[INFO] cloning repository https://github.com/joefttm/rust-by-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joefttm/rust-by-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoefttm%2Frust-by-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoefttm%2Frust-by-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a8c6eb292706617bad855ca29e8c83fe87cdf9e
[INFO] checking joefttm/rust-by-example against master#b2728d5426bab1d8c39709768c7e22b7f66dde5d for pr-135852
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoefttm%2Frust-by-example" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/joefttm/rust-by-example on toolchain b2728d5426bab1d8c39709768c7e22b7f66dde5d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/joefttm/rust-by-example
[INFO] finished tweaking git repo https://github.com/joefttm/rust-by-example
[INFO] tweaked toml for git repo https://github.com/joefttm/rust-by-example written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/joefttm/rust-by-example 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" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87495695f7fa8fa2c429d8f934cffe41b24e18542bafe995563e66610a6e106e
[INFO] running `Command { std: "docker" "start" "-a" "87495695f7fa8fa2c429d8f934cffe41b24e18542bafe995563e66610a6e106e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87495695f7fa8fa2c429d8f934cffe41b24e18542bafe995563e66610a6e106e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87495695f7fa8fa2c429d8f934cffe41b24e18542bafe995563e66610a6e106e", kill_on_drop: false }`
[INFO] [stdout] 87495695f7fa8fa2c429d8f934cffe41b24e18542bafe995563e66610a6e106e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6defb8a96129bc301735ac0dfa22390bf763ced1ea57bc51cb19d38b5c5c1886
[INFO] running `Command { std: "docker" "start" "-a" "6defb8a96129bc301735ac0dfa22390bf763ced1ea57bc51cb19d38b5c5c1886", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-by-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt::Error`
[INFO] [stdout]  --> src/custom.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Error`
[INFO] [stdout]  --> src/custom.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_edge`
[INFO] [stdout]    --> src/custom.rs:111:19
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let Point {x: left_edge, y: top_edge} = point;
[INFO] [stdout]     |                   ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_edge`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `top_edge`
[INFO] [stdout]    --> src/custom.rs:111:33
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let Point {x: left_edge, y: top_edge} = point;
[INFO] [stdout]     |                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_top_edge`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/custom.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let a = [1,2,6];
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_edge`
[INFO] [stdout]    --> src/custom.rs:111:19
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let Point {x: left_edge, y: top_edge} = point;
[INFO] [stdout]     |                   ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_edge`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `top_edge`
[INFO] [stdout]    --> src/custom.rs:111:33
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let Point {x: left_edge, y: top_edge} = point;
[INFO] [stdout]     |                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_top_edge`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/custom.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     let a = [1,2,6];
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]  --> src/hello.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct List(Vec<i32>);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/hello.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Color {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `joe_format_print` is never used
[INFO] [stdout]   --> src/hello.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn joe_format_print() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Matrix` is never constructed
[INFO] [stdout]  --> src/primitives.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Matrix(f32, f32, f32, f32);
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `transpose` is never used
[INFO] [stdout]   --> src/primitives.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn transpose(matrix: &mut Matrix) -> &Matrix {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `joe_test_primitive` is never used
[INFO] [stdout]   --> src/primitives.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn joe_test_primitive() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> src/custom.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point {
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 5 |     x: f32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 6 |     y: f32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `rect_area` are never used
[INFO] [stdout]   --> src/custom.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 16 |     // note: use static lifetime here
[INFO] [stdout] 17 |     pub fn new(x1: f32, y1: f32, x2: f32 ,y2 : f32) -> Result<Rectangle, &'static str> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn rect_area(&self) -> f32 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `WebEvent` is never used
[INFO] [stdout]   --> src/custom.rs:36:6
[INFO] [stdout]    |
[INFO] [stdout] 36 | enum WebEvent {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `inspect` is never used
[INFO] [stdout]   --> src/custom.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn inspect(event: WebEvent) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/custom.rs:59:6
[INFO] [stdout]    |
[INFO] [stdout] 59 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]   --> src/custom.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | impl List {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 65 |     fn new() -> List {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 70 |     fn prepend(self, element: u32) -> List {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn len(&self) -> u32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     fn stringify(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `joe_test_custom_type` is never used
[INFO] [stdout]   --> src/custom.rs:96:8
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub fn joe_test_custom_type() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]  --> src/hello.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct List(Vec<i32>);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/hello.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Color {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `joe_format_print` is never used
[INFO] [stdout]   --> src/hello.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn joe_format_print() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Matrix` is never constructed
[INFO] [stdout]  --> src/primitives.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Matrix(f32, f32, f32, f32);
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `transpose` is never used
[INFO] [stdout]   --> src/primitives.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn transpose(matrix: &mut Matrix) -> &Matrix {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `joe_test_primitive` is never used
[INFO] [stdout]   --> src/primitives.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn joe_test_primitive() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> src/custom.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point {
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 5 |     x: f32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 6 |     y: f32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `rect_area` are never used
[INFO] [stdout]   --> src/custom.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 16 |     // note: use static lifetime here
[INFO] [stdout] 17 |     pub fn new(x1: f32, y1: f32, x2: f32 ,y2 : f32) -> Result<Rectangle, &'static str> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn rect_area(&self) -> f32 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `WebEvent` is never used
[INFO] [stdout]   --> src/custom.rs:36:6
[INFO] [stdout]    |
[INFO] [stdout] 36 | enum WebEvent {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `inspect` is never used
[INFO] [stdout]   --> src/custom.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn inspect(event: WebEvent) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/custom.rs:59:6
[INFO] [stdout]    |
[INFO] [stdout] 59 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]   --> src/custom.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | impl List {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 65 |     fn new() -> List {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 70 |     fn prepend(self, element: u32) -> List {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn len(&self) -> u32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     fn stringify(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `joe_test_custom_type` is never used
[INFO] [stdout]   --> src/custom.rs:96:8
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub fn joe_test_custom_type() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "6defb8a96129bc301735ac0dfa22390bf763ced1ea57bc51cb19d38b5c5c1886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6defb8a96129bc301735ac0dfa22390bf763ced1ea57bc51cb19d38b5c5c1886", kill_on_drop: false }`
[INFO] [stdout] 6defb8a96129bc301735ac0dfa22390bf763ced1ea57bc51cb19d38b5c5c1886