[INFO] cloning repository https://github.com/mynameisnotdave/rust-tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mynameisnotdave/rust-tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmynameisnotdave%2Frust-tutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmynameisnotdave%2Frust-tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9563fc0fe60e5cb3af7da4a147513b26c215ff32
[INFO] checking mynameisnotdave/rust-tutorial against try#f3d95de532264a1215023baa665c0028aecf74b1 for pr-148477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmynameisnotdave%2Frust-tutorial" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mynameisnotdave/rust-tutorial
[INFO] finished tweaking git repo https://github.com/mynameisnotdave/rust-tutorial
[INFO] tweaked toml for git repo https://github.com/mynameisnotdave/rust-tutorial written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mynameisnotdave/rust-tutorial on toolchain f3d95de532264a1215023baa665c0028aecf74b1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3d95de532264a1215023baa665c0028aecf74b1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mynameisnotdave/rust-tutorial already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3d95de532264a1215023baa665c0028aecf74b1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+f3d95de532264a1215023baa665c0028aecf74b1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73377d36612e3e9897fd9584f21669405fd42dcf371a1ba1b4f818a441afe44e
[INFO] running `Command { std: "docker" "start" "-a" "73377d36612e3e9897fd9584f21669405fd42dcf371a1ba1b4f818a441afe44e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73377d36612e3e9897fd9584f21669405fd42dcf371a1ba1b4f818a441afe44e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73377d36612e3e9897fd9584f21669405fd42dcf371a1ba1b4f818a441afe44e", kill_on_drop: false }`
[INFO] [stdout] 73377d36612e3e9897fd9584f21669405fd42dcf371a1ba1b4f818a441afe44e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+f3d95de532264a1215023baa665c0028aecf74b1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90af781c5ecbbbafa403648ff6f4c6baf284e0fcb8b571b86fd76db17a39a876
[INFO] running `Command { std: "docker" "start" "-a" "90af781c5ecbbbafa403648ff6f4c6baf284e0fcb8b571b86fd76db17a39a876", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/flow_control.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |         'inner2: loop {
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/flow_control.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |         'inner2: loop {
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::result`
[INFO] [stdout]  --> src/result.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type parameter `i32` should have an upper camel case name
[INFO] [stdout]   --> src/result.rs:75:10
[INFO] [stdout]    |
[INFO] [stdout] 75 | type Res<i32> = Result<i32, ParseIntError>;
[INFO] [stdout]    |          ^^^ help: convert the identifier to upper camel case (notice the capitalization): `I32`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::result`
[INFO] [stdout]  --> src/result.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type parameter `i32` should have an upper camel case name
[INFO] [stdout]   --> src/result.rs:75:10
[INFO] [stdout]    |
[INFO] [stdout] 75 | type Res<i32> = Result<i32, ParseIntError>;
[INFO] [stdout]    |          ^^^ help: convert the identifier to upper camel case (notice the capitalization): `I32`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]   --> src/tuple_examples.rs:43:10
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (x, y, z);
[INFO] [stdout]    |          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_x` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `y` is assigned to, but never used
[INFO] [stdout]   --> src/tuple_examples.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (x, y, z);
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_y` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `z` is assigned to, but never used
[INFO] [stdout]   --> src/tuple_examples.rs:43:16
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (x, y, z);
[INFO] [stdout]    |                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_z` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]   --> src/tuple_examples.rs:43:10
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (x, y, z);
[INFO] [stdout]    |          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_x` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/tuple_examples.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     (y, z, x) = (1, 2, 3);
[INFO] [stdout]    |            ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `y` is assigned to, but never used
[INFO] [stdout]   --> src/tuple_examples.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (x, y, z);
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_y` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/tuple_examples.rs:45:6
[INFO] [stdout]    |
[INFO] [stdout] 45 |     (y, z, x) = (1, 2, 3);
[INFO] [stdout]    |      ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `z` is never read
[INFO] [stdout]   --> src/tuple_examples.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     (y, z, x) = (1, 2, 3);
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `z` is assigned to, but never used
[INFO] [stdout]   --> src/tuple_examples.rs:43:16
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let (x, y, z);
[INFO] [stdout]    |                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_z` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/tuple_examples.rs:50:10
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let (x, y): (i32, i32) = sum_multiply((2, 3));
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/tuple_examples.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     (y, z, x) = (1, 2, 3);
[INFO] [stdout]    |            ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]   --> src/tuple_examples.rs:45:6
[INFO] [stdout]    |
[INFO] [stdout] 45 |     (y, z, x) = (1, 2, 3);
[INFO] [stdout]    |      ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/tuple_examples.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let (x, y): (i32, i32) = sum_multiply((2, 3));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `z` is never read
[INFO] [stdout]   --> src/tuple_examples.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     (y, z, x) = (1, 2, 3);
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user2`
[INFO] [stdout]   --> src/structs.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let user2 = User {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/tuple_examples.rs:50:10
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let (x, y): (i32, i32) = sum_multiply((2, 3));
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/tuple_examples.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let (x, y): (i32, i32) = sum_multiply((2, 3));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user2`
[INFO] [stdout]   --> src/structs.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let user2 = User {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `black`
[INFO] [stdout]   --> src/structs.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let black = Colour(0,0,0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> src/structs.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let origin = Point(0,0,0);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `black`
[INFO] [stdout]   --> src/structs.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let black = Colour(0,0,0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/structs.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let p = Person {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> src/structs.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let origin = Point(0,0,0);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/structs.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let p = Person {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]  --> src/enums.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let home: IpAddr = IpAddr::V4(String::from("127.0.0.1"));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]  --> src/enums.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let loopback: IpAddr = IpAddr::V6(String::from("::1"));
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]  --> src/enums.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let home: IpAddr = IpAddr::V4(String::from("127.0.0.1"));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]  --> src/enums.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let loopback: IpAddr = IpAddr::V6(String::from("::1"));
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg1`
[INFO] [stdout]   --> src/enums.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let msg1 = Message::Move { x: (3), y: (4) };
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_msg1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg2`
[INFO] [stdout]   --> src/enums.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let msg2 = Message::Write(String::from("hello world"));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_msg2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg1`
[INFO] [stdout]   --> src/enums.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let msg1 = Message::Move { x: (3), y: (4) };
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_msg1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg2`
[INFO] [stdout]   --> src/enums.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let msg2 = Message::Write(String::from("hello world"));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_msg2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/flow_control.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     for i in 0..=100 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/flow_control.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     for i in 0..=100 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `binary`
[INFO] [stdout]   --> src/pattern_match.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let binary: i32 = match boolean {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_binary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `binary`
[INFO] [stdout]   --> src/pattern_match.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let binary: i32 = match boolean {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_binary`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rec1`
[INFO] [stdout]   --> src/methods.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let rec1: Rectangle = Rectangle::new(5, 10);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_rec1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rec1`
[INFO] [stdout]   --> src/methods.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let rec1: Rectangle = Rectangle::new(5, 10);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_rec1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/generics.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let x: Point<i32> = Point{x: 4, y: 8};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/generics.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let x: Point<i32> = Point{x: 4, y: 8};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/generics.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let p: TwoTypedPoint<i32, String> = TwoTypedPoint{x: 5, y: "hello".to_string()};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p3`
[INFO] [stdout]   --> src/generics.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let p3: TwoTypedPoint<i32, char> = p1.mixup(p2);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_p3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/generics.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let p: TwoTypedPoint<i32, String> = TwoTypedPoint{x: 5, y: "hello".to_string()};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p3`
[INFO] [stdout]   --> src/generics.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let p3: TwoTypedPoint<i32, char> = p1.mixup(p2);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_p3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/vector.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let v: Vec<u8> = Vec::from(arr);
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/vector.rs:29:11
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn is_vec(v: Vec<u8>) {}
[INFO] [stdout]    |           ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]  --> src/vector.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let v: Vec<u8> = Vec::from(arr);
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/vector.rs:29:11
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn is_vec(v: Vec<u8>) {}
[INFO] [stdout]    |           ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/vector.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 148 |     let v: Vec<IpAddr> = vec![
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/vector.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 148 |     let v: Vec<IpAddr> = vec![
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1`
[INFO] [stdout]   --> src/typecoercion.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let c1: char = decimal as u8 as char;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]   --> src/typecoercion.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let c2 = integer as char; // 97 = a
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/typecoercion.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let v: u8 = 1000 as u8;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1`
[INFO] [stdout]   --> src/typecoercion.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let c1: char = decimal as u8 as char;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]   --> src/typecoercion.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let c2 = integer as char; // 97 = a
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/typecoercion.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let v: u8 = 1000 as u8;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0597]: `x` does not live long enough
[INFO] [stdout]   --> src/lifetimes.rs:9:13
[INFO] [stdout]    |
[INFO] [stdout]  8 |         let x = 5;
[INFO] [stdout]    |             - binding `x` declared here
[INFO] [stdout]  9 |         r = &x;
[INFO] [stdout]    |             ^^ borrowed value does not live long enough
[INFO] [stdout] 10 |     }
[INFO] [stdout]    |     - `x` dropped here while still borrowed
[INFO] [stdout] 11 |
[INFO] [stdout] 12 |     println!("r: {}", r);
[INFO] [stdout]    |                       - borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0597]: `x` does not live long enough
[INFO] [stdout]   --> src/lifetimes.rs:9:13
[INFO] [stdout]    |
[INFO] [stdout]  8 |         let x = 5;
[INFO] [stdout]    |             - binding `x` declared here
[INFO] [stdout]  9 |         r = &x;
[INFO] [stdout]    |             ^^ borrowed value does not live long enough
[INFO] [stdout] 10 |     }
[INFO] [stdout]    |     - `x` dropped here while still borrowed
[INFO] [stdout] 11 |
[INFO] [stdout] 12 |     println!("r: {}", r);
[INFO] [stdout]    |                       - borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: lifetime may not live long enough
[INFO] [stdout]   --> src/lifetimes.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn pass_x<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout]    |           --  -- lifetime `'b` defined here
[INFO] [stdout]    |           |
[INFO] [stdout]    |           lifetime `'a` defined here
[INFO] [stdout] 27 |     y
[INFO] [stdout]    |     ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding the following bound: `'b: 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: lifetime may not live long enough
[INFO] [stdout]   --> src/lifetimes.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn pass_x<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout]    |           --  -- lifetime `'b` defined here
[INFO] [stdout]    |           |
[INFO] [stdout]    |           lifetime `'a` defined here
[INFO] [stdout] 27 |     y
[INFO] [stdout]    |     ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding the following bound: `'b: 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lifetimes.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn pass_x<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lifetimes.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn pass_x<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lifetimes.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let x: &str = "long";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lifetimes.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let x: &str = "long";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/lifetimes.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let y: &str = "longer";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/lifetimes.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let y: &str = "longer";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0597`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0597`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-tutorial` (bin "rust-tutorial") due to 2 previous errors; 34 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rust-tutorial` (bin "rust-tutorial" test) due to 2 previous errors; 34 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "90af781c5ecbbbafa403648ff6f4c6baf284e0fcb8b571b86fd76db17a39a876", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90af781c5ecbbbafa403648ff6f4c6baf284e0fcb8b571b86fd76db17a39a876", kill_on_drop: false }`
[INFO] [stdout] 90af781c5ecbbbafa403648ff6f4c6baf284e0fcb8b571b86fd76db17a39a876