[INFO] fetching crate learning-the-book 0.1.1... [INFO] testing learning-the-book-0.1.1 against beta-2025-09-21 for beta-1.91-3 [INFO] extracting crate learning-the-book 0.1.1 into /workspace/builds/worker-3-tc2/source [INFO] started tweaking crates.io crate learning-the-book 0.1.1 [INFO] finished tweaking crates.io crate learning-the-book 0.1.1 [INFO] tweaked toml for crates.io crate learning-the-book 0.1.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate learning-the-book 0.1.1 on toolchain beta-2025-09-21 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate learning-the-book 0.1.1 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2b580937f732d229bc4d2ec24ab47a5ff1ac71d0d577ad23b12bef999711f138 [INFO] running `Command { std: "docker" "start" "-a" "2b580937f732d229bc4d2ec24ab47a5ff1ac71d0d577ad23b12bef999711f138", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2b580937f732d229bc4d2ec24ab47a5ff1ac71d0d577ad23b12bef999711f138", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2b580937f732d229bc4d2ec24ab47a5ff1ac71d0d577ad23b12bef999711f138", kill_on_drop: false }` [INFO] [stdout] 2b580937f732d229bc4d2ec24ab47a5ff1ac71d0d577ad23b12bef999711f138 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] fca4d82866aed412da274af8f2c14758aea6eff029f8dc4bbb263d11a5e1d4b8 [INFO] running `Command { std: "docker" "start" "-a" "fca4d82866aed412da274af8f2c14758aea6eff029f8dc4bbb263d11a5e1d4b8", kill_on_drop: false }` [INFO] [stderr] Compiling learning-the-book v0.1.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> src/lib.rs:45:13 [INFO] [stdout] | [INFO] [stdout] 45 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> src/lib.rs:45:31 [INFO] [stdout] | [INFO] [stdout] 45 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Counter` is never constructed [INFO] [stdout] --> src/main.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | struct Counter { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/main.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 12 | impl Counter { [INFO] [stdout] | ------------ associated function in this implementation [INFO] [stdout] 13 | fn new() -> Counter { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Shoe` is never constructed [INFO] [stdout] --> src/main.rs:33:8 [INFO] [stdout] | [INFO] [stdout] 33 | struct Shoe { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `shoes_in_size` is never used [INFO] [stdout] --> src/main.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn shoes_in_size(shoes: Vec, shoe_size: u32) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s [INFO] running `Command { std: "docker" "inspect" "fca4d82866aed412da274af8f2c14758aea6eff029f8dc4bbb263d11a5e1d4b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fca4d82866aed412da274af8f2c14758aea6eff029f8dc4bbb263d11a5e1d4b8", kill_on_drop: false }` [INFO] [stdout] fca4d82866aed412da274af8f2c14758aea6eff029f8dc4bbb263d11a5e1d4b8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9a1d0aaa6b50f6a22b4bed3849ddae268c01468bd9d8d52bf6e554c08b319158 [INFO] running `Command { std: "docker" "start" "-a" "9a1d0aaa6b50f6a22b4bed3849ddae268c01468bd9d8d52bf6e554c08b319158", kill_on_drop: false }` [INFO] [stderr] Compiling learning-the-book v0.1.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> src/lib.rs:45:13 [INFO] [stdout] | [INFO] [stdout] 45 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> src/lib.rs:45:31 [INFO] [stdout] | [INFO] [stdout] 45 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> src/lib.rs:45:13 [INFO] [stdout] | [INFO] [stdout] 45 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> src/lib.rs:45:31 [INFO] [stdout] | [INFO] [stdout] 45 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.23s [INFO] running `Command { std: "docker" "inspect" "9a1d0aaa6b50f6a22b4bed3849ddae268c01468bd9d8d52bf6e554c08b319158", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9a1d0aaa6b50f6a22b4bed3849ddae268c01468bd9d8d52bf6e554c08b319158", kill_on_drop: false }` [INFO] [stdout] 9a1d0aaa6b50f6a22b4bed3849ddae268c01468bd9d8d52bf6e554c08b319158 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] c1b6fd85f40acfa6cfac02fab52c96c012c63c6ed9efbe35ea524650194f92ef [INFO] running `Command { std: "docker" "start" "-a" "c1b6fd85f40acfa6cfac02fab52c96c012c63c6ed9efbe35ea524650194f92ef", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `c1` [INFO] [stderr] --> src/lib.rs:45:13 [INFO] [stderr] | [INFO] [stderr] 45 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c2` [INFO] [stderr] --> src/lib.rs:45:31 [INFO] [stderr] | [INFO] [stderr] 45 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stderr] [INFO] [stderr] warning: `learning-the-book` (lib) generated 2 warnings [INFO] [stderr] warning: `learning-the-book` (lib test) generated 2 warnings (2 duplicates) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learning_the_book-e112585f4eed9a3e) [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/learning_the_book-6ffcd930a6190ef0) [INFO] [stdout] [INFO] [stderr] Doc-tests learning_the_book [INFO] [stdout] running 3 tests [INFO] [stdout] test tests::filters_by_size ... ok [INFO] [stdout] test tests::calling_next_directly ... ok [INFO] [stdout] test tests::using_other_iterator_trait_methods ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test src/lib.rs - add_one (line 10) ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/lib.rs - add_one (line 10) stdout ---- [INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `playground` [INFO] [stdout] --> src/lib.rs:12:14 [INFO] [stdout] | [INFO] [stdout] 4 | let answer = playground::add_one(arg); [INFO] [stdout] | ^^^^^^^^^^ use of unresolved module or unlinked crate `playground` [INFO] [stdout] | [INFO] [stdout] = help: if you wanted to use a crate named `playground`, use `cargo add playground` to add it to your `Cargo.toml` [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0433`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/lib.rs - add_one (line 10) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s [INFO] [stdout] [INFO] [stderr] error: doctest failed, to rerun pass `--doc` [INFO] running `Command { std: "docker" "inspect" "c1b6fd85f40acfa6cfac02fab52c96c012c63c6ed9efbe35ea524650194f92ef", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c1b6fd85f40acfa6cfac02fab52c96c012c63c6ed9efbe35ea524650194f92ef", kill_on_drop: false }` [INFO] [stdout] c1b6fd85f40acfa6cfac02fab52c96c012c63c6ed9efbe35ea524650194f92ef