977eeacc86cade2ceda6ab0"` [INFO] running `"docker" "rm" "-f" "4c68559ee87592645dffc04e8c24fb6bb390a4433977eeacc86cade2ceda6ab0"` [INFO] [stdout] 4c68559ee87592645dffc04e8c24fb6bb390a4433977eeacc86cade2ceda6ab0