[INFO] cloning repository https://github.com/polunzh/rust-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/polunzh/rust-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolunzh%2Frust-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolunzh%2Frust-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 21e3bd366cb3d0fc9a0bca59fef1d5b696f1b7bb
[INFO] testing polunzh/rust-demo against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolunzh%2Frust-demo" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/polunzh/rust-demo on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/polunzh/rust-demo
[INFO] finished tweaking git repo https://github.com/polunzh/rust-demo
[INFO] tweaked toml for git repo https://github.com/polunzh/rust-demo written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/polunzh/rust-demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c71ac952e42ca3cb191025e38715a33f716f1430eb2e42cf6ff8dab33634380
[INFO] running `Command { std: "docker" "start" "-a" "2c71ac952e42ca3cb191025e38715a33f716f1430eb2e42cf6ff8dab33634380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c71ac952e42ca3cb191025e38715a33f716f1430eb2e42cf6ff8dab33634380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c71ac952e42ca3cb191025e38715a33f716f1430eb2e42cf6ff8dab33634380", kill_on_drop: false }`
[INFO] [stdout] 2c71ac952e42ca3cb191025e38715a33f716f1430eb2e42cf6ff8dab33634380
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 472fe7369b656650ba61e3bce43bb8820dcfb2fd2b5d66718e6e3f87e088ce64
[INFO] running `Command { std: "docker" "start" "-a" "472fe7369b656650ba61e3bce43bb8820dcfb2fd2b5d66718e6e3f87e088ce64", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling integer v0.1.0 (/opt/rustwide/workdir/integer)
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir/variables)
[INFO] [stderr]    Compiling function v0.1.0 (/opt/rustwide/workdir/function)
[INFO] [stderr]    Compiling compound v0.1.0 (/opt/rustwide/workdir/compound)
[INFO] [stderr]    Compiling slice v0.1.0 (/opt/rustwide/workdir/slice)
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir/hello_world)
[INFO] [stderr]    Compiling enum_demo v0.1.0 (/opt/rustwide/workdir/enum_demo)
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]    Compiling match_demo v0.1.0 (/opt/rustwide/workdir/match_demo)
[INFO] [stderr]    Compiling control-flow v0.1.0 (/opt/rustwide/workdir/control-flow)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> integer/src/main.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 |   let a: i8 = 127;
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> integer/src/main.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 |   let a: i8 = -127;
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> integer/src/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 |   let a: u8 = 255;
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> function/src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     y + 5; // 语句
[INFO] [stdout]    |     ^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let _ = y + 5; // 语句
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]   --> match_demo/src/main.rs:55:11
[INFO] [stdout]    |
[INFO] [stdout] 55 |   let mut count = 0;
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]   --> match_demo/src/main.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 |     count += 1;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]  --> match_demo/src/main.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 |   Penny,
[INFO] [stdout]   |   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]  --> match_demo/src/main.rs:9:3
[INFO] [stdout]   |
[INFO] [stdout] 9 |   Nickel,
[INFO] [stdout]   |   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dim`
[INFO] [stdout]   --> match_demo/src/main.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 10 |   Dim,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `IpAddrKind1`
[INFO] [stdout]  --> enum_demo/src/main.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum IpAddrKind1 {
[INFO] [stdout]   |      ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]  --> enum_demo/src/main.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 |   V6(String),
[INFO] [stdout]   |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.72s
[INFO] running `Command { std: "docker" "inspect" "472fe7369b656650ba61e3bce43bb8820dcfb2fd2b5d66718e6e3f87e088ce64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "472fe7369b656650ba61e3bce43bb8820dcfb2fd2b5d66718e6e3f87e088ce64", kill_on_drop: false }`
[INFO] [stdout] 472fe7369b656650ba61e3bce43bb8820dcfb2fd2b5d66718e6e3f87e088ce64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44249dce55ddd6b60472e815a5b1ba5a6ef2d010ff96b39bc5f54c5c26577a88
[INFO] running `Command { std: "docker" "start" "-a" "44249dce55ddd6b60472e815a5b1ba5a6ef2d010ff96b39bc5f54c5c26577a88", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling match_demo v0.1.0 (/opt/rustwide/workdir/match_demo)
[INFO] [stderr]    Compiling enum_demo v0.1.0 (/opt/rustwide/workdir/enum_demo)
[INFO] [stderr]    Compiling function v0.1.0 (/opt/rustwide/workdir/function)
[INFO] [stderr]    Compiling slice v0.1.0 (/opt/rustwide/workdir/slice)
[INFO] [stderr]    Compiling ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]    Compiling integer v0.1.0 (/opt/rustwide/workdir/integer)
[INFO] [stderr]    Compiling compound v0.1.0 (/opt/rustwide/workdir/compound)
[INFO] [stderr]    Compiling control-flow v0.1.0 (/opt/rustwide/workdir/control-flow)
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir/hello_world)
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir/variables)
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game)
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]   --> match_demo/src/main.rs:55:11
[INFO] [stdout]    |
[INFO] [stdout] 55 |   let mut count = 0;
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]   --> match_demo/src/main.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 |     count += 1;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]  --> match_demo/src/main.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 |   Penny,
[INFO] [stdout]   |   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]  --> match_demo/src/main.rs:9:3
[INFO] [stdout]   |
[INFO] [stdout] 9 |   Nickel,
[INFO] [stdout]   |   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dim`
[INFO] [stdout]   --> match_demo/src/main.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 10 |   Dim,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> integer/src/main.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 |   let a: i8 = 127;
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> integer/src/main.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 |   let a: i8 = -127;
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> integer/src/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 |   let a: u8 = 255;
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> function/src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     y + 5; // 语句
[INFO] [stdout]    |     ^^^^^ the arithmetic operation produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let _ = y + 5; // 语句
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `IpAddrKind1`
[INFO] [stdout]  --> enum_demo/src/main.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum IpAddrKind1 {
[INFO] [stdout]   |      ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]  --> enum_demo/src/main.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 |   V6(String),
[INFO] [stdout]   |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2m 14s
[INFO] running `Command { std: "docker" "inspect" "44249dce55ddd6b60472e815a5b1ba5a6ef2d010ff96b39bc5f54c5c26577a88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44249dce55ddd6b60472e815a5b1ba5a6ef2d010ff96b39bc5f54c5c26577a88", kill_on_drop: false }`
[INFO] [stdout] 44249dce55ddd6b60472e815a5b1ba5a6ef2d010ff96b39bc5f54c5c26577a88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 83ba444ebb42d9c13a660bf23624f94502f4c10088a76d5119036cf77e99d314
[INFO] running `Command { std: "docker" "start" "-a" "83ba444ebb42d9c13a660bf23624f94502f4c10088a76d5119036cf77e99d314", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: variable `count` is assigned to, but never used
[INFO] [stderr]   --> match_demo/src/main.rs:55:11
[INFO] [stderr]    |
[INFO] [stderr] 55 |   let mut count = 0;
[INFO] [stderr]    |           ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_count` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `count` is never read
[INFO] [stderr]   --> match_demo/src/main.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     count += 1;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Penny`
[INFO] [stderr]  --> match_demo/src/main.rs:8:3
[INFO] [stderr]   |
[INFO] [stderr] 8 |   Penny,
[INFO] [stderr]   |   ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nickel`
[INFO] [stderr]  --> match_demo/src/main.rs:9:3
[INFO] [stderr]   |
[INFO] [stderr] 9 |   Nickel,
[INFO] [stderr]   |   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dim`
[INFO] [stderr]   --> match_demo/src/main.rs:10:3
[INFO] [stderr]    |
[INFO] [stderr] 10 |   Dim,
[INFO] [stderr]    |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> function/src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     y + 5; // 语句
[INFO] [stderr]    |     ^^^^^ the arithmetic operation produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let _ = y + 5; // 语句
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> integer/src/main.rs:2:7
[INFO] [stderr]   |
[INFO] [stderr] 2 |   let a: i8 = 127;
[INFO] [stderr]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> integer/src/main.rs:3:7
[INFO] [stderr]   |
[INFO] [stderr] 3 |   let a: i8 = -127;
[INFO] [stderr]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> integer/src/main.rs:4:7
[INFO] [stderr]   |
[INFO] [stderr] 4 |   let a: u8 = 255;
[INFO] [stderr]   |       ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `IpAddrKind1`
[INFO] [stderr]  --> enum_demo/src/main.rs:1:6
[INFO] [stderr]   |
[INFO] [stderr] 1 | enum IpAddrKind1 {
[INFO] [stderr]   |      ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]  --> enum_demo/src/main.rs:8:3
[INFO] [stderr]   |
[INFO] [stderr] 8 |   V6(String),
[INFO] [stderr]   |   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `match_demo` (bin "match_demo" test) generated 5 warnings
[INFO] [stderr] warning: `function` (bin "function" test) generated 1 warning
[INFO] [stderr] warning: `integer` (bin "integer" test) generated 3 warnings
[INFO] [stderr] warning: `enum_demo` (bin "enum_demo" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 9.50s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/compound-34c8ceefddfd868c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/control_flow-3cabf44cc4505bbe)
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[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/enum_demo-c3631dc49522dbf9)
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[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/function-e7b00e4adbd8fbcb)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/guessing_game-5d288558bbf93c3d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hello_world-9cd578c40c709137)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/integer-6378b919268cdbbe)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/match_demo-069fd4805497c7d9)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ownership-569e6f423b6e6da0)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/slice-afa0242c2e9066cb)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/variables-b47fc367a4c51afd)
[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" "83ba444ebb42d9c13a660bf23624f94502f4c10088a76d5119036cf77e99d314", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83ba444ebb42d9c13a660bf23624f94502f4c10088a76d5119036cf77e99d314", kill_on_drop: false }`
[INFO] [stdout] 83ba444ebb42d9c13a660bf23624f94502f4c10088a76d5119036cf77e99d314