[INFO] cloning repository https://github.com/HongxuanG/learn_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HongxuanG/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHongxuanG%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHongxuanG%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e2af975163be982b47bb919927152030f07672f9
[INFO] testing HongxuanG/learn_rust against 1.75.0 for beta-1.76-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHongxuanG%2Flearn_rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HongxuanG/learn_rust on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/HongxuanG/learn_rust
[INFO] finished tweaking git repo https://github.com/HongxuanG/learn_rust
[INFO] tweaked toml for git repo https://github.com/HongxuanG/learn_rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/HongxuanG/learn_rust 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/bjz/color-rs`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8_slice v1.0.0
[INFO] [stderr]   Downloaded angle v0.1.55555
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e888e82bb7da7fb990254135fb88b99e4b866f9b1ace915c709575f90015d83
[INFO] running `Command { std: "docker" "start" "-a" "8e888e82bb7da7fb990254135fb88b99e4b866f9b1ace915c709575f90015d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e888e82bb7da7fb990254135fb88b99e4b866f9b1ace915c709575f90015d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e888e82bb7da7fb990254135fb88b99e4b866f9b1ace915c709575f90015d83", kill_on_drop: false }`
[INFO] [stdout] 8e888e82bb7da7fb990254135fb88b99e4b866f9b1ace915c709575f90015d83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3d61f3305e1a6a7bdd664b4647c31eae1fbd31252c3f32236251c9b9a02ee7e
[INFO] running `Command { std: "docker" "start" "-a" "a3d61f3305e1a6a7bdd664b4647c31eae1fbd31252c3f32236251c9b9a02ee7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling utf8_slice v1.0.0
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling angle v0.1.55555
[INFO] [stderr]    Compiling color v0.0.2 (https://github.com/bjz/color-rs#c39c52a4)
[INFO] [stderr]    Compiling world_hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]   --> src/lib.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::io::{self, Write};
[INFO] [stdout]    |               ^^^^  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::*`
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use rand::*;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:90:28
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn some_function<T, U>(t: T, u: U)
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/lib.rs:90:34
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn some_function<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: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Tweet {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 53 |     reply: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 54 |     retweet: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/lib.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/lib.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | impl<T> Pair<T> {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 104 |     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/lib.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]     | ------------------------------------- method in this implementation
[INFO] [stdout] 110 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `finally` is never used
[INFO] [stdout]  --> src/break_up_mod/second_floor_break_up.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn finally() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.04s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "a3d61f3305e1a6a7bdd664b4647c31eae1fbd31252c3f32236251c9b9a02ee7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3d61f3305e1a6a7bdd664b4647c31eae1fbd31252c3f32236251c9b9a02ee7e", kill_on_drop: false }`
[INFO] [stdout] a3d61f3305e1a6a7bdd664b4647c31eae1fbd31252c3f32236251c9b9a02ee7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01b8fcebee595dbb80075e9fc0d50dc70b784615f325f1dc7fd507ae6ffb8450
[INFO] running `Command { std: "docker" "start" "-a" "01b8fcebee595dbb80075e9fc0d50dc70b784615f325f1dc7fd507ae6ffb8450", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]   --> src/lib.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::io::{self, Write};
[INFO] [stdout]    |               ^^^^  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::*`
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use rand::*;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:90:28
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn some_function<T, U>(t: T, u: U)
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/lib.rs:90:34
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn some_function<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: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Tweet {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 53 |     reply: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 54 |     retweet: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/lib.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/lib.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | impl<T> Pair<T> {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 104 |     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/lib.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]     | ------------------------------------- method in this implementation
[INFO] [stdout] 110 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling world_hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `finally` is never used
[INFO] [stdout]  --> src/break_up_mod/second_floor_break_up.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn finally() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]   --> src/lib.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::io::{self, Write};
[INFO] [stdout]    |               ^^^^  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::*`
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use rand::*;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:90:28
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn some_function<T, U>(t: T, u: U)
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/lib.rs:90:34
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn some_function<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: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/lib.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Tweet {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 53 |     reply: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 54 |     retweet: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/lib.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/lib.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | impl<T> Pair<T> {
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 104 |     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/lib.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]     | ------------------------------------- method in this implementation
[INFO] [stdout] 110 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `finally` is never used
[INFO] [stdout]  --> src/break_up_mod/second_floor_break_up.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn finally() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "01b8fcebee595dbb80075e9fc0d50dc70b784615f325f1dc7fd507ae6ffb8450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01b8fcebee595dbb80075e9fc0d50dc70b784615f325f1dc7fd507ae6ffb8450", kill_on_drop: false }`
[INFO] [stdout] 01b8fcebee595dbb80075e9fc0d50dc70b784615f325f1dc7fd507ae6ffb8450
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 61cb8efeaee90691a2d229be656027e8bcdecad292bf9ac6cd187128429e0fd7
[INFO] running `Command { std: "docker" "start" "-a" "61cb8efeaee90691a2d229be656027e8bcdecad292bf9ac6cd187128429e0fd7", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Write`, `self`
[INFO] [stderr]   --> src/lib.rs:18:15
[INFO] [stderr]    |
[INFO] [stderr] 18 | use std::io::{self, Write};
[INFO] [stderr]    |               ^^^^  ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::*`
[INFO] [stderr]   --> src/lib.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 | use rand::*;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/lib.rs:90:28
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn some_function<T, U>(t: T, u: U)
[INFO] [stderr]    |                            ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/lib.rs:90:34
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn some_function<T, U>(t: T, u: U)
[INFO] [stderr]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `reply` and `retweet` are never read
[INFO] [stderr]   --> src/lib.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 50 | struct Tweet {
[INFO] [stderr]    |        ----- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 53 |     reply: bool,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 54 |     retweet: bool,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pair` is never constructed
[INFO] [stderr]   --> src/lib.rs:98:8
[INFO] [stderr]    |
[INFO] [stderr] 98 | struct Pair<T> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/lib.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 103 | impl<T> Pair<T> {
[INFO] [stderr]     | --------------- associated function in this implementation
[INFO] [stderr] 104 |     fn new(x: T, y: T) -> Self {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `cmp_display` is never used
[INFO] [stderr]    --> src/lib.rs:110:8
[INFO] [stderr]     |
[INFO] [stderr] 109 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stderr]     | ------------------------------------- method in this implementation
[INFO] [stderr] 110 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `finally` is never used
[INFO] [stderr]  --> src/break_up_mod/second_floor_break_up.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn finally() {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `world_hello` (lib) generated 9 warnings (run `cargo fix --lib -p world_hello` to apply 4 suggestions)
[INFO] [stderr] warning: `world_hello` (lib test) generated 9 warnings (9 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/world_hello-4c960bd4faeba80d)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/world_hello-211527bae1b886b6)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests world_hello
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "61cb8efeaee90691a2d229be656027e8bcdecad292bf9ac6cd187128429e0fd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61cb8efeaee90691a2d229be656027e8bcdecad292bf9ac6cd187128429e0fd7", kill_on_drop: false }`
[INFO] [stdout] 61cb8efeaee90691a2d229be656027e8bcdecad292bf9ac6cd187128429e0fd7
