[INFO] cloning repository https://github.com/chenmeng1996/rdemo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chenmeng1996/rdemo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchenmeng1996%2Frdemo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchenmeng1996%2Frdemo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15b574d454a9c9bcb83d9fe9e3bae2034701cbe7
[INFO] testing chenmeng1996/rdemo against 1.69.0 for beta-1.70-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchenmeng1996%2Frdemo" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chenmeng1996/rdemo on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chenmeng1996/rdemo
[INFO] finished tweaking git repo https://github.com/chenmeng1996/rdemo
[INFO] tweaked toml for git repo https://github.com/chenmeng1996/rdemo written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/chenmeng1996/rdemo 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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded iana-time-zone v0.1.50
[INFO] [stderr]   Downloaded abnf-core v0.5.0
[INFO] [stderr]   Downloaded abnf v0.12.0
[INFO] [stderr]   Downloaded mail-builder v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cafaef1ff009b81c8c9cb332364c9476b6c20ecdf47a3cb324d93cb05b4e480e
[INFO] running `Command { std: "docker" "start" "-a" "cafaef1ff009b81c8c9cb332364c9476b6c20ecdf47a3cb324d93cb05b4e480e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cafaef1ff009b81c8c9cb332364c9476b6c20ecdf47a3cb324d93cb05b4e480e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cafaef1ff009b81c8c9cb332364c9476b6c20ecdf47a3cb324d93cb05b4e480e", kill_on_drop: false }`
[INFO] [stdout] cafaef1ff009b81c8c9cb332364c9476b6c20ecdf47a3cb324d93cb05b4e480e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db53fd94442dcb0fc9b33c8a8f3645b8bacf35137bda516ca8292d5bc9c6fd38
[INFO] running `Command { std: "docker" "start" "-a" "db53fd94442dcb0fc9b33c8a8f3645b8bacf35137bda516ca8292d5bc9c6fd38", kill_on_drop: false }`
[INFO] [stderr]    Compiling rdemo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:71:28
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:71:38
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:73:40
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:73:50
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |                                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:75:16
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:75:37
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:79:38
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn notify5<T: Summary + Display>(item1: T) {}
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:80:16
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn notify6(item1: impl Summary + Display) {}
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/trait_test.rs:83:56
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |                                                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/trait_test.rs:83:62
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/trait_test.rs:85:25
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/trait_test.rs:85:31
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]  --> src/enumeration_test.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddr` is never used
[INFO] [stdout]  --> src/enumeration_test.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum IpAddr {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generics_test.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point2` is never constructed
[INFO] [stdout]   --> src/generics_test.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Point2<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]  --> src/generics_test.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn x(&self) -> &T {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/generics_test.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn distance_from_origin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mixup` is never used
[INFO] [stdout]   --> src/generics_test.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn mixup<V, W>(self, other: Point2<V, W>) -> Point2<T, W> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/trait_test.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn notify<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify1` is never used
[INFO] [stdout]   --> src/trait_test.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn notify1(item: impl Summary) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify2` is never used
[INFO] [stdout]   --> src/trait_test.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify3` is never used
[INFO] [stdout]   --> src/trait_test.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify4` is never used
[INFO] [stdout]   --> src/trait_test.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify5` is never used
[INFO] [stdout]   --> src/trait_test.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn notify5<T: Summary + Display>(item1: T) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify6` is never used
[INFO] [stdout]   --> src/trait_test.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn notify6(item1: impl Summary + Display) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]   --> src/trait_test.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function1` is never used
[INFO] [stdout]   --> src/trait_test.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> src/trait_test.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]    --> src/trait_test.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | struct Pair<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/trait_test.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/trait_test.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]  --> src/lifetime_test.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]   --> src/lifetime_test.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `level` is never used
[INFO] [stdout]   --> src/lifetime_test.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `announce_and_return_part` is never used
[INFO] [stdout]   --> src/lifetime_test.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 38 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "db53fd94442dcb0fc9b33c8a8f3645b8bacf35137bda516ca8292d5bc9c6fd38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db53fd94442dcb0fc9b33c8a8f3645b8bacf35137bda516ca8292d5bc9c6fd38", kill_on_drop: false }`
[INFO] [stdout] db53fd94442dcb0fc9b33c8a8f3645b8bacf35137bda516ca8292d5bc9c6fd38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d9c239375b36a21c6f1f5da4da34e6e35a5cdfa09b9bc7a31bfbc6323454224
[INFO] running `Command { std: "docker" "start" "-a" "1d9c239375b36a21c6f1f5da4da34e6e35a5cdfa09b9bc7a31bfbc6323454224", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:71:28
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:71:38
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:73:40
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:73:50
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |                                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:75:16
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:75:37
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:79:38
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn notify5<T: Summary + Display>(item1: T) {}
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rdemo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:80:16
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn notify6(item1: impl Summary + Display) {}
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/trait_test.rs:83:56
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |                                                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/trait_test.rs:83:62
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/trait_test.rs:85:25
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/trait_test.rs:85:31
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]  --> src/enumeration_test.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddr` is never used
[INFO] [stdout]  --> src/enumeration_test.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum IpAddr {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generics_test.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point2` is never constructed
[INFO] [stdout]   --> src/generics_test.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Point2<T, U> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]  --> src/generics_test.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn x(&self) -> &T {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/generics_test.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn distance_from_origin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mixup` is never used
[INFO] [stdout]   --> src/generics_test.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn mixup<V, W>(self, other: Point2<V, W>) -> Point2<T, W> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/trait_test.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn notify<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify1` is never used
[INFO] [stdout]   --> src/trait_test.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn notify1(item: impl Summary) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify2` is never used
[INFO] [stdout]   --> src/trait_test.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify3` is never used
[INFO] [stdout]   --> src/trait_test.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify4` is never used
[INFO] [stdout]   --> src/trait_test.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify5` is never used
[INFO] [stdout]   --> src/trait_test.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn notify5<T: Summary + Display>(item1: T) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify6` is never used
[INFO] [stdout]   --> src/trait_test.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn notify6(item1: impl Summary + Display) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]   --> src/trait_test.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function1` is never used
[INFO] [stdout]   --> src/trait_test.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> src/trait_test.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]    --> src/trait_test.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | struct Pair<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/trait_test.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/trait_test.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]  --> src/lifetime_test.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]   --> src/lifetime_test.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `level` is never used
[INFO] [stdout]   --> src/lifetime_test.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `announce_and_return_part` is never used
[INFO] [stdout]   --> src/lifetime_test.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 38 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/vector_test.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 _ => {}
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]    --> src/owner_scope_test.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let s1 = &mut s;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/string_test.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let mut s = String::new();
[INFO] [stdout]   |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/string_test.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let mut s = "hello world".to_string();
[INFO] [stdout]   |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/string_test.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let mut s = String::from("hello world");
[INFO] [stdout]   |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]   --> src/string_test.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let s3 = s1 + &s2;
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user2`
[INFO] [stdout]   --> src/struct_test.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let user2 = build_user(String::from("a"), String::from("b"));
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user2`
[INFO] [stdout]   --> src/struct_test.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let user2 = User {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `black`
[INFO] [stdout]   --> src/struct_test.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let black = Color(0, 0, 0);
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> src/struct_test.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let origin = Point(0, 0, 0);
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/enumeration_test.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let four = IpAddrKind::V4;
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enumeration_test.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let six = IpAddrKind::V6;
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]   --> src/enumeration_test.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let home = IpAddr::V4(127,0,0,0);
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]   --> src/enumeration_test.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let home = IpAddr::V6(String::from("::1"));
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/enumeration_test.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |         let a = Some(5);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/enumeration_test.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let b = Some("he");
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/enumeration_test.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let c: Option<i32> = None;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enumeration_test.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let six = plus_one(five);
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/enumeration_test.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let none = plus_one(None);
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v2`
[INFO] [stdout]  --> src/vector_test.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |         let v2 = vec![1, 2, 3];
[INFO] [stdout]   |             ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/err_handle_test.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let f = match f {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/err_handle_test.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let f = match f {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/err_handle_test.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let f = File::open("hello.txt").unwrap();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/err_handle_test.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let f = File::open("hello.txt").expect("Failed to open hello.txt");
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:71:28
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:71:38
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:73:40
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:73:50
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |                                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:75:16
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item2`
[INFO] [stdout]   --> src/trait_test.rs:75:37
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:79:38
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn notify5<T: Summary + Display>(item1: T) {}
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item1`
[INFO] [stdout]   --> src/trait_test.rs:80:16
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn notify6(item1: impl Summary + Display) {}
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/trait_test.rs:83:56
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |                                                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/trait_test.rs:83:62
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/trait_test.rs:85:25
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/trait_test.rs:85:31
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lifetime_test.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let i = ImportantExcerpt { part: first_sentence };
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/owner_scope_test.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let mut a = String::from("a");
[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: variable does not need to be mutable
[INFO] [stdout]  --> src/string_test.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let mut s = String::new();
[INFO] [stdout]   |             ----^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/string_test.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let mut s = "hello world".to_string();
[INFO] [stdout]   |             ----^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/string_test.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let mut s = String::from("hello world");
[INFO] [stdout]   |             ----^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/struct_test.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let mut user1 = User {
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/data_test.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut x = 1;
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_string` is never used
[INFO] [stdout]  --> src/string_test.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn create_string() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `username`, `sign_in_count`, and `active` are never read
[INFO] [stdout]  --> src/struct_test.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     struct User {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 4 |         username: String,
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 5 |         email: String,
[INFO] [stdout] 6 |         sign_in_count: u64,
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout] 7 |         active: bool,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKind` is never used
[INFO] [stdout]  --> src/enumeration_test.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum IpAddrKind {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddr` is never used
[INFO] [stdout]  --> src/enumeration_test.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum IpAddr {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_enum` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn create_enum() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enum_method` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn enum_method() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_test` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn option_test() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:50:10
[INFO] [stdout]    |
[INFO] [stdout] 50 |     enum Coin {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stdout]   --> src/enumeration_test.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     enum UsState {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 59 |         Alabama,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 60 |         Alaska,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/enumeration_test.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `one_match` is never used
[INFO] [stdout]    --> src/enumeration_test.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn one_match() {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_let` is never used
[INFO] [stdout]    --> src/enumeration_test.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 |     fn if_let() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_vector` is never used
[INFO] [stdout]  --> src/vector_test.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn create_vector() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_vector` is never used
[INFO] [stdout]   --> src/vector_test.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn read_vector() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insert_hashmap` is never used
[INFO] [stdout]   --> src/hashmap_test.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn insert_hashmap() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unwrap_test` is never used
[INFO] [stdout]   --> src/err_handle_test.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn unwrap_test() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `expect_test` is never used
[INFO] [stdout]   --> src/err_handle_test.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn expect_test() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_result` is never used
[INFO] [stdout]   --> src/err_handle_test.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn return_result() -> Result<String, io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_result_2` is never used
[INFO] [stdout]   --> src/err_handle_test.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn return_result_2() -> Result<String, io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_result_3` is never used
[INFO] [stdout]   --> src/err_handle_test.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn return_result_3() -> Result<String, io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]  --> src/generics_test.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point<T> {
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 2 |     x: T,
[INFO] [stdout] 3 |     y: T,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/generics_test.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn distance_from_origin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest_i32` is never used
[INFO] [stdout]   --> src/generics_test.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn largest_i32(list: &[i32]) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]   --> src/generics_test.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn largest<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/trait_test.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn notify<T: Summary>(item: T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify1` is never used
[INFO] [stdout]   --> src/trait_test.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub fn notify1(item: impl Summary) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify2` is never used
[INFO] [stdout]   --> src/trait_test.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify3` is never used
[INFO] [stdout]   --> src/trait_test.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify4` is never used
[INFO] [stdout]   --> src/trait_test.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify5` is never used
[INFO] [stdout]   --> src/trait_test.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn notify5<T: Summary + Display>(item1: T) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify6` is never used
[INFO] [stdout]   --> src/trait_test.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn notify6(item1: impl Summary + Display) {}
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]   --> src/trait_test.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function1` is never used
[INFO] [stdout]   --> src/trait_test.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> src/trait_test.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]    --> src/trait_test.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | struct Pair<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/trait_test.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]    --> src/trait_test.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]   --> src/lifetime_test.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct ImportantExcerpt<'a> {
[INFO] [stdout]    |        ---------------- field in this struct
[INFO] [stdout] 14 |     part: &'a str,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `level` is never used
[INFO] [stdout]   --> src/lifetime_test.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn level(&self) -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `announce_and_return_part` is never used
[INFO] [stdout]   --> src/lifetime_test.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 85 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "1d9c239375b36a21c6f1f5da4da34e6e35a5cdfa09b9bc7a31bfbc6323454224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d9c239375b36a21c6f1f5da4da34e6e35a5cdfa09b9bc7a31bfbc6323454224", kill_on_drop: false }`
[INFO] [stdout] 1d9c239375b36a21c6f1f5da4da34e6e35a5cdfa09b9bc7a31bfbc6323454224
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5efea42bf1a5ff990cd7ef3b8dd03bae45b3f295a63ade82e1f6771163739bec
[INFO] running `Command { std: "docker" "start" "-a" "5efea42bf1a5ff990cd7ef3b8dd03bae45b3f295a63ade82e1f6771163739bec", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `item1`
[INFO] [stderr]   --> src/trait_test.rs:71:28
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stderr]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item2`
[INFO] [stderr]   --> src/trait_test.rs:71:38
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stderr]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item1`
[INFO] [stderr]   --> src/trait_test.rs:73:40
[INFO] [stderr]    |
[INFO] [stderr] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stderr]    |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item2`
[INFO] [stderr]   --> src/trait_test.rs:73:50
[INFO] [stderr]    |
[INFO] [stderr] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stderr]    |                                                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item1`
[INFO] [stderr]   --> src/trait_test.rs:75:16
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stderr]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item2`
[INFO] [stderr]   --> src/trait_test.rs:75:37
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stderr]    |                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item1`
[INFO] [stderr]   --> src/trait_test.rs:79:38
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub fn notify5<T: Summary + Display>(item1: T) {}
[INFO] [stderr]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item1`
[INFO] [stderr]   --> src/trait_test.rs:80:16
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn notify6(item1: impl Summary + Display) {}
[INFO] [stderr]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/trait_test.rs:83:56
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stderr]    |                                                        ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/trait_test.rs:83:62
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stderr]    |                                                              ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/trait_test.rs:85:25
[INFO] [stderr]    |
[INFO] [stderr] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stderr]    |                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/trait_test.rs:85:31
[INFO] [stderr]    |
[INFO] [stderr] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stderr]    |                               ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: enum `IpAddrKind` is never used
[INFO] [stderr]  --> src/enumeration_test.rs:1:6
[INFO] [stderr]   |
[INFO] [stderr] 1 | enum IpAddrKind {
[INFO] [stderr]   |      ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum `IpAddr` is never used
[INFO] [stderr]  --> src/enumeration_test.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | enum IpAddr {
[INFO] [stderr]   |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Message` is never used
[INFO] [stderr]   --> src/enumeration_test.rs:12:6
[INFO] [stderr]    |
[INFO] [stderr] 12 | enum Message {
[INFO] [stderr]    |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `call` is never used
[INFO] [stderr]   --> src/enumeration_test.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn call(&self) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]  --> src/generics_test.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Point<T> {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point2` is never constructed
[INFO] [stderr]   --> src/generics_test.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | struct Point2<T, U> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `x` is never used
[INFO] [stderr]  --> src/generics_test.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn x(&self) -> &T {
[INFO] [stderr]   |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: method `distance_from_origin` is never used
[INFO] [stderr]   --> src/generics_test.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn distance_from_origin(&self) -> f32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `mixup` is never used
[INFO] [stderr]   --> src/generics_test.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn mixup<V, W>(self, other: Point2<V, W>) -> Point2<T, W> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify` is never used
[INFO] [stderr]   --> src/trait_test.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn notify<T: Summary>(item: T) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify1` is never used
[INFO] [stderr]   --> src/trait_test.rs:65:8
[INFO] [stderr]    |
[INFO] [stderr] 65 | pub fn notify1(item: impl Summary) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify2` is never used
[INFO] [stderr]   --> src/trait_test.rs:71:8
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify3` is never used
[INFO] [stderr]   --> src/trait_test.rs:73:8
[INFO] [stderr]    |
[INFO] [stderr] 73 | pub fn notify3<T: Summary, E: Summary>(item1: T, item2: E) {}
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify4` is never used
[INFO] [stderr]   --> src/trait_test.rs:75:8
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn notify4(item1: impl Summary, item2: impl Summary) {}
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify5` is never used
[INFO] [stderr]   --> src/trait_test.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub fn notify5<T: Summary + Display>(item1: T) {}
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify6` is never used
[INFO] [stderr]   --> src/trait_test.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn notify6(item1: impl Summary + Display) {}
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `some_function` is never used
[INFO] [stderr]   --> src/trait_test.rs:83:4
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn some_function<T: Display + Clone, U: Clone + Debug>(t: T, u: U) {}
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `some_function1` is never used
[INFO] [stderr]   --> src/trait_test.rs:85:4
[INFO] [stderr]    |
[INFO] [stderr] 85 | fn some_function1<T, U>(t: T, u: U)
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `returns_summarizable` is never used
[INFO] [stderr]   --> src/trait_test.rs:95:4
[INFO] [stderr]    |
[INFO] [stderr] 95 | fn returns_summarizable() -> impl Summary {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pair` is never constructed
[INFO] [stderr]    --> src/trait_test.rs:105:8
[INFO] [stderr]     |
[INFO] [stderr] 105 | struct Pair<T> {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/trait_test.rs:111:8
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn new(x: T, y: T) -> Self {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `cmp_display` is never used
[INFO] [stderr]    --> src/trait_test.rs:121:8
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest` is never used
[INFO] [stderr]  --> src/lifetime_test.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stderr]   --> src/lifetime_test.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct ImportantExcerpt<'a> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `level` is never used
[INFO] [stderr]   --> src/lifetime_test.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn level(&self) -> i32 {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `announce_and_return_part` is never used
[INFO] [stderr]   --> src/lifetime_test.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rdemo` (lib) generated 38 warnings (run `cargo fix --lib -p rdemo` to apply 12 suggestions)
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/vector_test.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 _ => {}
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]    --> src/owner_scope_test.rs:125:13
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let s1 = &mut s;
[INFO] [stderr]     |             ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]  --> src/string_test.rs:5:17
[INFO] [stderr]   |
[INFO] [stderr] 5 |         let mut s = String::new();
[INFO] [stderr]   |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]  --> src/string_test.rs:6:17
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let mut s = "hello world".to_string();
[INFO] [stderr]   |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]  --> src/string_test.rs:7:17
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let mut s = String::from("hello world");
[INFO] [stderr]   |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s3`
[INFO] [stderr]   --> src/string_test.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let s3 = s1 + &s2;
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user2`
[INFO] [stderr]   --> src/struct_test.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let user2 = build_user(String::from("a"), String::from("b"));
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user2`
[INFO] [stderr]   --> src/struct_test.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let user2 = User {
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `black`
[INFO] [stderr]   --> src/struct_test.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let black = Color(0, 0, 0);
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin`
[INFO] [stderr]   --> src/struct_test.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let origin = Point(0, 0, 0);
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]   --> src/enumeration_test.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let four = IpAddrKind::V4;
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]   --> src/enumeration_test.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |         let six = IpAddrKind::V6;
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `home`
[INFO] [stderr]   --> src/enumeration_test.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let home = IpAddr::V4(127,0,0,0);
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `home`
[INFO] [stderr]   --> src/enumeration_test.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         let home = IpAddr::V6(String::from("::1"));
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/enumeration_test.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |         let a = Some(5);
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/enumeration_test.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let b = Some("he");
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/enumeration_test.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let c: Option<i32> = None;
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]   --> src/enumeration_test.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let six = plus_one(five);
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `none`
[INFO] [stderr]   --> src/enumeration_test.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |         let none = plus_one(None);
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v2`
[INFO] [stderr]  --> src/vector_test.rs:4:13
[INFO] [stderr]   |
[INFO] [stderr] 4 |         let v2 = vec![1, 2, 3];
[INFO] [stderr]   |             ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/err_handle_test.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let f = match f {
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/err_handle_test.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let f = match f {
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/err_handle_test.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let f = File::open("hello.txt").unwrap();
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/err_handle_test.rs:41:13
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let f = File::open("hello.txt").expect("Failed to open hello.txt");
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item1`
[INFO] [stderr]   --> src/trait_test.rs:71:28
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn notify2<T: Summary>(item1: T, item2: T) {}
[INFO] [stderr]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/lifetime_test.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let i = ImportantExcerpt { part: first_sentence };
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/owner_scope_test.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |         let mut a = String::from("a");
[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: variable does not need to be mutable
[INFO] [stderr]  --> src/string_test.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 |         let mut s = String::new();
[INFO] [stderr]   |             ----^
[INFO] [stderr]   |             |
[INFO] [stderr]   |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/string_test.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let mut s = "hello world".to_string();
[INFO] [stderr]   |             ----^
[INFO] [stderr]   |             |
[INFO] [stderr]   |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/string_test.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let mut s = String::from("hello world");
[INFO] [stderr]   |             ----^
[INFO] [stderr]   |             |
[INFO] [stderr]   |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/struct_test.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let mut user1 = User {
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/data_test.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let mut x = 1;
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function `create_string` is never used
[INFO] [stderr]  --> src/string_test.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 |     fn create_string() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `username`, `sign_in_count`, and `active` are never read
[INFO] [stderr]  --> src/struct_test.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     struct User {
[INFO] [stderr]   |            ---- fields in this struct
[INFO] [stderr] 4 |         username: String,
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr] 5 |         email: String,
[INFO] [stderr] 6 |         sign_in_count: u64,
[INFO] [stderr]   |         ^^^^^^^^^^^^^
[INFO] [stderr] 7 |         active: bool,
[INFO] [stderr]   |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `IpAddrKind` is never used
[INFO] [stderr]  --> src/enumeration_test.rs:1:6
[INFO] [stderr]   |
[INFO] [stderr] 1 | enum IpAddrKind {
[INFO] [stderr]   |      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `create_enum` is never used
[INFO] [stderr]   --> src/enumeration_test.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn create_enum() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enum_method` is never used
[INFO] [stderr]   --> src/enumeration_test.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn enum_method() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `option_test` is never used
[INFO] [stderr]   --> src/enumeration_test.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn option_test() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Coin` is never used
[INFO] [stderr]   --> src/enumeration_test.rs:50:10
[INFO] [stderr]    |
[INFO] [stderr] 50 |     enum Coin {
[INFO] [stderr]    |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stderr]   --> src/enumeration_test.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |     enum UsState {
[INFO] [stderr]    |          ------- variants in this enum
[INFO] [stderr] 59 |         Alabama,
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr] 60 |         Alaska,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `value_in_cents` is never used
[INFO] [stderr]   --> src/enumeration_test.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `one_match` is never used
[INFO] [stderr]    --> src/enumeration_test.rs:105:8
[INFO] [stderr]     |
[INFO] [stderr] 105 |     fn one_match() {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `if_let` is never used
[INFO] [stderr]    --> src/enumeration_test.rs:113:8
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn if_let() {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `create_vector` is never used
[INFO] [stderr]  --> src/vector_test.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 |     fn create_vector() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_vector` is never used
[INFO] [stderr]   --> src/vector_test.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn read_vector() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `insert_hashmap` is never used
[INFO] [stderr]   --> src/hashmap_test.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn insert_hashmap() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `unwrap_test` is never used
[INFO] [stderr]   --> src/err_handle_test.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn unwrap_test() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `expect_test` is never used
[INFO] [stderr]   --> src/err_handle_test.rs:40:8
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn expect_test() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `return_result` is never used
[INFO] [stderr]   --> src/err_handle_test.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn return_result() -> Result<String, io::Error> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `return_result_2` is never used
[INFO] [stderr]   --> src/err_handle_test.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn return_result_2() -> Result<String, io::Error> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `return_result_3` is never used
[INFO] [stderr]   --> src/err_handle_test.rs:68:8
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn return_result_3() -> Result<String, io::Error> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `y` is never read
[INFO] [stderr]  --> src/generics_test.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Point<T> {
[INFO] [stderr]   |        ----- field in this struct
[INFO] [stderr] 2 |     x: T,
[INFO] [stderr] 3 |     y: T,
[INFO] [stderr]   |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: function `largest_i32` is never used
[INFO] [stderr]   --> src/generics_test.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn largest_i32(list: &[i32]) -> i32 {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `largest` is never used
[INFO] [stderr]   --> src/generics_test.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn largest<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `part` is never read
[INFO] [stderr]   --> src/lifetime_test.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct ImportantExcerpt<'a> {
[INFO] [stderr]    |        ---------------- field in this struct
[INFO] [stderr] 14 |     part: &'a str,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rdemo` (lib test) generated 85 warnings (30 duplicates) (run `cargo fix --lib -p rdemo --tests` to apply 31 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rdemo-69b3b35db481deb2)
[INFO] [stdout] running 56 tests
[INFO] [stdout] test bytes_test::tests::hex_test ... ok
[INFO] [stdout] test data_test::tests::mut_var ... ok
[INFO] [stdout] test data_test::tests::array ... ok
[INFO] [stdout] test bytes_test::tests::print_char111 ... ok
[INFO] [stdout] test data_test::tests::transform_var ... ok
[INFO] [stdout] test data_test::tests::tuple ... ok
[INFO] [stdout] test data_test::tests::loop_test ... ok
[INFO] [stdout] test data_test::tests::for_test ... ok
[INFO] [stdout] test enumeration_test::tests::default_match ... ok
[INFO] [stdout] test data_test::tests::shadow_var ... ok
[INFO] [stdout] test generics_test::tests::test_mixup ... ok
[INFO] [stdout] test generics_test::tests::test_point ... ok
[INFO] [stdout] test enumeration_test::tests::plus_one_test ... ok
[INFO] [stdout] test data_test::tests::while_test ... ok
[INFO] [stdout] test hashmap_test::tests::create_hashmap ... ok
[INFO] [stdout] test hashmap_test::tests::read_hashmap ... ok
[INFO] [stdout] test lifetime_test::tests::lifetime_test1 ... ok
[INFO] [stdout] test hashmap_test::tests::traverse_hashmap ... ok
[INFO] [stdout] test hashmap_test::tests::update_when_exist ... ok
[INFO] [stdout] test owner_scope_test::tests::borrow_and_return_test ... ok
[INFO] [stdout] test owner_scope_test::tests::clone_test ... ok
[INFO] [stdout] test owner_scope_test::tests::copy_test ... ok
[INFO] [stdout] test owner_scope_test::tests::first_world_better_test ... ok
[INFO] [stdout] test owner_scope_test::tests::first_world_test ... ok
[INFO] [stdout] test owner_scope_test::tests::move_test ... ok
[INFO] [stdout] test owner_scope_test::tests::mut_reference_test ... ok
[INFO] [stdout] test owner_scope_test::tests::my_test ... ok
[INFO] [stdout] test owner_scope_test::tests::string_slice ... ok
[INFO] [stdout] test owner_scope_test::tests::take_owner_ship_test ... ok
[INFO] [stdout] test owner_scope_test::tests::unmut_reference_test ... ok
[INFO] [stdout] test slice_test::tests::array_and_slice ... ok
[INFO] [stdout] test slice_test::tests::first_word_test ... ok
[INFO] [stdout] test slice_test::tests::first_word_test_v2 ... ok
[INFO] [stdout] test slice_test::tests::string_slice ... ok
[INFO] [stdout] test slice_test::tests::traverse_slice ... ok
[INFO] [stdout] test string_test::tests::for1 ... ok
[INFO] [stdout] test lifetime_test::tests::lifetime_test ... ok
[INFO] [stdout] test hashmap_test::tests::insert_when_absent ... ok
[INFO] [stdout] test string_test::tests::for2 ... ok
[INFO] [stdout] test string_test::tests::join_string1 ... ok
[INFO] [stdout] test string_test::tests::for4 ... ok
[INFO] [stdout] test string_test::tests::join_string2 ... ok
[INFO] [stdout] test struct_test::tests::create_tuple_struct ... ok
[INFO] [stdout] test struct_test::tests::train_test4 ... ok
[INFO] [stdout] test struct_test::tests::trait_test ... ok
[INFO] [stdout] test struct_test::tests::trait_test2 ... ok
[INFO] [stdout] test string_test::tests::for3 ... ok
[INFO] [stdout] test struct_test::tests::create_struct_from_other_struct ... ok
[INFO] [stdout] test struct_test::tests::associated_function_test ... ok
[INFO] [stdout] test struct_test::tests::create_struct ... ok
[INFO] [stdout] test struct_test::tests::trait_test3 ... ok
[INFO] [stdout] test vector_test::tests::traverse_vector ... ok
[INFO] [stdout] test vector_test::tests::store_different_type_in_vector ... ok
[INFO] [stdout] test trait_test::tests::summary_test ... ok
[INFO] [stdout] test err_handle_test::tests::result_test ... FAILED
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stdout] test err_handle_test::tests::multi_err_test ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- err_handle_test::tests::result_test stdout ----
[INFO] [stdout] thread 'err_handle_test::tests::result_test' panicked at 'Problem opening the file: Os { code: 2, kind: NotFound, message: "No such file or directory" }', src/err_handle_test.rs:15:17
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x56189e76caba - std::backtrace_rs::backtrace::libunwind::trace::ha9053a9a07ca49cb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x56189e76caba - std::backtrace_rs::backtrace::trace_unsynchronized::h9c2852a457ad564e
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x56189e76caba - std::sys_common::backtrace::_print_fmt::h457936fbfaa0070f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x56189e76caba - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5779d7bf7f70cb0c
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x56189e7904ae - core::fmt::write::h5a4baaff1bcd3eb5
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/fmt/mod.rs:1232:17
[INFO] [stdout]    5:     0x56189e769f35 - std::io::Write::write_fmt::h478f79c628ef31d1
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/io/mod.rs:1684:15
[INFO] [stdout]    6:     0x56189e76c885 - std::sys_common::backtrace::_print::h5fcdc36060f177e8
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x56189e76c885 - std::sys_common::backtrace::print::h54ca9458b876c8bf
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x56189e76e64f - std::panicking::default_hook::{{closure}}::hbe471161c7664ed6
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:271:22
[INFO] [stdout]    9:     0x56189e76e30f - std::panicking::default_hook::ha3500da57aa4ac4f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:287:9
[INFO] [stdout]   10:     0x56189e741027 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hdf1b89dd137ece34
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
[INFO] [stdout]   11:     0x56189e741027 - test::test_main::{{closure}}::h9081a79f20e75698
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:135:21
[INFO] [stdout]   12:     0x56189e76ed7d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6507bddc3eebb4a5
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
[INFO] [stdout]   13:     0x56189e76ed7d - std::panicking::rust_panic_with_hook::h50c09d000dc561d2
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:696:13
[INFO] [stdout]   14:     0x56189e76eaf9 - std::panicking::begin_panic_handler::{{closure}}::h9e2b2176e00e0d9c
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:583:13
[INFO] [stdout]   15:     0x56189e76cf26 - std::sys_common::backtrace::__rust_end_short_backtrace::h5739b8e512c09d02
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:150:18
[INFO] [stdout]   16:     0x56189e76e802 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:579:5
[INFO] [stdout]   17:     0x56189e6f0b83 - core::panicking::panic_fmt::hf33a1475b4dc5c3e
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panicking.rs:64:14
[INFO] [stdout]   18:     0x56189e70f86c - rdemo::err_handle_test::tests::result_test::hd2351dae6ea16315
[INFO] [stdout]                                at /opt/rustwide/workdir/src/err_handle_test.rs:15:17
[INFO] [stdout]   19:     0x56189e70f787 - rdemo::err_handle_test::tests::result_test::{{closure}}::h9d63a9dfc56800df
[INFO] [stdout]                                at /opt/rustwide/workdir/src/err_handle_test.rs:10:22
[INFO] [stdout]   20:     0x56189e70b765 - core::ops::function::FnOnce::call_once::hc4ae97e649352d57
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   21:     0x56189e74640f - core::ops::function::FnOnce::call_once::h7d969581be7d0075
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x56189e74640f - test::__rust_begin_short_backtrace::hca25a52684e56655
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:656:18
[INFO] [stdout]   23:     0x56189e717a2c - test::run_test::{{closure}}::ha8ac744c4af1a4bb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:647:30
[INFO] [stdout]   24:     0x56189e717a2c - core::ops::function::FnOnce::call_once{{vtable.shim}}::h7b411a9ed45bdecf
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x56189e7453d6 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd05328869a8ed200
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   26:     0x56189e7453d6 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0c601ce20bd5b2be
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   27:     0x56189e7453d6 - std::panicking::try::do_call::ha4be5c164fe30854
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:487:40
[INFO] [stdout]   28:     0x56189e7453d6 - std::panicking::try::h604546f3609af05f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:451:19
[INFO] [stdout]   29:     0x56189e7453d6 - std::panic::catch_unwind::h5bfa8afe44c9c2f9
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panic.rs:140:14
[INFO] [stdout]   30:     0x56189e7453d6 - test::run_test_in_process::hd50dee55dd63e6aa
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:679:27
[INFO] [stdout]   31:     0x56189e7453d6 - test::run_test::run_test_inner::{{closure}}::h4aa0f433aa85cea8
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:573:39
[INFO] [stdout]   32:     0x56189e7120a1 - test::run_test::run_test_inner::{{closure}}::had56431adf24b4d6
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:600:37
[INFO] [stdout]   33:     0x56189e7120a1 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha8d9890e0c73bf13
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:134:18
[INFO] [stdout]   34:     0x56189e717abb - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h251832bcb4a95327
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/thread/mod.rs:560:17
[INFO] [stdout]   35:     0x56189e717abb - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8fdff598fa414831
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   36:     0x56189e717abb - std::panicking::try::do_call::h455dd2f7764a950f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:487:40
[INFO] [stdout]   37:     0x56189e717abb - std::panicking::try::had6f23b7b73ae72a
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:451:19
[INFO] [stdout]   38:     0x56189e717abb - std::panic::catch_unwind::ha6a5ca3915b4dad0
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panic.rs:140:14
[INFO] [stdout]   39:     0x56189e717abb - std::thread::Builder::spawn_unchecked_::{{closure}}::h883b72ef75da6231
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x56189e717abb - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb7dff73dc8bd2ccb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x56189e7730e3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h39990b24eedef2ab
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   42:     0x56189e7730e3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h01a027258444143b
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   43:     0x56189e7730e3 - std::sys::unix::thread::Thread::new::thread_start::ha4f1cdd9c25884ba
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   44:     0x7fc52e9c9b43 - <unknown>
[INFO] [stdout]   45:     0x7fc52ea5abb4 - __clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- err_handle_test::tests::multi_err_test stdout ----
[INFO] [stdout] thread 'err_handle_test::tests::multi_err_test' panicked at 'Problem creating the file: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }', src/err_handle_test.rs:28:31
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x56189e76caba - std::backtrace_rs::backtrace::libunwind::trace::ha9053a9a07ca49cb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x56189e76caba - std::backtrace_rs::backtrace::trace_unsynchronized::h9c2852a457ad564e
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x56189e76caba - std::sys_common::backtrace::_print_fmt::h457936fbfaa0070f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x56189e76caba - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5779d7bf7f70cb0c
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x56189e7904ae - core::fmt::write::h5a4baaff1bcd3eb5
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/fmt/mod.rs:1232:17
[INFO] [stdout]    5:     0x56189e769f35 - std::io::Write::write_fmt::h478f79c628ef31d1
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/io/mod.rs:1684:15
[INFO] [stdout]    6:     0x56189e76c885 - std::sys_common::backtrace::_print::h5fcdc36060f177e8
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x56189e76c885 - std::sys_common::backtrace::print::h54ca9458b876c8bf
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x56189e76e64f - std::panicking::default_hook::{{closure}}::hbe471161c7664ed6
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:271:22
[INFO] [stdout]    9:     0x56189e76e30f - std::panicking::default_hook::ha3500da57aa4ac4f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:287:9
[INFO] [stdout]   10:     0x56189e741027 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hdf1b89dd137ece34
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
[INFO] [stdout]   11:     0x56189e741027 - test::test_main::{{closure}}::h9081a79f20e75698
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:135:21
[INFO] [stdout]   12:     0x56189e76ed7d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6507bddc3eebb4a5
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:2001:9
[INFO] [stdout]   13:     0x56189e76ed7d - std::panicking::rust_panic_with_hook::h50c09d000dc561d2
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:696:13
[INFO] [stdout]   14:     0x56189e76eaf9 - std::panicking::begin_panic_handler::{{closure}}::h9e2b2176e00e0d9c
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:583:13
[INFO] [stdout]   15:     0x56189e76cf26 - std::sys_common::backtrace::__rust_end_short_backtrace::h5739b8e512c09d02
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:150:18
[INFO] [stdout]   16:     0x56189e76e802 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:579:5
[INFO] [stdout]   17:     0x56189e6f0b83 - core::panicking::panic_fmt::hf33a1475b4dc5c3e
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panicking.rs:64:14
[INFO] [stdout]   18:     0x56189e70faa7 - rdemo::err_handle_test::tests::multi_err_test::h1e34a6cada7718d8
[INFO] [stdout]                                at /opt/rustwide/workdir/src/err_handle_test.rs:28:31
[INFO] [stdout]   19:     0x56189e70f8a7 - rdemo::err_handle_test::tests::multi_err_test::{{closure}}::ha431c5f3ca72c998
[INFO] [stdout]                                at /opt/rustwide/workdir/src/err_handle_test.rs:21:25
[INFO] [stdout]   20:     0x56189e70b485 - core::ops::function::FnOnce::call_once::h946fa15d41d5c248
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   21:     0x56189e74640f - core::ops::function::FnOnce::call_once::h7d969581be7d0075
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x56189e74640f - test::__rust_begin_short_backtrace::hca25a52684e56655
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:656:18
[INFO] [stdout]   23:     0x56189e717a2c - test::run_test::{{closure}}::ha8ac744c4af1a4bb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:647:30
[INFO] [stdout]   24:     0x56189e717a2c - core::ops::function::FnOnce::call_once{{vtable.shim}}::h7b411a9ed45bdecf
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x56189e7453d6 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd05328869a8ed200
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   26:     0x56189e7453d6 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0c601ce20bd5b2be
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   27:     0x56189e7453d6 - std::panicking::try::do_call::ha4be5c164fe30854
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:487:40
[INFO] [stdout]   28:     0x56189e7453d6 - std::panicking::try::h604546f3609af05f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:451:19
[INFO] [stdout]   29:     0x56189e7453d6 - std::panic::catch_unwind::h5bfa8afe44c9c2f9
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panic.rs:140:14
[INFO] [stdout]   30:     0x56189e7453d6 - test::run_test_in_process::hd50dee55dd63e6aa
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:679:27
[INFO] [stdout]   31:     0x56189e7453d6 - test::run_test::run_test_inner::{{closure}}::h4aa0f433aa85cea8
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:573:39
[INFO] [stdout]   32:     0x56189e7120a1 - test::run_test::run_test_inner::{{closure}}::had56431adf24b4d6
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/test/src/lib.rs:600:37
[INFO] [stdout]   33:     0x56189e7120a1 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha8d9890e0c73bf13
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys_common/backtrace.rs:134:18
[INFO] [stdout]   34:     0x56189e717abb - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h251832bcb4a95327
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/thread/mod.rs:560:17
[INFO] [stdout]   35:     0x56189e717abb - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h8fdff598fa414831
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/panic/unwind_safe.rs:271:9
[INFO] [stdout]   36:     0x56189e717abb - std::panicking::try::do_call::h455dd2f7764a950f
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:487:40
[INFO] [stdout]   37:     0x56189e717abb - std::panicking::try::had6f23b7b73ae72a
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panicking.rs:451:19
[INFO] [stdout]   38:     0x56189e717abb - std::panic::catch_unwind::ha6a5ca3915b4dad0
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/panic.rs:140:14
[INFO] [stdout]   39:     0x56189e717abb - std::thread::Builder::spawn_unchecked_::{{closure}}::h883b72ef75da6231
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x56189e717abb - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb7dff73dc8bd2ccb
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x56189e7730e3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h39990b24eedef2ab
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   42:     0x56189e7730e3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h01a027258444143b
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
[INFO] [stdout]   43:     0x56189e7730e3 - std::sys::unix::thread::Thread::new::thread_start::ha4f1cdd9c25884ba
[INFO] [stdout]                                at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   44:     0x7fc52e9c9b43 - <unknown>
[INFO] [stdout]   45:     0x7fc52ea5abb4 - __clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     err_handle_test::tests::multi_err_test
[INFO] [stdout]     err_handle_test::tests::result_test
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 54 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5efea42bf1a5ff990cd7ef3b8dd03bae45b3f295a63ade82e1f6771163739bec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5efea42bf1a5ff990cd7ef3b8dd03bae45b3f295a63ade82e1f6771163739bec", kill_on_drop: false }`
[INFO] [stdout] 5efea42bf1a5ff990cd7ef3b8dd03bae45b3f295a63ade82e1f6771163739bec
