[INFO] updating cached repository https://github.com/Little-Captain/dive-into-rust-of-fcc [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] 74cd130b2740ee72d9fecd980fd9e1914f98af75 [INFO] checking Little-Captain/dive-into-rust-of-fcc against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLittle-Captain%2Fdive-into-rust-of-fcc" "/workspace/builds/worker-6/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Little-Captain/dive-into-rust-of-fcc on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d [INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/Little-Captain/dive-into-rust-of-fcc [INFO] finished tweaking git repo https://github.com/Little-Captain/dive-into-rust-of-fcc [INFO] tweaked toml for git repo https://github.com/Little-Captain/dive-into-rust-of-fcc written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/Little-Captain/dive-into-rust-of-fcc already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 85f501333dc58833eeee90103dadbde92451c432bfb723c935b122b7ff14c32c [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `"docker" "start" "-a" "85f501333dc58833eeee90103dadbde92451c432bfb723c935b122b7ff14c32c"` [INFO] [stderr] Checking dive-into-rust-of-fcc v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unnecessary parentheses around assigned value [INFO] [stderr] --> src/ch02/third.rs:11:13 [INFO] [stderr] | [INFO] [stderr] 11 | let b = (0); [INFO] [stderr] | ^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant `dog` should have an upper camel case name [INFO] [stderr] --> src/ch02/third.rs:213:9 [INFO] [stderr] | [INFO] [stderr] 213 | dog = 1, [INFO] [stderr] | ^^^ help: convert the identifier to upper camel case: `Dog` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant `cat` should have an upper camel case name [INFO] [stderr] --> src/ch02/third.rs:214:9 [INFO] [stderr] | [INFO] [stderr] 214 | cat = 200, [INFO] [stderr] | ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Cat` [INFO] [stderr] [INFO] [stderr] warning: variant `tiger` should have an upper camel case name [INFO] [stderr] --> src/ch02/third.rs:215:9 [INFO] [stderr] | [INFO] [stderr] 215 | tiger, [INFO] [stderr] | ^^^^^ help: convert the identifier to upper camel case: `Tiger` [INFO] [stderr] [INFO] [stderr] warning: unused label [INFO] [stderr] --> src/ch03/second.rs:72:13 [INFO] [stderr] | [INFO] [stderr] 72 | 'b: loop { [INFO] [stderr] | ^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_labels)]` on by default [INFO] [stderr] [INFO] [stderr] warning: the item `Iterator` is imported redundantly [INFO] [stderr] --> src/ch06/first.rs:225:9 [INFO] [stderr] | [INFO] [stderr] 225 | use std::iter::Iterator; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around assigned value [INFO] [stderr] --> src/ch02/third.rs:11:13 [INFO] [stderr] | [INFO] [stderr] 11 | let b = (0); [INFO] [stderr] | ^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant `dog` should have an upper camel case name [INFO] [stderr] --> src/ch02/third.rs:213:9 [INFO] [stderr] | [INFO] [stderr] 213 | dog = 1, [INFO] [stderr] | ^^^ help: convert the identifier to upper camel case: `Dog` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant `cat` should have an upper camel case name [INFO] [stderr] --> src/ch02/third.rs:214:9 [INFO] [stderr] | [INFO] [stderr] 214 | cat = 200, [INFO] [stderr] | ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Cat` [INFO] [stderr] [INFO] [stderr] warning: variant `tiger` should have an upper camel case name [INFO] [stderr] --> src/ch02/third.rs:215:9 [INFO] [stderr] | [INFO] [stderr] 215 | tiger, [INFO] [stderr] | ^^^^^ help: convert the identifier to upper camel case: `Tiger` [INFO] [stderr] [INFO] [stderr] warning: unused label [INFO] [stderr] --> src/ch03/second.rs:72:13 [INFO] [stderr] | [INFO] [stderr] 72 | 'b: loop { [INFO] [stderr] | ^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_labels)]` on by default [INFO] [stderr] [INFO] [stderr] warning: the item `Iterator` is imported redundantly [INFO] [stderr] --> src/ch06/first.rs:225:9 [INFO] [stderr] | [INFO] [stderr] 225 | use std::iter::Iterator; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unreachable statement [INFO] [stderr] --> src/ch04/first.rs:67:5 [INFO] [stderr] | [INFO] [stderr] 66 | let x: i32 = diverges(); [INFO] [stderr] | ---------- any code following this expression is unreachable [INFO] [stderr] 67 | let y: String = diverges(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unreachable_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: value assigned to `x` is never read [INFO] [stderr] --> src/ch02/first.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | let mut x = 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/ch02/first.rs:12:10 [INFO] [stderr] | [INFO] [stderr] 12 | let (mut a, mut b) = (1, 2); [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: value assigned to `b` is never read [INFO] [stderr] --> src/ch02/first.rs:12:17 [INFO] [stderr] | [INFO] [stderr] 12 | let (mut a, mut b) = (1, 2); [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `var2` [INFO] [stderr] --> src/ch02/second.rs:188:9 [INFO] [stderr] | [INFO] [stderr] 188 | let var2: i16 = var1 as i16; [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_var2` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/ch02/second.rs:190:9 [INFO] [stderr] | [INFO] [stderr] 190 | let a = "some string"; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `value` [INFO] [stderr] --> src/ch02/third.rs:132:11 [INFO] [stderr] | [INFO] [stderr] 132 | fn f1(value: Inches) {} [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_value` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `value` [INFO] [stderr] --> src/ch02/third.rs:133:11 [INFO] [stderr] | [INFO] [stderr] 133 | fn f2(value: i32) {} [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_value` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch02/third.rs:203:9 [INFO] [stderr] | [INFO] [stderr] 203 | let x: Message = Message::Move { x: 3, y: 4 }; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/ch02/third.rs:210:9 [INFO] [stderr] | [INFO] [stderr] 210 | let y: BoardGameTurn = BoardGameTurn::Move { squares: 1 }; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `x` is never read [INFO] [stderr] --> src/ch03/first.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let mut x: i32 = 1; [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: variable `func` is assigned to, but never used [INFO] [stderr] --> src/ch04/first.rs:27:9 [INFO] [stderr] | [INFO] [stderr] 27 | let mut func: fn((i32, i32)) -> i32 = add1; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_func` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `func` is never read [INFO] [stderr] --> src/ch04/first.rs:28:5 [INFO] [stderr] | [INFO] [stderr] 28 | func = add2; [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch04/first.rs:66:9 [INFO] [stderr] | [INFO] [stderr] 66 | let x: i32 = diverges(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/ch04/first.rs:67:9 [INFO] [stderr] | [INFO] [stderr] 67 | let y: String = diverges(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `p` [INFO] [stderr] --> src/ch04/first.rs:69:9 [INFO] [stderr] | [INFO] [stderr] 69 | let p = if x != 100 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_p` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/ch05/first.rs:79:9 [INFO] [stderr] | [INFO] [stderr] 79 | let c = Circle { radius: 2f64 }; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/ch05/first.rs:104:9 [INFO] [stderr] | [INFO] [stderr] 104 | let c = Circle { radius: 2f64 }; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `ys` [INFO] [stderr] --> src/ch06/first.rs:13:9 [INFO] [stderr] | [INFO] [stderr] 13 | let ys: [i32; 500] = [0; 500]; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_ys` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `xs` is never read [INFO] [stderr] --> src/ch06/first.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let mut xs: [i32; 5] = [1, 2, 3, 4, 5]; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:253:9 [INFO] [stderr] | [INFO] [stderr] 253 | let x = 5_i32; // i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:254:9 [INFO] [stderr] | [INFO] [stderr] 254 | let x = &5_i32; // &i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:255:9 [INFO] [stderr] | [INFO] [stderr] 255 | let ref x = 5_i32; // &i32 [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:257:9 [INFO] [stderr] | [INFO] [stderr] 257 | let ref x = &5_i32; // &&i32 [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `v` is never read [INFO] [stderr] --> src/ch07/second.rs:265:9 [INFO] [stderr] | [INFO] [stderr] 265 | let mut v = vec![1i32, 2, 3]; [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:277:9 [INFO] [stderr] | [INFO] [stderr] 277 | let mut x: &mut i32; [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unreachable statement [INFO] [stderr] --> src/ch04/first.rs:67:5 [INFO] [stderr] | [INFO] [stderr] 66 | let x: i32 = diverges(); [INFO] [stderr] | ---------- any code following this expression is unreachable [INFO] [stderr] 67 | let y: String = diverges(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unreachable_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: value assigned to `x` is never read [INFO] [stderr] --> src/ch02/first.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | let mut x = 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/ch02/first.rs:12:10 [INFO] [stderr] | [INFO] [stderr] 12 | let (mut a, mut b) = (1, 2); [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: value assigned to `b` is never read [INFO] [stderr] --> src/ch02/first.rs:12:17 [INFO] [stderr] | [INFO] [stderr] 12 | let (mut a, mut b) = (1, 2); [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `var2` [INFO] [stderr] --> src/ch02/second.rs:188:9 [INFO] [stderr] | [INFO] [stderr] 188 | let var2: i16 = var1 as i16; [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_var2` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/ch02/second.rs:190:9 [INFO] [stderr] | [INFO] [stderr] 190 | let a = "some string"; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `value` [INFO] [stderr] --> src/ch02/third.rs:132:11 [INFO] [stderr] | [INFO] [stderr] 132 | fn f1(value: Inches) {} [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_value` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `value` [INFO] [stderr] --> src/ch02/third.rs:133:11 [INFO] [stderr] | [INFO] [stderr] 133 | fn f2(value: i32) {} [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_value` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch02/third.rs:203:9 [INFO] [stderr] | [INFO] [stderr] 203 | let x: Message = Message::Move { x: 3, y: 4 }; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/ch02/third.rs:210:9 [INFO] [stderr] | [INFO] [stderr] 210 | let y: BoardGameTurn = BoardGameTurn::Move { squares: 1 }; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `x` is never read [INFO] [stderr] --> src/ch03/first.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let mut x: i32 = 1; [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: variable `func` is assigned to, but never used [INFO] [stderr] --> src/ch04/first.rs:27:9 [INFO] [stderr] | [INFO] [stderr] 27 | let mut func: fn((i32, i32)) -> i32 = add1; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_func` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `func` is never read [INFO] [stderr] --> src/ch04/first.rs:28:5 [INFO] [stderr] | [INFO] [stderr] 28 | func = add2; [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch04/first.rs:66:9 [INFO] [stderr] | [INFO] [stderr] 66 | let x: i32 = diverges(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/ch04/first.rs:67:9 [INFO] [stderr] | [INFO] [stderr] 67 | let y: String = diverges(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `p` [INFO] [stderr] --> src/ch04/first.rs:69:9 [INFO] [stderr] | [INFO] [stderr] 69 | let p = if x != 100 { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_p` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/ch05/first.rs:79:9 [INFO] [stderr] | [INFO] [stderr] 79 | let c = Circle { radius: 2f64 }; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c` [INFO] [stderr] --> src/ch05/first.rs:104:9 [INFO] [stderr] | [INFO] [stderr] 104 | let c = Circle { radius: 2f64 }; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `ys` [INFO] [stderr] --> src/ch06/first.rs:13:9 [INFO] [stderr] | [INFO] [stderr] 13 | let ys: [i32; 500] = [0; 500]; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_ys` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `xs` is never read [INFO] [stderr] --> src/ch06/first.rs:21:9 [INFO] [stderr] | [INFO] [stderr] 21 | let mut xs: [i32; 5] = [1, 2, 3, 4, 5]; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:253:9 [INFO] [stderr] | [INFO] [stderr] 253 | let x = 5_i32; // i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:254:9 [INFO] [stderr] | [INFO] [stderr] 254 | let x = &5_i32; // &i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:255:9 [INFO] [stderr] | [INFO] [stderr] 255 | let ref x = 5_i32; // &i32 [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:257:9 [INFO] [stderr] | [INFO] [stderr] 257 | let ref x = &5_i32; // &&i32 [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `v` is never read [INFO] [stderr] --> src/ch07/second.rs:265:9 [INFO] [stderr] | [INFO] [stderr] 265 | let mut v = vec![1i32, 2, 3]; [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/ch07/second.rs:277:9 [INFO] [stderr] | [INFO] [stderr] 277 | let mut x: &mut i32; [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: 32 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: 32 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.12s [INFO] running `"docker" "inspect" "85f501333dc58833eeee90103dadbde92451c432bfb723c935b122b7ff14c32c"` [INFO] running `"docker" "rm" "-f" "85f501333dc58833eeee90103dadbde92451c432bfb723c935b122b7ff14c32c"` [INFO] [stdout] 85f501333dc58833eeee90103dadbde92451c432bfb723c935b122b7ff14c32c