[INFO] fetching crate rusty-forest 0.1.2... [INFO] testing rusty-forest-0.1.2 against beta-2025-09-21 for beta-1.91-3 [INFO] extracting crate rusty-forest 0.1.2 into /workspace/builds/worker-3-tc2/source [INFO] started tweaking crates.io crate rusty-forest 0.1.2 [INFO] finished tweaking crates.io crate rusty-forest 0.1.2 [INFO] tweaked toml for crates.io crate rusty-forest 0.1.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate rusty-forest 0.1.2 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 rusty-forest 0.1.2 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] 0ba0ad64a95481997d460e97d57767ab8ef8cf146487d6164461f3eba816ace5 [INFO] running `Command { std: "docker" "start" "-a" "0ba0ad64a95481997d460e97d57767ab8ef8cf146487d6164461f3eba816ace5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0ba0ad64a95481997d460e97d57767ab8ef8cf146487d6164461f3eba816ace5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0ba0ad64a95481997d460e97d57767ab8ef8cf146487d6164461f3eba816ace5", kill_on_drop: false }` [INFO] [stdout] 0ba0ad64a95481997d460e97d57767ab8ef8cf146487d6164461f3eba816ace5 [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] 2a25f26a89d9a32370ef88310ef4d0ba1ee6e4c6d6c0c0ddcfd1aa9df28834d1 [INFO] running `Command { std: "docker" "start" "-a" "2a25f26a89d9a32370ef88310ef4d0ba1ee6e4c6d6c0c0ddcfd1aa9df28834d1", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.96 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling memchr v2.4.0 [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stderr] Compiling ppv-lite86 v0.2.10 [INFO] [stderr] Compiling unicode-width v0.1.8 [INFO] [stderr] Compiling numtoa v0.1.0 [INFO] [stderr] Compiling regex-syntax v0.6.25 [INFO] [stderr] Compiling itertools v0.10.1 [INFO] [stderr] Compiling getopts v0.2.21 [INFO] [stderr] Compiling getrandom v0.2.3 [INFO] [stderr] Compiling time v0.1.43 [INFO] [stderr] Compiling termion v1.5.6 [INFO] [stderr] Compiling aho-corasick v0.7.18 [INFO] [stderr] Compiling rand_core v0.6.3 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling chrono v0.4.19 [INFO] [stderr] Compiling rand v0.8.4 [INFO] [stderr] Compiling regex v1.5.4 [INFO] [stderr] Compiling rusty-forest v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused return value of `str::::to_lowercase` that must be used [INFO] [stdout] --> src/main.rs:622:13 [INFO] [stdout] | [INFO] [stdout] 622 | t.to_lowercase(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this returns the lowercase string as a new String, without modifying the original [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] 622 | let _ = t.to_lowercase(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `str::::to_lowercase` that must be used [INFO] [stdout] --> src/main.rs:688:13 [INFO] [stdout] | [INFO] [stdout] 688 | x.to_lowercase(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this returns the lowercase string as a new String, without modifying the original [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 688 | let _ = x.to_lowercase(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.48s [INFO] running `Command { std: "docker" "inspect" "2a25f26a89d9a32370ef88310ef4d0ba1ee6e4c6d6c0c0ddcfd1aa9df28834d1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2a25f26a89d9a32370ef88310ef4d0ba1ee6e4c6d6c0c0ddcfd1aa9df28834d1", kill_on_drop: false }` [INFO] [stdout] 2a25f26a89d9a32370ef88310ef4d0ba1ee6e4c6d6c0c0ddcfd1aa9df28834d1 [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] 352766d1c1632594a64e62784634b5603ace2547281532459a4196eb0d289f1b [INFO] running `Command { std: "docker" "start" "-a" "352766d1c1632594a64e62784634b5603ace2547281532459a4196eb0d289f1b", kill_on_drop: false }` [INFO] [stderr] Compiling rusty-forest v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused return value of `str::::to_lowercase` that must be used [INFO] [stdout] --> src/main.rs:622:13 [INFO] [stdout] | [INFO] [stdout] 622 | t.to_lowercase(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this returns the lowercase string as a new String, without modifying the original [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] 622 | let _ = t.to_lowercase(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `str::::to_lowercase` that must be used [INFO] [stdout] --> src/main.rs:688:13 [INFO] [stdout] | [INFO] [stdout] 688 | x.to_lowercase(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this returns the lowercase string as a new String, without modifying the original [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 688 | let _ = x.to_lowercase(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s [INFO] running `Command { std: "docker" "inspect" "352766d1c1632594a64e62784634b5603ace2547281532459a4196eb0d289f1b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "352766d1c1632594a64e62784634b5603ace2547281532459a4196eb0d289f1b", kill_on_drop: false }` [INFO] [stdout] 352766d1c1632594a64e62784634b5603ace2547281532459a4196eb0d289f1b [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] d4d01bb565c0b436a42b86e08809a52c608adf63239d3f7472a7d623ec2aef0b [INFO] running `Command { std: "docker" "start" "-a" "d4d01bb565c0b436a42b86e08809a52c608adf63239d3f7472a7d623ec2aef0b", kill_on_drop: false }` [INFO] [stderr] warning: unused return value of `str::::to_lowercase` that must be used [INFO] [stderr] --> src/main.rs:622:13 [INFO] [stderr] | [INFO] [stderr] 622 | t.to_lowercase(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this returns the lowercase string as a new String, without modifying the original [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] 622 | let _ = t.to_lowercase(); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused return value of `str::::to_lowercase` that must be used [INFO] [stderr] --> src/main.rs:688:13 [INFO] [stderr] | [INFO] [stderr] 688 | x.to_lowercase(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this returns the lowercase string as a new String, without modifying the original [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 688 | let _ = x.to_lowercase(); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: `rusty-forest` (bin "rusty-forest" test) generated 2 warnings [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rusty_forest-76545d9e2337b3b8) [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" "d4d01bb565c0b436a42b86e08809a52c608adf63239d3f7472a7d623ec2aef0b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d4d01bb565c0b436a42b86e08809a52c608adf63239d3f7472a7d623ec2aef0b", kill_on_drop: false }` [INFO] [stdout] d4d01bb565c0b436a42b86e08809a52c608adf63239d3f7472a7d623ec2aef0b