[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 master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolunzh%2Frust-demo" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'... [INFO] [stderr] done. [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-6-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/polunzh/rust-demo on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/polunzh/rust-demo 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f502dc7e7ef94f4a9ed4dbbbd49b2848905060177eea9de5faf77b0a3abe9df8 [INFO] running `Command { std: "docker" "start" "-a" "f502dc7e7ef94f4a9ed4dbbbd49b2848905060177eea9de5faf77b0a3abe9df8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f502dc7e7ef94f4a9ed4dbbbd49b2848905060177eea9de5faf77b0a3abe9df8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f502dc7e7ef94f4a9ed4dbbbd49b2848905060177eea9de5faf77b0a3abe9df8", kill_on_drop: false }` [INFO] [stdout] f502dc7e7ef94f4a9ed4dbbbd49b2848905060177eea9de5faf77b0a3abe9df8 [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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ddb6b61d90d50ea534bc3eb04e9a19a90960618c8c508d6d44d4d6c0452377cb [INFO] running `Command { std: "docker" "start" "-a" "ddb6b61d90d50ea534bc3eb04e9a19a90960618c8c508d6d44d4d6c0452377cb", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.58 [INFO] [stderr] Compiling function v0.1.0 (/opt/rustwide/workdir/function) [INFO] [stderr] Compiling control-flow v0.1.0 (/opt/rustwide/workdir/control-flow) [INFO] [stderr] Compiling slice v0.1.0 (/opt/rustwide/workdir/slice) [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 variables v0.1.0 (/opt/rustwide/workdir/variables) [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)]` (part of `#[warn(unused)]`) 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] [stderr] Compiling integer v0.1.0 (/opt/rustwide/workdir/integer) [INFO] [stderr] Compiling compound v0.1.0 (/opt/rustwide/workdir/compound) [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] [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)]` (part of `#[warn(unused)]`) 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] [stderr] Compiling enum_demo v0.1.0 (/opt/rustwide/workdir/enum_demo) [INFO] [stderr] Compiling hello_world v0.1.0 (/opt/rustwide/workdir/hello_world) [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: consider using `_count` instead [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [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] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dim` are never constructed [INFO] [stdout] --> match_demo/src/main.rs:8:3 [INFO] [stdout] | [INFO] [stdout] 7 | enum Coin { [INFO] [stdout] | ---- variants in this enum [INFO] [stdout] 8 | Penny, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 9 | Nickel, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] 10 | Dim, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddrKind1` is never used [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)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read [INFO] [stdout] --> enum_demo/src/main.rs:7:6 [INFO] [stdout] | [INFO] [stdout] 7 | V4(u8, u8, u8, u8), [INFO] [stdout] | -- ^^ ^^ ^^ ^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields [INFO] [stdout] | [INFO] [stdout] 7 - V4(u8, u8, u8, u8), [INFO] [stdout] 7 + V4((), (), (), ()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `V6` is never constructed [INFO] [stdout] --> enum_demo/src/main.rs:8:3 [INFO] [stdout] | [INFO] [stdout] 6 | enum IpAddrKind2 { [INFO] [stdout] | ----------- variant in this enum [INFO] [stdout] 7 | V4(u8, u8, u8, u8), [INFO] [stdout] 8 | V6(String), [INFO] [stdout] | ^^ [INFO] [stdout] [INFO] [stdout] [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` profile [unoptimized + debuginfo] target(s) in 3.33s [INFO] running `Command { std: "docker" "inspect" "ddb6b61d90d50ea534bc3eb04e9a19a90960618c8c508d6d44d4d6c0452377cb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ddb6b61d90d50ea534bc3eb04e9a19a90960618c8c508d6d44d4d6c0452377cb", kill_on_drop: false }` [INFO] [stdout] ddb6b61d90d50ea534bc3eb04e9a19a90960618c8c508d6d44d4d6c0452377cb [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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 717ea8260dd7ef823741ccddc28d54a6a7d37abd04a61d2b79ca2743a7b18e66 [INFO] running `Command { std: "docker" "start" "-a" "717ea8260dd7ef823741ccddc28d54a6a7d37abd04a61d2b79ca2743a7b18e66", kill_on_drop: false }` [INFO] [stderr] Compiling guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game) [INFO] [stderr] Compiling enum_demo v0.1.0 (/opt/rustwide/workdir/enum_demo) [INFO] [stderr] Compiling hello_world v0.1.0 (/opt/rustwide/workdir/hello_world) [INFO] [stderr] Compiling integer v0.1.0 (/opt/rustwide/workdir/integer) [INFO] [stderr] Compiling match_demo v0.1.0 (/opt/rustwide/workdir/match_demo) [INFO] [stderr] Compiling slice v0.1.0 (/opt/rustwide/workdir/slice) [INFO] [stderr] Compiling control-flow v0.1.0 (/opt/rustwide/workdir/control-flow) [INFO] [stderr] Compiling ownership v0.1.0 (/opt/rustwide/workdir/ownership) [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)]` (part of `#[warn(unused)]`) 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: enum `IpAddrKind1` is never used [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)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read [INFO] [stdout] --> enum_demo/src/main.rs:7:6 [INFO] [stdout] | [INFO] [stdout] 7 | V4(u8, u8, u8, u8), [INFO] [stdout] | -- ^^ ^^ ^^ ^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this variant [INFO] [stdout] | [INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields [INFO] [stdout] | [INFO] [stdout] 7 - V4(u8, u8, u8, u8), [INFO] [stdout] 7 + V4((), (), (), ()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `V6` is never constructed [INFO] [stdout] --> enum_demo/src/main.rs:8:3 [INFO] [stdout] | [INFO] [stdout] 6 | enum IpAddrKind2 { [INFO] [stdout] | ----------- variant in this enum [INFO] [stdout] 7 | V4(u8, u8, u8, u8), [INFO] [stdout] 8 | V6(String), [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: consider using `_count` instead [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [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] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dim` are never constructed [INFO] [stdout] --> match_demo/src/main.rs:8:3 [INFO] [stdout] | [INFO] [stdout] 7 | enum Coin { [INFO] [stdout] | ---- variants in this enum [INFO] [stdout] 8 | Penny, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 9 | Nickel, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] 10 | Dim, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling compound v0.1.0 (/opt/rustwide/workdir/compound) [INFO] [stderr] Compiling function v0.1.0 (/opt/rustwide/workdir/function) [INFO] [stderr] Compiling variables v0.1.0 (/opt/rustwide/workdir/variables) [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)]` (part of `#[warn(unused)]`) 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] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 1.13s [INFO] running `Command { std: "docker" "inspect" "717ea8260dd7ef823741ccddc28d54a6a7d37abd04a61d2b79ca2743a7b18e66", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "717ea8260dd7ef823741ccddc28d54a6a7d37abd04a61d2b79ca2743a7b18e66", kill_on_drop: false }` [INFO] [stdout] 717ea8260dd7ef823741ccddc28d54a6a7d37abd04a61d2b79ca2743a7b18e66 [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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 31f00df96443c8bf782c5afabb856c5ad56de2551e5f8351b7ff05947c0637ae [INFO] running `Command { std: "docker" "start" "-a" "31f00df96443c8bf782c5afabb856c5ad56de2551e5f8351b7ff05947c0637ae", kill_on_drop: false }` [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)]` (part of `#[warn(unused)]`) 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: `function` (bin "function" test) generated 1 warning [INFO] [stderr] warning: enum `IpAddrKind1` is never used [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)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: fields `0`, `1`, `2`, and `3` are never read [INFO] [stderr] --> enum_demo/src/main.rs:7:6 [INFO] [stderr] | [INFO] [stderr] 7 | V4(u8, u8, u8, u8), [INFO] [stderr] | -- ^^ ^^ ^^ ^^ [INFO] [stderr] | | [INFO] [stderr] | fields in this variant [INFO] [stderr] | [INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields [INFO] [stderr] | [INFO] [stderr] 7 - V4(u8, u8, u8, u8), [INFO] [stderr] 7 + V4((), (), (), ()), [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: variant `V6` is never constructed [INFO] [stderr] --> enum_demo/src/main.rs:8:3 [INFO] [stderr] | [INFO] [stderr] 6 | enum IpAddrKind2 { [INFO] [stderr] | ----------- variant in this enum [INFO] [stderr] 7 | V4(u8, u8, u8, u8), [INFO] [stderr] 8 | V6(String), [INFO] [stderr] | ^^ [INFO] [stderr] [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: consider using `_count` instead [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [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] = help: maybe it is overwritten before being read? [INFO] [stderr] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: variants `Penny`, `Nickel`, and `Dim` are never constructed [INFO] [stderr] --> match_demo/src/main.rs:8:3 [INFO] [stderr] | [INFO] [stderr] 7 | enum Coin { [INFO] [stderr] | ---- variants in this enum [INFO] [stderr] 8 | Penny, [INFO] [stderr] | ^^^^^ [INFO] [stderr] 9 | Nickel, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] 10 | Dim, [INFO] [stderr] | ^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: `enum_demo` (bin "enum_demo" test) generated 3 warnings [INFO] [stderr] warning: `match_demo` (bin "match_demo" test) generated 3 warnings [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)]` (part of `#[warn(unused)]`) 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: `integer` (bin "integer" test) generated 3 warnings [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/compound-02333d0064630983) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/control_flow-ab846140f2ccb053) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/enum_demo-cbd8fb144a5550bd) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/function-80c396b0fbae76f6) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/guessing_game-55ded16a33492180) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hello_world-e73e740ce3276d7e) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/integer-33900cc2f3f9cdb2) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/match_demo-6d1198380f389d78) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/ownership-27b5179a85f0be7c) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/slice-8d4e12396fe6958f) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/variables-3fef3db1da60d89f) [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" "31f00df96443c8bf782c5afabb856c5ad56de2551e5f8351b7ff05947c0637ae", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "31f00df96443c8bf782c5afabb856c5ad56de2551e5f8351b7ff05947c0637ae", kill_on_drop: false }` [INFO] [stdout] 31f00df96443c8bf782c5afabb856c5ad56de2551e5f8351b7ff05947c0637ae