[INFO] cloning repository https://github.com/D-lyw/rust-demos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/D-lyw/rust-demos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FD-lyw%2Frust-demos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FD-lyw%2Frust-demos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68af192459ca7192da8b11d139516fb7aa7c7797
[INFO] testing D-lyw/rust-demos against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FD-lyw%2Frust-demos" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/D-lyw/rust-demos on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/D-lyw/rust-demos
[INFO] finished tweaking git repo https://github.com/D-lyw/rust-demos
[INFO] tweaked toml for git repo https://github.com/D-lyw/rust-demos written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/D-lyw/rust-demos 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" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-5-tc1/source/games/snake/Cargo.toml: unused manifest key: examples
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_v8 v0.183.0
[INFO] [stderr]   Downloaded prost-derive v0.12.4
[INFO] [stderr]   Downloaded polyglot_tokenizer v0.2.1
[INFO] [stderr]   Downloaded pcre2 v0.2.7
[INFO] [stderr]   Downloaded prost-build v0.12.4
[INFO] [stderr]   Downloaded sysinfo v0.30.10
[INFO] [stderr]   Downloaded pcre2-sys v0.2.9
[INFO] [stderr]   Downloaded hyperpolyglot v0.1.7
[INFO] [stderr]   Downloaded v8 v0.89.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92eae22a4a6214d3c53ca3878b4d4b782ad2c6f9161d079dcf939d98064641bc
[INFO] running `Command { std: "docker" "start" "-a" "92eae22a4a6214d3c53ca3878b4d4b782ad2c6f9161d079dcf939d98064641bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92eae22a4a6214d3c53ca3878b4d4b782ad2c6f9161d079dcf939d98064641bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92eae22a4a6214d3c53ca3878b4d4b782ad2c6f9161d079dcf939d98064641bc", kill_on_drop: false }`
[INFO] [stdout] 92eae22a4a6214d3c53ca3878b4d4b782ad2c6f9161d079dcf939d98064641bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8eb80cddc386779ec81be0233a16a59c3ed27bc14054ca9c5a37c97764ff6a88
[INFO] running `Command { std: "docker" "start" "-a" "8eb80cddc386779ec81be0233a16a59c3ed27bc14054ca9c5a37c97764ff6a88", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/games/snake/Cargo.toml: unused manifest key: examples
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling pin-project-lite v0.2.14
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling bytes v1.6.0
[INFO] [stderr]    Compiling log v0.4.21
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling cc v1.0.92
[INFO] [stderr]    Compiling serde v1.0.198
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling futures-task v0.3.30
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling openssl v0.10.64
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling bitflags v2.5.0
[INFO] [stderr]    Compiling try-lock v0.2.5
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling http v1.1.0
[INFO] [stderr]    Compiling ryu v1.0.17
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]    Compiling want v0.3.1
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling tower-service v0.3.2
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling tower-layer v0.3.2
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling socket2 v0.5.6
[INFO] [stderr]    Compiling mio v0.8.11
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling openssl-sys v0.9.102
[INFO] [stderr]    Compiling http-body v1.0.0
[INFO] [stderr]    Compiling getrandom v0.2.14
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.23
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling iana-time-zone v0.1.60
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling chrono v0.4.37
[INFO] [stderr]    Compiling http-body-util v0.1.1
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling tracing-log v0.1.4
[INFO] [stderr]    Compiling thread_local v1.1.8
[INFO] [stderr]    Compiling rustls-pki-types v1.4.1
[INFO] [stderr]    Compiling base64 v0.22.0
[INFO] [stderr]    Compiling idna v0.5.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling num-iter v0.1.44
[INFO] [stderr]    Compiling rustls-pemfile v2.1.2
[INFO] [stderr]    Compiling num-complex v0.4.5
[INFO] [stderr]    Compiling atoi v0.3.3
[INFO] [stderr]    Compiling encoding_rs v0.8.34
[INFO] [stderr]    Compiling url v2.5.0
[INFO] [stderr]    Compiling mime v0.3.17
[INFO] [stderr]    Compiling sync_wrapper v0.1.2
[INFO] [stderr]    Compiling ipnet v2.9.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling server v0.1.0 (/opt/rustwide/workdir/server)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> server/src/lib.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut prefix = String::from("My name is: ");
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling serde_derive v1.0.198
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]    Compiling async-stream v0.3.5
[INFO] [stderr]    Compiling tokio v1.37.0
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling pin-project v1.1.5
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling tokio-util v0.7.10
[INFO] [stderr]    Compiling tower v0.4.13
[INFO] [stderr]    Compiling tokio-native-tls v0.3.1
[INFO] [stderr]    Compiling tokio-stream v0.1.15
[INFO] [stderr]    Compiling tracing-serde v0.1.3
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling h2 v0.4.4
[INFO] [stderr]    Compiling tracing-subscriber v0.2.25
[INFO] [stderr]    Compiling mini-redis v0.4.1
[INFO] [stderr]    Compiling hyper v1.2.0
[INFO] [stderr]    Compiling hyper-util v0.1.3
[INFO] [stderr]    Compiling hyper-tls v0.6.0
[INFO] [stderr]    Compiling reqwest v0.12.3
[INFO] [stderr]    Compiling rust-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:160:12
[INFO] [stdout]     |
[INFO] [stdout] 160 |         if (count == 3) {
[INFO] [stdout]     |            ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 160 -         if (count == 3) {
[INFO] [stdout] 160 +         if count == 3 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |         if (count == 10) {
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 164 -         if (count == 10) {
[INFO] [stdout] 164 +         if count == 10 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:269:16
[INFO] [stdout]     |
[INFO] [stdout] 269 |             if (current > 100) {
[INFO] [stdout]     |                ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 269 -             if (current > 100) {
[INFO] [stdout] 269 +             if current > 100 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/smart_pointer.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `server::show_name`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use server::show_name;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `enum_usage`, `init_val`, `print_min_width`, `val_shadowing`
[INFO] [stdout]   --> src/main.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 | ...{arrays_slices, enum_usage, init_val, macro_usage, ownership_move, print_min_width, string_num_convert, val_shadowing, vector_usage};
[INFO] [stdout]    |                    ^^^^^^^^^^  ^^^^^^^^                               ^^^^^^^^^^^^^^^                      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |         if (line.contains("println")) {
[INFO] [stdout]    |            ^                        ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 97 -         if (line.contains("println")) {
[INFO] [stdout] 97 +         if line.contains("println") {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:137:29
[INFO] [stdout]     |
[INFO] [stdout] 137 |             let x_percent = (img_x as f64 / width as f64);
[INFO] [stdout]     |                             ^                           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 137 -             let x_percent = (img_x as f64 / width as f64);
[INFO] [stdout] 137 +             let x_percent = img_x as f64 / width as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:138:29
[INFO] [stdout]     |
[INFO] [stdout] 138 |             let y_percent = (img_y as f64 / height as f64);
[INFO] [stdout]     |                             ^                            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -             let y_percent = (img_y as f64 / height as f64);
[INFO] [stdout] 138 +             let y_percent = img_y as f64 / height as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/basic.rs:231:22
[INFO] [stdout]     |
[INFO] [stdout] 231 |         fn add(self, rhs: Bar) -> Self::Output {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/basic.rs:239:22
[INFO] [stdout]     |
[INFO] [stdout] 239 |         fn add(self, rhs: Foo) -> Self::Output {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/smart_pointer.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let b = *a + 1;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/thread.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let s = Instant::now();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/thread.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     for i in 0..N_THREADS {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/main.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/main.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `area` and `can_hold` are never used
[INFO] [stdout]   --> src/main.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Rectangle {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 32 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn can_hold(&self, other:&Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn read_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/main.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn add<T: Add<Output = T>>(i: T, j: T) -> T {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reporter` is never used
[INFO] [stdout]    --> src/main.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn reporter<T: Debug>(item: T) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_time` is never used
[INFO] [stdout]    --> src/main.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn count_time() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_mandelbrot` is never used
[INFO] [stdout]    --> src/main.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn calculate_mandelbrot(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mandelbrot_at_point` is never used
[INFO] [stdout]    --> src/main.rs:149:4
[INFO] [stdout]     |
[INFO] [stdout] 149 | fn mandelbrot_at_point(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `render_mandelbrot` is never used
[INFO] [stdout]    --> src/main.rs:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn render_mandelbrot(escape_vals: Vec<Vec<usize>>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_is_even` is never used
[INFO] [stdout]    --> src/main.rs:187:4
[INFO] [stdout]     |
[INFO] [stdout] 187 | fn check_is_even(num: i32) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_even` is never used
[INFO] [stdout]    --> src/main.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn is_even(num: i32) -> bool {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `show_range` is never used
[INFO] [stdout]    --> src/main.rs:199:4
[INFO] [stdout]     |
[INFO] [stdout] 199 | fn show_range() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guess_number` is never used
[INFO] [stdout]    --> src/main.rs:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | fn guess_number() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `author` and `title` are never read
[INFO] [stdout]    --> src/basic.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     struct Book {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 181 |         author: &'static str,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 182 |         title: &'static str,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_book` is never used
[INFO] [stdout]    --> src/basic.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn borrow_book(book: &Book) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `operator_overload` is never used
[INFO] [stdout]    --> src/basic.rs:211:4
[INFO] [stdout]     |
[INFO] [stdout] 211 | fn operator_overload() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `traits_iter` is never used
[INFO] [stdout]    --> src/basic.rs:248:4
[INFO] [stdout]     |
[INFO] [stdout] 248 | fn traits_iter() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/basic.rs:256:12
[INFO] [stdout]     |
[INFO] [stdout] 255 |     impl Fibonacci {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] 256 |         fn new() -> Fibonacci {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `persist`, and `load` are never used
[INFO] [stdout]   --> src/train_code.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 28 |     pub fn new(name: String, age: u32, solgan: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn persist(&self, filename: String) -> Result<usize, std::io::Error> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn load(filename: String) -> Result<Self, std::io::Error> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `remaining_ticket` is never read
[INFO] [stdout]   --> src/train_code.rs:79:5
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Museum {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 79 |     remaining_ticket: Semaphore,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_ticket`, and `avaialable_ticket` are never used
[INFO] [stdout]   --> src/train_code.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl Museum {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 83 |     fn new(max_ticket: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn get_ticket(&self) -> Option<Ticket<'_>> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 96 |     fn avaialable_ticket(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ticket` is never read
[INFO] [stdout]    --> src/train_code.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | pub struct Ticket<'a> {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 102 |     ticket: SemaphorePermit<'a>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.26s
[INFO] running `Command { std: "docker" "inspect" "8eb80cddc386779ec81be0233a16a59c3ed27bc14054ca9c5a37c97764ff6a88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eb80cddc386779ec81be0233a16a59c3ed27bc14054ca9c5a37c97764ff6a88", kill_on_drop: false }`
[INFO] [stdout] 8eb80cddc386779ec81be0233a16a59c3ed27bc14054ca9c5a37c97764ff6a88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33aececf9c932344cf3ccd4bee8ed26030196473ace4498aff4e19f97ab2444f
[INFO] running `Command { std: "docker" "start" "-a" "33aececf9c932344cf3ccd4bee8ed26030196473ace4498aff4e19f97ab2444f", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/games/snake/Cargo.toml: unused manifest key: examples
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> server/src/lib.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut prefix = String::from("My name is: ");
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:160:12
[INFO] [stdout]     |
[INFO] [stdout] 160 |         if (count == 3) {
[INFO] [stdout]     |            ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 160 -         if (count == 3) {
[INFO] [stdout] 160 +         if count == 3 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |         if (count == 10) {
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 164 -         if (count == 10) {
[INFO] [stdout] 164 +         if count == 10 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:269:16
[INFO] [stdout]     |
[INFO] [stdout] 269 |             if (current > 100) {
[INFO] [stdout]     |                ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 269 -             if (current > 100) {
[INFO] [stdout] 269 +             if current > 100 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]    --> src/train_code.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 |     use std::thread;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `server::show_name`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use server::show_name;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `enum_usage`, `init_val`, `print_min_width`, `val_shadowing`
[INFO] [stdout]   --> src/main.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 | ...{arrays_slices, enum_usage, init_val, macro_usage, ownership_move, print_min_width, string_num_convert, val_shadowing, vector_usage};
[INFO] [stdout]    |                    ^^^^^^^^^^  ^^^^^^^^                               ^^^^^^^^^^^^^^^                      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |         if (line.contains("println")) {
[INFO] [stdout]    |            ^                        ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 97 -         if (line.contains("println")) {
[INFO] [stdout] 97 +         if line.contains("println") {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:137:29
[INFO] [stdout]     |
[INFO] [stdout] 137 |             let x_percent = (img_x as f64 / width as f64);
[INFO] [stdout]     |                             ^                           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 137 -             let x_percent = (img_x as f64 / width as f64);
[INFO] [stdout] 137 +             let x_percent = img_x as f64 / width as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:138:29
[INFO] [stdout]     |
[INFO] [stdout] 138 |             let y_percent = (img_y as f64 / height as f64);
[INFO] [stdout]     |                             ^                            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -             let y_percent = (img_y as f64 / height as f64);
[INFO] [stdout] 138 +             let y_percent = img_y as f64 / height as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/basic.rs:231:22
[INFO] [stdout]     |
[INFO] [stdout] 231 |         fn add(self, rhs: Bar) -> Self::Output {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/basic.rs:239:22
[INFO] [stdout]     |
[INFO] [stdout] 239 |         fn add(self, rhs: Foo) -> Self::Output {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ticket_lists`
[INFO] [stdout]    --> src/train_code.rs:191:12
[INFO] [stdout]     |
[INFO] [stdout] 191 |        let ticket_lists: Vec<Ticket> = (0..10).map(|i| museum.get_ticket().unwrap()).collect();
[INFO] [stdout]     |            ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ticket_lists`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/train_code.rs:191:53
[INFO] [stdout]     |
[INFO] [stdout] 191 |        let ticket_lists: Vec<Ticket> = (0..10).map(|i| museum.get_ticket().unwrap()).collect();
[INFO] [stdout]     |                                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/smart_pointer.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let b = *a + 1;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/thread.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let s = Instant::now();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/thread.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     for i in 0..N_THREADS {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/main.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/main.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `area` and `can_hold` are never used
[INFO] [stdout]   --> src/main.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Rectangle {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 32 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn can_hold(&self, other:&Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn read_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/main.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn add<T: Add<Output = T>>(i: T, j: T) -> T {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reporter` is never used
[INFO] [stdout]    --> src/main.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn reporter<T: Debug>(item: T) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_time` is never used
[INFO] [stdout]    --> src/main.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn count_time() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_mandelbrot` is never used
[INFO] [stdout]    --> src/main.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn calculate_mandelbrot(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mandelbrot_at_point` is never used
[INFO] [stdout]    --> src/main.rs:149:4
[INFO] [stdout]     |
[INFO] [stdout] 149 | fn mandelbrot_at_point(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `render_mandelbrot` is never used
[INFO] [stdout]    --> src/main.rs:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn render_mandelbrot(escape_vals: Vec<Vec<usize>>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_is_even` is never used
[INFO] [stdout]    --> src/main.rs:187:4
[INFO] [stdout]     |
[INFO] [stdout] 187 | fn check_is_even(num: i32) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_even` is never used
[INFO] [stdout]    --> src/main.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn is_even(num: i32) -> bool {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `show_range` is never used
[INFO] [stdout]    --> src/main.rs:199:4
[INFO] [stdout]     |
[INFO] [stdout] 199 | fn show_range() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guess_number` is never used
[INFO] [stdout]    --> src/main.rs:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | fn guess_number() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `author` and `title` are never read
[INFO] [stdout]    --> src/basic.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     struct Book {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 181 |         author: &'static str,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 182 |         title: &'static str,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_book` is never used
[INFO] [stdout]    --> src/basic.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn borrow_book(book: &Book) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/train_code.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl User {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 28 |     pub fn new(name: String, age: u32, solgan: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ticket` is never read
[INFO] [stdout]    --> src/train_code.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | pub struct Ticket<'a> {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 102 |     ticket: SemaphorePermit<'a>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "33aececf9c932344cf3ccd4bee8ed26030196473ace4498aff4e19f97ab2444f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33aececf9c932344cf3ccd4bee8ed26030196473ace4498aff4e19f97ab2444f", kill_on_drop: false }`
[INFO] [stdout] 33aececf9c932344cf3ccd4bee8ed26030196473ace4498aff4e19f97ab2444f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 963c07796e34e553e2981a3580bda222f60f2c0b29b53da7a2a762383fca926e
[INFO] running `Command { std: "docker" "start" "-a" "963c07796e34e553e2981a3580bda222f60f2c0b29b53da7a2a762383fca926e", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/games/snake/Cargo.toml: unused manifest key: examples
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> server/src/lib.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut prefix = String::from("My name is: ");
[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: `server` (lib) generated 1 warning (run `cargo fix --lib -p server` to apply 1 suggestion)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/basic.rs:160:12
[INFO] [stderr]     |
[INFO] [stderr] 160 |         if (count == 3) {
[INFO] [stderr]     |            ^          ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 160 -         if (count == 3) {
[INFO] [stderr] 160 +         if count == 3 {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/basic.rs:164:12
[INFO] [stderr]     |
[INFO] [stderr] 164 |         if (count == 10) {
[INFO] [stderr]     |            ^           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 164 -         if (count == 10) {
[INFO] [stderr] 164 +         if count == 10 {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/basic.rs:269:16
[INFO] [stderr]     |
[INFO] [stderr] 269 |             if (current > 100) {
[INFO] [stderr]     |                ^             ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 269 -             if (current > 100) {
[INFO] [stderr] 269 +             if current > 100 {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]    --> src/train_code.rs:152:9
[INFO] [stderr]     |
[INFO] [stderr] 152 |     use std::thread;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `server::show_name`
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use server::show_name;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `enum_usage`, `init_val`, `print_min_width`, `val_shadowing`
[INFO] [stderr]   --> src/main.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 | ...{arrays_slices, enum_usage, init_val, macro_usage, ownership_move, print_min_width, string_num_convert, val_shadowing, vector_usage};
[INFO] [stderr]    |                    ^^^^^^^^^^  ^^^^^^^^                               ^^^^^^^^^^^^^^^                      ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/main.rs:97:12
[INFO] [stderr]    |
[INFO] [stderr] 97 |         if (line.contains("println")) {
[INFO] [stderr]    |            ^                        ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 97 -         if (line.contains("println")) {
[INFO] [stderr] 97 +         if line.contains("println") {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/main.rs:137:29
[INFO] [stderr]     |
[INFO] [stderr] 137 |             let x_percent = (img_x as f64 / width as f64);
[INFO] [stderr]     |                             ^                           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 137 -             let x_percent = (img_x as f64 / width as f64);
[INFO] [stderr] 137 +             let x_percent = img_x as f64 / width as f64;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/main.rs:138:29
[INFO] [stderr]     |
[INFO] [stderr] 138 |             let y_percent = (img_y as f64 / height as f64);
[INFO] [stderr]     |                             ^                            ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 138 -             let y_percent = (img_y as f64 / height as f64);
[INFO] [stderr] 138 +             let y_percent = img_y as f64 / height as f64;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]    --> src/basic.rs:231:22
[INFO] [stderr]     |
[INFO] [stderr] 231 |         fn add(self, rhs: Bar) -> Self::Output {
[INFO] [stderr]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]    --> src/basic.rs:239:22
[INFO] [stderr]     |
[INFO] [stderr] 239 |         fn add(self, rhs: Foo) -> Self::Output {
[INFO] [stderr]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ticket_lists`
[INFO] [stderr]    --> src/train_code.rs:191:12
[INFO] [stderr]     |
[INFO] [stderr] 191 |        let ticket_lists: Vec<Ticket> = (0..10).map(|i| museum.get_ticket().unwrap()).collect();
[INFO] [stderr]     |            ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ticket_lists`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/train_code.rs:191:53
[INFO] [stderr]     |
[INFO] [stderr] 191 |        let ticket_lists: Vec<Ticket> = (0..10).map(|i| museum.get_ticket().unwrap()).collect();
[INFO] [stderr]     |                                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]  --> src/smart_pointer.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let b = *a + 1;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/thread.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let s = Instant::now();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/thread.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     for i in 0..N_THREADS {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `User` is never constructed
[INFO] [stderr]   --> src/main.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | struct User {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]   --> src/main.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | struct Rectangle {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `area` and `can_hold` are never used
[INFO] [stderr]   --> src/main.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | impl Rectangle {
[INFO] [stderr]    | -------------- methods in this implementation
[INFO] [stderr] 32 |     fn area(&self) -> u32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 35 |     fn can_hold(&self, other:&Rectangle) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_file` is never used
[INFO] [stderr]   --> src/main.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn read_file() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add` is never used
[INFO] [stderr]    --> src/main.rs:103:4
[INFO] [stderr]     |
[INFO] [stderr] 103 | fn add<T: Add<Output = T>>(i: T, j: T) -> T {
[INFO] [stderr]     |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `reporter` is never used
[INFO] [stderr]    --> src/main.rs:107:4
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn reporter<T: Debug>(item: T) {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `count_time` is never used
[INFO] [stderr]    --> src/main.rs:112:4
[INFO] [stderr]     |
[INFO] [stderr] 112 | fn count_time() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `calculate_mandelbrot` is never used
[INFO] [stderr]    --> src/main.rs:123:4
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn calculate_mandelbrot(
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `mandelbrot_at_point` is never used
[INFO] [stderr]    --> src/main.rs:149:4
[INFO] [stderr]     |
[INFO] [stderr] 149 | fn mandelbrot_at_point(
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `render_mandelbrot` is never used
[INFO] [stderr]    --> src/main.rs:166:4
[INFO] [stderr]     |
[INFO] [stderr] 166 | fn render_mandelbrot(escape_vals: Vec<Vec<usize>>) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `check_is_even` is never used
[INFO] [stderr]    --> src/main.rs:187:4
[INFO] [stderr]     |
[INFO] [stderr] 187 | fn check_is_even(num: i32) -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `is_even` is never used
[INFO] [stderr]    --> src/main.rs:194:4
[INFO] [stderr]     |
[INFO] [stderr] 194 | fn is_even(num: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `show_range` is never used
[INFO] [stderr]    --> src/main.rs:199:4
[INFO] [stderr]     |
[INFO] [stderr] 199 | fn show_range() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `guess_number` is never used
[INFO] [stderr]    --> src/main.rs:219:4
[INFO] [stderr]     |
[INFO] [stderr] 219 | fn guess_number() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `author` and `title` are never read
[INFO] [stderr]    --> src/basic.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |     struct Book {
[INFO] [stderr]     |            ---- fields in this struct
[INFO] [stderr] 181 |         author: &'static str,
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr] 182 |         title: &'static str,
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `borrow_book` is never used
[INFO] [stderr]    --> src/basic.rs:187:8
[INFO] [stderr]     |
[INFO] [stderr] 187 |     fn borrow_book(book: &Book) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/train_code.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl User {
[INFO] [stderr]    | --------- associated function in this implementation
[INFO] [stderr] 28 |     pub fn new(name: String, age: u32, solgan: String) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `ticket` is never read
[INFO] [stderr]    --> src/train_code.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 101 | pub struct Ticket<'a> {
[INFO] [stderr]     |            ------ field in this struct
[INFO] [stderr] 102 |     ticket: SemaphorePermit<'a>,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-demo` (bin "rust-demo" test) generated 34 warnings (run `cargo fix --bin "rust-demo" --tests` to apply 9 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] [stderr]      Running unittests src/bin/mini_redis.rs (/opt/rustwide/target/debug/deps/mini_redis-4da381ec732d91b1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_demo-470222651c0ac15c)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test basic::tests::test_array_slice ... ok
[INFO] [stdout] test basic::tests::test_flow_of_control ... ok
[INFO] [stdout] test basic::tests::test_traits_iter ... ok
[INFO] [stdout] test basic::tests::test_operator_overload ... ok
[INFO] [stdout] test basic::tests::test_print_usage ... ok
[INFO] [stdout] test basic::tests::test_vector_usage ... ok
[INFO] [stdout] test train_code::tests::event_work ... ok
[INFO] [stdout] test train_code::tests::museum_work ... ok
[INFO] [stdout] test train_code::tests::use_strtok ... ok
[INFO] [stdout] test smart_pointer::tests::it_works ... ok
[INFO] [stdout] test train_code::tests::user_work ... FAILED
[INFO] [stdout] test thread::tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- train_code::tests::user_work stdout ----
[INFO] [stdout] thread 'train_code::tests::user_work' panicked at src/train_code.rs:161:44:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x560c038477f5 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x560c038477f5 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x560c038477f5 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x560c038477f5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x560c0386e09b - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x560c0386e09b - core::fmt::write::h8bcd80919a02be29
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x560c0384502f - std::io::Write::write_fmt::h8d0c47c662cad79c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x560c038475ce - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x560c038475ce - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x560c03848ff9 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stdout]   10:     0x560c03848cbe - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x560c037f71aa - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he5eacdef44c8728f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x560c037f71aa - test::test_main::{{closure}}::h0ec9aed229e79095
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x560c038495fb - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcbd0d80e1ad4e4f9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x560c038495fb - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x560c03849374 - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:664:13
[INFO] [stdout]   16:     0x560c03847cb9 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x560c038490a7 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x560c03787843 - core::panicking::panic_fmt::hec11a924b87ce965
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x560c03787d76 - core::result::unwrap_failed::h382691b96ca8c13a
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/result.rs:1654:5
[INFO] [stdout]   20:     0x560c037aa253 - core::result::Result<T,E>::unwrap::ha7e07438acead22d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x560c037aa253 - rust_demo::train_code::tests::user_work::h7e997fd3e46f0c85
[INFO] [stdout]                                at /opt/rustwide/workdir/src/train_code.rs:161:9
[INFO] [stdout]   22:     0x560c037aa127 - rust_demo::train_code::tests::user_work::{{closure}}::hbadb121dc08e5acf
[INFO] [stdout]                                at /opt/rustwide/workdir/src/train_code.rs:158:19
[INFO] [stdout]   23:     0x560c037a6ac6 - core::ops::function::FnOnce::call_once::ha3a6e0c125883980
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x560c037fbb8b - core::ops::function::FnOnce::call_once::h2e43a8f6f3d94b99
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x560c037fbb8b - test::__rust_begin_short_backtrace::h214c9f2d2d3fee90
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:625:18
[INFO] [stdout]   26:     0x560c037fb291 - test::run_test_in_process::{{closure}}::h510b7ba7990692a5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:60
[INFO] [stdout]   27:     0x560c037fb291 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4157186197a93871
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x560c037fb291 - std::panicking::try::do_call::h1bf2463bccd4b28c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   29:     0x560c037fb291 - std::panicking::try::hd6d4808c9fab4fa5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   30:     0x560c037fb291 - std::panic::catch_unwind::hd5641d97d123f9f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   31:     0x560c037fb291 - test::run_test_in_process::hc273b71c8b878a4c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:27
[INFO] [stdout]   32:     0x560c037fb291 - test::run_test::{{closure}}::h6838df834eb8467e
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:569:43
[INFO] [stdout]   33:     0x560c037c3c54 - test::run_test::{{closure}}::h608b98ecff5665fb
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:599:41
[INFO] [stdout]   34:     0x560c037c3c54 - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc4182b97d1042e9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x560c037c8682 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h571773fd21d674c8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   36:     0x560c037c8682 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdcd384cf2fa70ba3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x560c037c8682 - std::panicking::try::do_call::h4f1a44bd81423be1
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   38:     0x560c037c8682 - std::panicking::try::h5e02afcb81dcd361
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   39:     0x560c037c8682 - std::panic::catch_unwind::h022f75775bfd8c45
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   40:     0x560c037c8682 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf5a62e9e4e6df1f8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   41:     0x560c037c8682 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6d56360aeb9509a7
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x560c0384d7eb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7a343dc551c06baa
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   43:     0x560c0384d7eb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h30b8111cbaa644f3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   44:     0x560c0384d7eb - std::sys::pal::unix::thread::Thread::new::thread_start::h7404e134e61e7a11
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f257e2bbac3 - <unknown>
[INFO] [stdout]   46:     0x7f257e34ca04 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     train_code::tests::user_work
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 11 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.22s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rust-demo`
[INFO] running `Command { std: "docker" "inspect" "963c07796e34e553e2981a3580bda222f60f2c0b29b53da7a2a762383fca926e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "963c07796e34e553e2981a3580bda222f60f2c0b29b53da7a2a762383fca926e", kill_on_drop: false }`
[INFO] [stdout] 963c07796e34e553e2981a3580bda222f60f2c0b29b53da7a2a762383fca926e
[INFO] testing D-lyw/rust-demos against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FD-lyw%2Frust-demos" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/D-lyw/rust-demos on toolchain b642703cf9526da1e72c0b6755753b939a9c6b6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/D-lyw/rust-demos
[INFO] finished tweaking git repo https://github.com/D-lyw/rust-demos
[INFO] tweaked toml for git repo https://github.com/D-lyw/rust-demos written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/D-lyw/rust-demos 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" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-5-tc2/source/games/snake/Cargo.toml: unused manifest key: examples
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9295c9e7b70b2a10144d4251c031b50d42550d51a4bcf6a205581c784e86d67e
[INFO] running `Command { std: "docker" "start" "-a" "9295c9e7b70b2a10144d4251c031b50d42550d51a4bcf6a205581c784e86d67e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9295c9e7b70b2a10144d4251c031b50d42550d51a4bcf6a205581c784e86d67e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9295c9e7b70b2a10144d4251c031b50d42550d51a4bcf6a205581c784e86d67e", kill_on_drop: false }`
[INFO] [stdout] 9295c9e7b70b2a10144d4251c031b50d42550d51a4bcf6a205581c784e86d67e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c2d0befcf295f83c48798d622bcb61e16b7406f4fdef3a6a2e807aebabf694c
[INFO] running `Command { std: "docker" "start" "-a" "1c2d0befcf295f83c48798d622bcb61e16b7406f4fdef3a6a2e807aebabf694c", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/games/snake/Cargo.toml: unused manifest key: examples
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling pin-project-lite v0.2.14
[INFO] [stderr]    Compiling log v0.4.21
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling bytes v1.6.0
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling cc v1.0.92
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]    Compiling serde v1.0.198
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling futures-task v0.3.30
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]    Compiling openssl v0.10.64
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling try-lock v0.2.5
[INFO] [stderr]    Compiling bitflags v2.5.0
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling http v1.1.0
[INFO] [stderr]    Compiling ryu v1.0.17
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling want v0.3.1
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling tower-layer v0.3.2
[INFO] [stderr]    Compiling tower-service v0.3.2
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.23
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling mio v0.8.11
[INFO] [stderr]    Compiling socket2 v0.5.6
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling http-body v1.0.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling getrandom v0.2.14
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling openssl-sys v0.9.102
[INFO] [stderr]    Compiling unicode-bidi v0.3.15
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling iana-time-zone v0.1.60
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling http-body-util v0.1.1
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling tracing-log v0.1.4
[INFO] [stderr]    Compiling thread_local v1.1.8
[INFO] [stderr]    Compiling rustls-pki-types v1.4.1
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling idna v0.5.0
[INFO] [stderr]    Compiling base64 v0.22.0
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling chrono v0.4.37
[INFO] [stderr]    Compiling num-complex v0.4.5
[INFO] [stderr]    Compiling atoi v0.3.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rustls-pemfile v2.1.2
[INFO] [stderr]    Compiling url v2.5.0
[INFO] [stderr]    Compiling num-iter v0.1.44
[INFO] [stderr]    Compiling encoding_rs v0.8.34
[INFO] [stderr]    Compiling ipnet v2.9.0
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling mime v0.3.17
[INFO] [stderr]    Compiling sync_wrapper v0.1.2
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling server v0.1.0 (/opt/rustwide/workdir/server)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> server/src/lib.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut prefix = String::from("My name is: ");
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.198
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling async-stream v0.3.5
[INFO] [stderr]    Compiling tokio v1.37.0
[INFO] [stderr]    Compiling pin-project v1.1.5
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling tracing-serde v0.1.3
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-util v0.7.10
[INFO] [stderr]    Compiling tower v0.4.13
[INFO] [stderr]    Compiling tokio-native-tls v0.3.1
[INFO] [stderr]    Compiling tokio-stream v0.1.15
[INFO] [stderr]    Compiling h2 v0.4.4
[INFO] [stderr]    Compiling tracing-subscriber v0.2.25
[INFO] [stderr]    Compiling mini-redis v0.4.1
[INFO] [stderr]    Compiling hyper v1.2.0
[INFO] [stderr]    Compiling hyper-util v0.1.3
[INFO] [stderr]    Compiling hyper-tls v0.6.0
[INFO] [stderr]    Compiling reqwest v0.12.3
[INFO] [stderr]    Compiling rust-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:160:12
[INFO] [stdout]     |
[INFO] [stdout] 160 |         if (count == 3) {
[INFO] [stdout]     |            ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 160 -         if (count == 3) {
[INFO] [stdout] 160 +         if count == 3 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |         if (count == 10) {
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 164 -         if (count == 10) {
[INFO] [stdout] 164 +         if count == 10 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:269:16
[INFO] [stdout]     |
[INFO] [stdout] 269 |             if (current > 100) {
[INFO] [stdout]     |                ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 269 -             if (current > 100) {
[INFO] [stdout] 269 +             if current > 100 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/smart_pointer.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `server::show_name`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use server::show_name;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `enum_usage`, `init_val`, `print_min_width`, `val_shadowing`
[INFO] [stdout]   --> src/main.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 | ...{arrays_slices, enum_usage, init_val, macro_usage, ownership_move, print_min_width, string_num_convert, val_shadowing, vector_usage};
[INFO] [stdout]    |                    ^^^^^^^^^^  ^^^^^^^^                               ^^^^^^^^^^^^^^^                      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |         if (line.contains("println")) {
[INFO] [stdout]    |            ^                        ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 97 -         if (line.contains("println")) {
[INFO] [stdout] 97 +         if line.contains("println") {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:137:29
[INFO] [stdout]     |
[INFO] [stdout] 137 |             let x_percent = (img_x as f64 / width as f64);
[INFO] [stdout]     |                             ^                           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 137 -             let x_percent = (img_x as f64 / width as f64);
[INFO] [stdout] 137 +             let x_percent = img_x as f64 / width as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:138:29
[INFO] [stdout]     |
[INFO] [stdout] 138 |             let y_percent = (img_y as f64 / height as f64);
[INFO] [stdout]     |                             ^                            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -             let y_percent = (img_y as f64 / height as f64);
[INFO] [stdout] 138 +             let y_percent = img_y as f64 / height as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/basic.rs:231:22
[INFO] [stdout]     |
[INFO] [stdout] 231 |         fn add(self, rhs: Bar) -> Self::Output {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/basic.rs:239:22
[INFO] [stdout]     |
[INFO] [stdout] 239 |         fn add(self, rhs: Foo) -> Self::Output {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/smart_pointer.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let b = *a + 1;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/thread.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let s = Instant::now();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/thread.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     for i in 0..N_THREADS {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/main.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/main.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `area` and `can_hold` are never used
[INFO] [stdout]   --> src/main.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Rectangle {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 32 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn can_hold(&self, other:&Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn read_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/main.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn add<T: Add<Output = T>>(i: T, j: T) -> T {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reporter` is never used
[INFO] [stdout]    --> src/main.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn reporter<T: Debug>(item: T) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_time` is never used
[INFO] [stdout]    --> src/main.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn count_time() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_mandelbrot` is never used
[INFO] [stdout]    --> src/main.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn calculate_mandelbrot(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mandelbrot_at_point` is never used
[INFO] [stdout]    --> src/main.rs:149:4
[INFO] [stdout]     |
[INFO] [stdout] 149 | fn mandelbrot_at_point(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `render_mandelbrot` is never used
[INFO] [stdout]    --> src/main.rs:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn render_mandelbrot(escape_vals: Vec<Vec<usize>>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_is_even` is never used
[INFO] [stdout]    --> src/main.rs:187:4
[INFO] [stdout]     |
[INFO] [stdout] 187 | fn check_is_even(num: i32) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_even` is never used
[INFO] [stdout]    --> src/main.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn is_even(num: i32) -> bool {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `show_range` is never used
[INFO] [stdout]    --> src/main.rs:199:4
[INFO] [stdout]     |
[INFO] [stdout] 199 | fn show_range() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guess_number` is never used
[INFO] [stdout]    --> src/main.rs:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | fn guess_number() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `author` and `title` are never read
[INFO] [stdout]    --> src/basic.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     struct Book {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 181 |         author: &'static str,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 182 |         title: &'static str,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_book` is never used
[INFO] [stdout]    --> src/basic.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn borrow_book(book: &Book) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `operator_overload` is never used
[INFO] [stdout]    --> src/basic.rs:211:4
[INFO] [stdout]     |
[INFO] [stdout] 211 | fn operator_overload() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `traits_iter` is never used
[INFO] [stdout]    --> src/basic.rs:248:4
[INFO] [stdout]     |
[INFO] [stdout] 248 | fn traits_iter() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/basic.rs:256:12
[INFO] [stdout]     |
[INFO] [stdout] 255 |     impl Fibonacci {
[INFO] [stdout]     |     -------------- associated function in this implementation
[INFO] [stdout] 256 |         fn new() -> Fibonacci {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `persist`, and `load` are never used
[INFO] [stdout]   --> src/train_code.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl User {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 28 |     pub fn new(name: String, age: u32, solgan: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn persist(&self, filename: String) -> Result<usize, std::io::Error> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn load(filename: String) -> Result<Self, std::io::Error> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `remaining_ticket` is never read
[INFO] [stdout]   --> src/train_code.rs:79:5
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub struct Museum {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 79 |     remaining_ticket: Semaphore,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_ticket`, and `avaialable_ticket` are never used
[INFO] [stdout]   --> src/train_code.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl Museum {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 83 |     fn new(max_ticket: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn get_ticket(&self) -> Option<Ticket<'_>> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 96 |     fn avaialable_ticket(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ticket` is never read
[INFO] [stdout]    --> src/train_code.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | pub struct Ticket<'a> {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 102 |     ticket: SemaphorePermit<'a>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.20s
[INFO] running `Command { std: "docker" "inspect" "1c2d0befcf295f83c48798d622bcb61e16b7406f4fdef3a6a2e807aebabf694c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c2d0befcf295f83c48798d622bcb61e16b7406f4fdef3a6a2e807aebabf694c", kill_on_drop: false }`
[INFO] [stdout] 1c2d0befcf295f83c48798d622bcb61e16b7406f4fdef3a6a2e807aebabf694c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0a2aa00b834eab820889724b8d1d8c59a44196c84aaa4ad9ac4a65844c9b88f
[INFO] running `Command { std: "docker" "start" "-a" "b0a2aa00b834eab820889724b8d1d8c59a44196c84aaa4ad9ac4a65844c9b88f", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/games/snake/Cargo.toml: unused manifest key: examples
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> server/src/lib.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut prefix = String::from("My name is: ");
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:160:12
[INFO] [stdout]     |
[INFO] [stdout] 160 |         if (count == 3) {
[INFO] [stdout]     |            ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 160 -         if (count == 3) {
[INFO] [stdout] 160 +         if count == 3 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:164:12
[INFO] [stdout]     |
[INFO] [stdout] 164 |         if (count == 10) {
[INFO] [stdout]     |            ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 164 -         if (count == 10) {
[INFO] [stdout] 164 +         if count == 10 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/basic.rs:269:16
[INFO] [stdout]     |
[INFO] [stdout] 269 |             if (current > 100) {
[INFO] [stdout]     |                ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 269 -             if (current > 100) {
[INFO] [stdout] 269 +             if current > 100 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]    --> src/train_code.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 |     use std::thread;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `server::show_name`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use server::show_name;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `enum_usage`, `init_val`, `print_min_width`, `val_shadowing`
[INFO] [stdout]   --> src/main.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 | ...{arrays_slices, enum_usage, init_val, macro_usage, ownership_move, print_min_width, string_num_convert, val_shadowing, vector_usage};
[INFO] [stdout]    |                    ^^^^^^^^^^  ^^^^^^^^                               ^^^^^^^^^^^^^^^                      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |         if (line.contains("println")) {
[INFO] [stdout]    |            ^                        ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 97 -         if (line.contains("println")) {
[INFO] [stdout] 97 +         if line.contains("println") {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:137:29
[INFO] [stdout]     |
[INFO] [stdout] 137 |             let x_percent = (img_x as f64 / width as f64);
[INFO] [stdout]     |                             ^                           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 137 -             let x_percent = (img_x as f64 / width as f64);
[INFO] [stdout] 137 +             let x_percent = img_x as f64 / width as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/main.rs:138:29
[INFO] [stdout]     |
[INFO] [stdout] 138 |             let y_percent = (img_y as f64 / height as f64);
[INFO] [stdout]     |                             ^                            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 138 -             let y_percent = (img_y as f64 / height as f64);
[INFO] [stdout] 138 +             let y_percent = img_y as f64 / height as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/basic.rs:231:22
[INFO] [stdout]     |
[INFO] [stdout] 231 |         fn add(self, rhs: Bar) -> Self::Output {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/basic.rs:239:22
[INFO] [stdout]     |
[INFO] [stdout] 239 |         fn add(self, rhs: Foo) -> Self::Output {
[INFO] [stdout]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ticket_lists`
[INFO] [stdout]    --> src/train_code.rs:191:12
[INFO] [stdout]     |
[INFO] [stdout] 191 |        let ticket_lists: Vec<Ticket> = (0..10).map(|i| museum.get_ticket().unwrap()).collect();
[INFO] [stdout]     |            ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ticket_lists`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/train_code.rs:191:53
[INFO] [stdout]     |
[INFO] [stdout] 191 |        let ticket_lists: Vec<Ticket> = (0..10).map(|i| museum.get_ticket().unwrap()).collect();
[INFO] [stdout]     |                                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/smart_pointer.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let b = *a + 1;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/thread.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let s = Instant::now();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/thread.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     for i in 0..N_THREADS {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/main.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/main.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `area` and `can_hold` are never used
[INFO] [stdout]   --> src/main.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Rectangle {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 32 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn can_hold(&self, other:&Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn read_file() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/main.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn add<T: Add<Output = T>>(i: T, j: T) -> T {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reporter` is never used
[INFO] [stdout]    --> src/main.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn reporter<T: Debug>(item: T) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_time` is never used
[INFO] [stdout]    --> src/main.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn count_time() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_mandelbrot` is never used
[INFO] [stdout]    --> src/main.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn calculate_mandelbrot(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mandelbrot_at_point` is never used
[INFO] [stdout]    --> src/main.rs:149:4
[INFO] [stdout]     |
[INFO] [stdout] 149 | fn mandelbrot_at_point(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `render_mandelbrot` is never used
[INFO] [stdout]    --> src/main.rs:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn render_mandelbrot(escape_vals: Vec<Vec<usize>>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_is_even` is never used
[INFO] [stdout]    --> src/main.rs:187:4
[INFO] [stdout]     |
[INFO] [stdout] 187 | fn check_is_even(num: i32) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_even` is never used
[INFO] [stdout]    --> src/main.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn is_even(num: i32) -> bool {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `show_range` is never used
[INFO] [stdout]    --> src/main.rs:199:4
[INFO] [stdout]     |
[INFO] [stdout] 199 | fn show_range() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guess_number` is never used
[INFO] [stdout]    --> src/main.rs:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | fn guess_number() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `author` and `title` are never read
[INFO] [stdout]    --> src/basic.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     struct Book {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 181 |         author: &'static str,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 182 |         title: &'static str,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_book` is never used
[INFO] [stdout]    --> src/basic.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     fn borrow_book(book: &Book) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/train_code.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl User {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 28 |     pub fn new(name: String, age: u32, solgan: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ticket` is never read
[INFO] [stdout]    --> src/train_code.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | pub struct Ticket<'a> {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 102 |     ticket: SemaphorePermit<'a>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `Command { std: "docker" "inspect" "b0a2aa00b834eab820889724b8d1d8c59a44196c84aaa4ad9ac4a65844c9b88f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0a2aa00b834eab820889724b8d1d8c59a44196c84aaa4ad9ac4a65844c9b88f", kill_on_drop: false }`
[INFO] [stdout] b0a2aa00b834eab820889724b8d1d8c59a44196c84aaa4ad9ac4a65844c9b88f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d3f14208bbc55613c6a889ceba51544be5a478631fb9909608e080e577a22c4a
[INFO] running `Command { std: "docker" "start" "-a" "d3f14208bbc55613c6a889ceba51544be5a478631fb9909608e080e577a22c4a", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/games/snake/Cargo.toml: unused manifest key: examples
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> server/src/lib.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut prefix = String::from("My name is: ");
[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: `server` (lib) generated 1 warning (run `cargo fix --lib -p server` to apply 1 suggestion)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/basic.rs:160:12
[INFO] [stderr]     |
[INFO] [stderr] 160 |         if (count == 3) {
[INFO] [stderr]     |            ^          ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 160 -         if (count == 3) {
[INFO] [stderr] 160 +         if count == 3 {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/basic.rs:164:12
[INFO] [stderr]     |
[INFO] [stderr] 164 |         if (count == 10) {
[INFO] [stderr]     |            ^           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 164 -         if (count == 10) {
[INFO] [stderr] 164 +         if count == 10 {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/basic.rs:269:16
[INFO] [stderr]     |
[INFO] [stderr] 269 |             if (current > 100) {
[INFO] [stderr]     |                ^             ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 269 -             if (current > 100) {
[INFO] [stderr] 269 +             if current > 100 {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]    --> src/train_code.rs:152:9
[INFO] [stderr]     |
[INFO] [stderr] 152 |     use std::thread;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `server::show_name`
[INFO] [stderr]   --> src/main.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use server::show_name;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `enum_usage`, `init_val`, `print_min_width`, `val_shadowing`
[INFO] [stderr]   --> src/main.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 | ...{arrays_slices, enum_usage, init_val, macro_usage, ownership_move, print_min_width, string_num_convert, val_shadowing, vector_usage};
[INFO] [stderr]    |                    ^^^^^^^^^^  ^^^^^^^^                               ^^^^^^^^^^^^^^^                      ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/main.rs:97:12
[INFO] [stderr]    |
[INFO] [stderr] 97 |         if (line.contains("println")) {
[INFO] [stderr]    |            ^                        ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 97 -         if (line.contains("println")) {
[INFO] [stderr] 97 +         if line.contains("println") {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/main.rs:137:29
[INFO] [stderr]     |
[INFO] [stderr] 137 |             let x_percent = (img_x as f64 / width as f64);
[INFO] [stderr]     |                             ^                           ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 137 -             let x_percent = (img_x as f64 / width as f64);
[INFO] [stderr] 137 +             let x_percent = img_x as f64 / width as f64;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/main.rs:138:29
[INFO] [stderr]     |
[INFO] [stderr] 138 |             let y_percent = (img_y as f64 / height as f64);
[INFO] [stderr]     |                             ^                            ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 138 -             let y_percent = (img_y as f64 / height as f64);
[INFO] [stderr] 138 +             let y_percent = img_y as f64 / height as f64;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]    --> src/basic.rs:231:22
[INFO] [stderr]     |
[INFO] [stderr] 231 |         fn add(self, rhs: Bar) -> Self::Output {
[INFO] [stderr]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]    --> src/basic.rs:239:22
[INFO] [stderr]     |
[INFO] [stderr] 239 |         fn add(self, rhs: Foo) -> Self::Output {
[INFO] [stderr]     |                      ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ticket_lists`
[INFO] [stderr]    --> src/train_code.rs:191:12
[INFO] [stderr]     |
[INFO] [stderr] 191 |        let ticket_lists: Vec<Ticket> = (0..10).map(|i| museum.get_ticket().unwrap()).collect();
[INFO] [stderr]     |            ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ticket_lists`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/train_code.rs:191:53
[INFO] [stderr]     |
[INFO] [stderr] 191 |        let ticket_lists: Vec<Ticket> = (0..10).map(|i| museum.get_ticket().unwrap()).collect();
[INFO] [stderr]     |                                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]  --> src/smart_pointer.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let b = *a + 1;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/thread.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let s = Instant::now();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/thread.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     for i in 0..N_THREADS {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `User` is never constructed
[INFO] [stderr]   --> src/main.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | struct User {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]   --> src/main.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | struct Rectangle {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `area` and `can_hold` are never used
[INFO] [stderr]   --> src/main.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | impl Rectangle {
[INFO] [stderr]    | -------------- methods in this implementation
[INFO] [stderr] 32 |     fn area(&self) -> u32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 35 |     fn can_hold(&self, other:&Rectangle) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_file` is never used
[INFO] [stderr]   --> src/main.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn read_file() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add` is never used
[INFO] [stderr]    --> src/main.rs:103:4
[INFO] [stderr]     |
[INFO] [stderr] 103 | fn add<T: Add<Output = T>>(i: T, j: T) -> T {
[INFO] [stderr]     |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `reporter` is never used
[INFO] [stderr]    --> src/main.rs:107:4
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn reporter<T: Debug>(item: T) {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `count_time` is never used
[INFO] [stderr]    --> src/main.rs:112:4
[INFO] [stderr]     |
[INFO] [stderr] 112 | fn count_time() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `calculate_mandelbrot` is never used
[INFO] [stderr]    --> src/main.rs:123:4
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn calculate_mandelbrot(
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `mandelbrot_at_point` is never used
[INFO] [stderr]    --> src/main.rs:149:4
[INFO] [stderr]     |
[INFO] [stderr] 149 | fn mandelbrot_at_point(
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `render_mandelbrot` is never used
[INFO] [stderr]    --> src/main.rs:166:4
[INFO] [stderr]     |
[INFO] [stderr] 166 | fn render_mandelbrot(escape_vals: Vec<Vec<usize>>) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `check_is_even` is never used
[INFO] [stderr]    --> src/main.rs:187:4
[INFO] [stderr]     |
[INFO] [stderr] 187 | fn check_is_even(num: i32) -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `is_even` is never used
[INFO] [stderr]    --> src/main.rs:194:4
[INFO] [stderr]     |
[INFO] [stderr] 194 | fn is_even(num: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `show_range` is never used
[INFO] [stderr]    --> src/main.rs:199:4
[INFO] [stderr]     |
[INFO] [stderr] 199 | fn show_range() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `guess_number` is never used
[INFO] [stderr]    --> src/main.rs:219:4
[INFO] [stderr]     |
[INFO] [stderr] 219 | fn guess_number() {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `author` and `title` are never read
[INFO] [stderr]    --> src/basic.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |     struct Book {
[INFO] [stderr]     |            ---- fields in this struct
[INFO] [stderr] 181 |         author: &'static str,
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr] 182 |         title: &'static str,
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `borrow_book` is never used
[INFO] [stderr]    --> src/basic.rs:187:8
[INFO] [stderr]     |
[INFO] [stderr] 187 |     fn borrow_book(book: &Book) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/train_code.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 27 | impl User {
[INFO] [stderr]    | --------- associated function in this implementation
[INFO] [stderr] 28 |     pub fn new(name: String, age: u32, solgan: String) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `ticket` is never read
[INFO] [stderr]    --> src/train_code.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 101 | pub struct Ticket<'a> {
[INFO] [stderr]     |            ------ field in this struct
[INFO] [stderr] 102 |     ticket: SemaphorePermit<'a>,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-demo` (bin "rust-demo" test) generated 34 warnings (run `cargo fix --bin "rust-demo" --tests` to apply 9 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] [stderr]      Running unittests src/bin/mini_redis.rs (/opt/rustwide/target/debug/deps/mini_redis-4da381ec732d91b1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_demo-470222651c0ac15c)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test basic::tests::test_array_slice ... ok
[INFO] [stdout] test basic::tests::test_operator_overload ... ok
[INFO] [stdout] test basic::tests::test_print_usage ... ok
[INFO] [stdout] test basic::tests::test_traits_iter ... ok
[INFO] [stdout] test basic::tests::test_flow_of_control ... ok
[INFO] [stdout] test basic::tests::test_vector_usage ... ok
[INFO] [stdout] test train_code::tests::event_work ... ok
[INFO] [stdout] test train_code::tests::museum_work ... ok
[INFO] [stdout] test train_code::tests::use_strtok ... ok
[INFO] [stdout] test smart_pointer::tests::it_works ... ok
[INFO] [stdout] test train_code::tests::user_work ... FAILED
[INFO] [stdout] test thread::tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- train_code::tests::user_work stdout ----
[INFO] [stdout] thread 'train_code::tests::user_work' panicked at src/train_code.rs:161:44:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55bc9d9e4265 - std::backtrace_rs::backtrace::libunwind::trace::he49dc9a9e3164223
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x55bc9d9e4265 - std::backtrace_rs::backtrace::trace_unsynchronized::h3a3e77c68030aa6b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55bc9d9e4265 - std::sys_common::backtrace::_print_fmt::h9479ad2f99afd5d4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55bc9d9e4265 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfb01aa1fa3fb1821
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55bc9da0aaab - core::fmt::rt::Argument::fmt::h125e56152abbc1c3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x55bc9da0aaab - core::fmt::write::hb0ab4ff05ccfe741
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x55bc9d9e1b4f - std::io::Write::write_fmt::hea6336dbf2fa00b8
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x55bc9d9e403e - std::sys_common::backtrace::_print::h79ca548f3a2adf4b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55bc9d9e403e - std::sys_common::backtrace::print::h9aebf997b2fea2d3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55bc9d9e59a9 - std::panicking::default_hook::{{closure}}::h68a0954af2694526
[INFO] [stdout]   10:     0x55bc9d9e56fc - std::panicking::default_hook::h5be50cc6849ffb00
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x55bc9d998c0f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd874405dcbd1d3ed
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x55bc9d998c0f - test::test_main::{{closure}}::h4f26a9df34a84b94
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x55bc9d9e5fab - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h00e96d9c62aa9a12
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x55bc9d9e5fab - std::panicking::rust_panic_with_hook::h3c0df6036729334c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x55bc9d9e5d24 - std::panicking::begin_panic_handler::{{closure}}::ha3a21e93c4cfd807
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:664:13
[INFO] [stdout]   16:     0x55bc9d9e4729 - std::sys_common::backtrace::__rust_end_short_backtrace::h19508a8f8ae71dc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x55bc9d9e5a57 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x55bc9d928823 - core::panicking::panic_fmt::h2ba8af99174d83ea
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55bc9d928d56 - core::result::unwrap_failed::h52f3bbb78b59f71d
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/result.rs:1654:5
[INFO] [stdout]   20:     0x55bc9d93e543 - core::result::Result<T,E>::unwrap::ha015e61c8b6521ec
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x55bc9d93e543 - rust_demo::train_code::tests::user_work::h6fafd541c27260c0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/train_code.rs:161:9
[INFO] [stdout]   22:     0x55bc9d93e417 - rust_demo::train_code::tests::user_work::{{closure}}::h9700816703e3d9bb
[INFO] [stdout]                                at /opt/rustwide/workdir/src/train_code.rs:158:19
[INFO] [stdout]   23:     0x55bc9d944046 - core::ops::function::FnOnce::call_once::h2e78529e9bed9e95
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55bc9d99d52b - core::ops::function::FnOnce::call_once::h18c6bf92212b87a4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55bc9d99d52b - test::__rust_begin_short_backtrace::hdcf0edcfa9080086
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:625:18
[INFO] [stdout]   26:     0x55bc9d99cbf1 - test::run_test_in_process::{{closure}}::heac2c4eb375d2d10
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:60
[INFO] [stdout]   27:     0x55bc9d99cbf1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0289bafc8a1cc004
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x55bc9d99cbf1 - std::panicking::try::do_call::h5e158f1ad8a5f983
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   29:     0x55bc9d99cbf1 - std::panicking::try::hea3411d60321c4de
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   30:     0x55bc9d99cbf1 - std::panic::catch_unwind::hafb7bb18bc47bbc7
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   31:     0x55bc9d99cbf1 - test::run_test_in_process::h74dd138dc7762d99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:27
[INFO] [stdout]   32:     0x55bc9d99cbf1 - test::run_test::{{closure}}::h6b390822e63606cf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:569:43
[INFO] [stdout]   33:     0x55bc9d9655c4 - test::run_test::{{closure}}::h6e11dba8131d354b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:599:41
[INFO] [stdout]   34:     0x55bc9d9655c4 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha71b3541b59bdbbb
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x55bc9d96a092 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hef92127c5ef9e53c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   36:     0x55bc9d96a092 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h859c109f9d11c92b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x55bc9d96a092 - std::panicking::try::do_call::hbf534c458cd858f0
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   38:     0x55bc9d96a092 - std::panicking::try::h65c18365a7b9ad90
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   39:     0x55bc9d96a092 - std::panic::catch_unwind::h21b25d4c69478c39
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   40:     0x55bc9d96a092 - std::thread::Builder::spawn_unchecked_::{{closure}}::h23335f620275a9bf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   41:     0x55bc9d96a092 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb491dc55513e9b7c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55bc9d9ea18b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h41b39260afcffdc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   43:     0x55bc9d9ea18b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6694c8dc6dd010c4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   44:     0x55bc9d9ea18b - std::sys::pal::unix::thread::Thread::new::thread_start::hf16038e1c8e19c99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7fbffce4fac3 - <unknown>
[INFO] [stdout]   46:     0x7fbffcee0a04 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     train_code::tests::user_work
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 11 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.20s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rust-demo`
[INFO] running `Command { std: "docker" "inspect" "d3f14208bbc55613c6a889ceba51544be5a478631fb9909608e080e577a22c4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3f14208bbc55613c6a889ceba51544be5a478631fb9909608e080e577a22c4a", kill_on_drop: false }`
[INFO] [stdout] d3f14208bbc55613c6a889ceba51544be5a478631fb9909608e080e577a22c4a
