[INFO] cloning repository https://github.com/FrattiNor/rust-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FrattiNor/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrattiNor%2Frust-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrattiNor%2Frust-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 19f759fa7bf3a1fe7deb959c4d9be545048ab5d6
[INFO] checking FrattiNor/rust-practice against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFrattiNor%2Frust-practice" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FrattiNor/rust-practice on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FrattiNor/rust-practice
[INFO] finished tweaking git repo https://github.com/FrattiNor/rust-practice
[INFO] tweaked toml for git repo https://github.com/FrattiNor/rust-practice written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/FrattiNor/rust-practice 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded textwrap v0.15.0
[INFO] [stderr]   Downloaded crunchy v0.1.6
[INFO] [stderr]   Downloaded proc-macro2 v1.0.37
[INFO] [stderr]   Downloaded bigint v4.4.3
[INFO] [stderr]   Downloaded getrandom v0.2.6
[INFO] [stderr]   Downloaded anyhow v1.0.57
[INFO] [stderr]   Downloaded indexmap v1.8.1
[INFO] [stderr]   Downloaded quote v1.0.18
[INFO] [stderr]   Downloaded os_str_bytes v6.0.0
[INFO] [stderr]   Downloaded clap_lex v0.1.1
[INFO] [stderr]   Downloaded syn v1.0.91
[INFO] [stderr]   Downloaded clap v3.1.12
[INFO] [stderr]   Downloaded libc v0.2.123
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42152ee15378b9e914850452b598a7c8d714bf23543f36dc86ef5b8f0cac476e
[INFO] running `Command { std: "docker" "start" "-a" "42152ee15378b9e914850452b598a7c8d714bf23543f36dc86ef5b8f0cac476e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42152ee15378b9e914850452b598a7c8d714bf23543f36dc86ef5b8f0cac476e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42152ee15378b9e914850452b598a7c8d714bf23543f36dc86ef5b8f0cac476e", kill_on_drop: false }`
[INFO] [stdout] 42152ee15378b9e914850452b598a7c8d714bf23543f36dc86ef5b8f0cac476e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f4a81a4cb0d0ee88166269539d1227047a9355b2fb503e2ebf64cf21370aa43
[INFO] running `Command { std: "docker" "start" "-a" "7f4a81a4cb0d0ee88166269539d1227047a9355b2fb503e2ebf64cf21370aa43", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking clap_lex v0.1.1
[INFO] [stderr]     Checking bigint v4.4.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v3.1.12
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]     Checking rust-practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Man` is never constructed
[INFO] [stdout]  --> src/main.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Man {}
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `A` is never used
[INFO] [stdout]  --> src/main.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait A {}
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `B` is never used
[INFO] [stdout]  --> src/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait B {}
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Man` is never constructed
[INFO] [stdout]  --> src/bin/unit_test_example/main.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Man {}
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `A` is never used
[INFO] [stdout]  --> src/bin/unit_test_example/main.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait A {}
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `B` is never used
[INFO] [stdout]  --> src/bin/unit_test_example/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait B {}
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Man` is never constructed
[INFO] [stdout]  --> src/main.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Man {}
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `A` is never used
[INFO] [stdout]  --> src/main.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait A {}
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `B` is never used
[INFO] [stdout]  --> src/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait B {}
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example1` is never used
[INFO] [stdout]  --> src/bin/mutex/main.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn example1() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/bin/mini_grep/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/bin/mini_grep/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example1` is never used
[INFO] [stdout]  --> src/bin/channel/main.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn example1() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example2` is never used
[INFO] [stdout]   --> src/bin/channel/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn example2() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Man` is never constructed
[INFO] [stdout]  --> src/bin/unit_test_example/main.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Man {}
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `A` is never used
[INFO] [stdout]  --> src/bin/unit_test_example/main.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait A {}
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `B` is never used
[INFO] [stdout]  --> src/bin/unit_test_example/main.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait B {}
[INFO] [stdout]   |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 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] [stdout] warning: function `example1` is never used
[INFO] [stdout]  --> src/bin/mutex/main.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn example1() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example1` is never used
[INFO] [stdout]  --> src/bin/channel/main.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn example1() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example2` is never used
[INFO] [stdout]   --> src/bin/channel/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn example2() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.67s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bigint v4.4.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "7f4a81a4cb0d0ee88166269539d1227047a9355b2fb503e2ebf64cf21370aa43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f4a81a4cb0d0ee88166269539d1227047a9355b2fb503e2ebf64cf21370aa43", kill_on_drop: false }`
[INFO] [stdout] 7f4a81a4cb0d0ee88166269539d1227047a9355b2fb503e2ebf64cf21370aa43