[INFO] cloning repository https://github.com/ddprrt/refactoring-rust-workshop-examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ddprrt/refactoring-rust-workshop-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Frefactoring-rust-workshop-examples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Frefactoring-rust-workshop-examples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d58f61217707438d167cf6ed1cd8509c29dc6eb
[INFO] checking ddprrt/refactoring-rust-workshop-examples against master#5337252b9952fdd9482ed6a4add17254e5bd2c40 for pr-138785
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Frefactoring-rust-workshop-examples" "/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/ddprrt/refactoring-rust-workshop-examples on toolchain 5337252b9952fdd9482ed6a4add17254e5bd2c40
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5337252b9952fdd9482ed6a4add17254e5bd2c40" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ddprrt/refactoring-rust-workshop-examples
[INFO] finished tweaking git repo https://github.com/ddprrt/refactoring-rust-workshop-examples
[INFO] tweaked toml for git repo https://github.com/ddprrt/refactoring-rust-workshop-examples written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ddprrt/refactoring-rust-workshop-examples 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" "+5337252b9952fdd9482ed6a4add17254e5bd2c40" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[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-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+5337252b9952fdd9482ed6a4add17254e5bd2c40" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 800c2f92314da1d0af2e6dd1a551e64a1de1d9bb3227b8dcded5fad98f2dbe5b
[INFO] running `Command { std: "docker" "start" "-a" "800c2f92314da1d0af2e6dd1a551e64a1de1d9bb3227b8dcded5fad98f2dbe5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "800c2f92314da1d0af2e6dd1a551e64a1de1d9bb3227b8dcded5fad98f2dbe5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "800c2f92314da1d0af2e6dd1a551e64a1de1d9bb3227b8dcded5fad98f2dbe5b", kill_on_drop: false }`
[INFO] [stdout] 800c2f92314da1d0af2e6dd1a551e64a1de1d9bb3227b8dcded5fad98f2dbe5b
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+5337252b9952fdd9482ed6a4add17254e5bd2c40" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9b910aa9d5703a625bf4ca148c8d95243fa3cf5ca34c7b00e39b5bb087477fe
[INFO] running `Command { std: "docker" "start" "-a" "f9b910aa9d5703a625bf4ca148c8d95243fa3cf5ca34c7b00e39b5bb087477fe", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Checking clippy v0.1.0 (/opt/rustwide/workdir/clippy)
[INFO] [stderr]     Checking default-trait v0.1.0 (/opt/rustwide/workdir/default-trait)
[INFO] [stderr]     Checking iterator-ex v0.1.0 (/opt/rustwide/workdir/iterator-ex)
[INFO] [stderr]     Checking progress v0.1.0 (/opt/rustwide/workdir/progress)
[INFO] [stderr]     Checking fibonacci v0.1.0 (/opt/rustwide/workdir/fibonacci)
[INFO] [stderr]     Checking errors v0.1.0 (/opt/rustwide/workdir/errors)
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let clock = Clock::default();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let clock: Clock = Default::default();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> iterator-ex/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let slice = vec.as_slice();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let clock = Clock {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let clock = Clock {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_arr`
[INFO] [stdout]   --> iterator-ex/src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let slice_arr = arr.as_slice();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let clock: Clock = X::x();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> iterator-ex/src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let x = "abc".to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> default-trait/src/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let z: Option<Clock> = Clock::default().into();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> iterator-ex/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let a = A::new("Hello");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let clock = anything::<Clock>();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> iterator-ex/src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let b = A::new(String::from("Yolo"));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> iterator-ex/src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let slice = strng_2.as_str(); // Same data
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> iterator-ex/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct A {
[INFO] [stdout]   |        - field in this struct
[INFO] [stdout] 2 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `hours` and `minutes` are never read
[INFO] [stdout]  --> default-trait/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Clock {
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 3 |     hours: usize,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     minutes: usize,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Clock` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]   --> default-trait/src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum MyOption<T> {
[INFO] [stdout]    |      -------- variant in this enum
[INFO] [stdout] 22 |     Some(T),
[INFO] [stdout] 23 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> iterator-ex/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let slice = vec.as_slice();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_arr`
[INFO] [stdout]   --> iterator-ex/src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let slice_arr = arr.as_slice();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> iterator-ex/src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let x = "abc".to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> iterator-ex/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let a = A::new("Hello");
[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]   --> iterator-ex/src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let b = A::new(String::from("Yolo"));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> iterator-ex/src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let slice = strng_2.as_str(); // Same data
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> iterator-ex/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct A {
[INFO] [stdout]   |        - field in this struct
[INFO] [stdout] 2 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let clock = Clock::default();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let clock: Clock = Default::default();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let clock = Clock {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let clock = Clock {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let clock: Clock = X::x();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> default-trait/src/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let z: Option<Clock> = Clock::default().into();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `clock`
[INFO] [stdout]   --> default-trait/src/main.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let clock = anything::<Clock>();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_clock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `hours` and `minutes` are never read
[INFO] [stdout]  --> default-trait/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Clock {
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 3 |     hours: usize,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     minutes: usize,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Clock` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]   --> default-trait/src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum MyOption<T> {
[INFO] [stdout]    |      -------- variant in this enum
[INFO] [stdout] 22 |     Some(T),
[INFO] [stdout] 23 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "f9b910aa9d5703a625bf4ca148c8d95243fa3cf5ca34c7b00e39b5bb087477fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9b910aa9d5703a625bf4ca148c8d95243fa3cf5ca34c7b00e39b5bb087477fe", kill_on_drop: false }`
[INFO] [stdout] f9b910aa9d5703a625bf4ca148c8d95243fa3cf5ca34c7b00e39b5bb087477fe