[INFO] fetching crate rust_stringz 1.0.0...
[INFO] testing rust_stringz-1.0.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate rust_stringz 1.0.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate rust_stringz 1.0.0
[INFO] finished tweaking crates.io crate rust_stringz 1.0.0
[INFO] tweaked toml for crates.io crate rust_stringz 1.0.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_stringz 1.0.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 5499715f1f7370fd803817f291ebce0d375ea1000938434eb13065e2784e5c50
[INFO] running `Command { std: "docker" "start" "-a" "5499715f1f7370fd803817f291ebce0d375ea1000938434eb13065e2784e5c50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5499715f1f7370fd803817f291ebce0d375ea1000938434eb13065e2784e5c50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5499715f1f7370fd803817f291ebce0d375ea1000938434eb13065e2784e5c50", kill_on_drop: false }`
[INFO] [stdout] 5499715f1f7370fd803817f291ebce0d375ea1000938434eb13065e2784e5c50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] ff5d0c761b39610085fe7e9b70e379a1aaa57fa1232146d063ae35535642f689
[INFO] running `Command { std: "docker" "start" "-a" "ff5d0c761b39610085fe7e9b70e379a1aaa57fa1232146d063ae35535642f689", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_stringz v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::count_occurrences`
[INFO] [stdout]   --> src/count_occurrences.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     use super::count_occurrences;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::is_palindrome`
[INFO] [stdout]   --> src/is_palindrome.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     use super::is_palindrome;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::to_lowercase`
[INFO] [stdout]  --> src/to_lowercase.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use super::to_lowercase;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::to_uppercase`
[INFO] [stdout]  --> src/to_uppercase.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use super::to_uppercase;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "ff5d0c761b39610085fe7e9b70e379a1aaa57fa1232146d063ae35535642f689", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff5d0c761b39610085fe7e9b70e379a1aaa57fa1232146d063ae35535642f689", kill_on_drop: false }`
[INFO] [stdout] ff5d0c761b39610085fe7e9b70e379a1aaa57fa1232146d063ae35535642f689
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 50a7b6016dbf41c88bbc6b04d9dcf7790722f65e627ac4af353c3cf1baca8ebb
[INFO] running `Command { std: "docker" "start" "-a" "50a7b6016dbf41c88bbc6b04d9dcf7790722f65e627ac4af353c3cf1baca8ebb", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_stringz v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::count_occurrences`
[INFO] [stdout]   --> src/count_occurrences.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     use super::count_occurrences;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::is_palindrome`
[INFO] [stdout]   --> src/is_palindrome.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     use super::is_palindrome;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::to_lowercase`
[INFO] [stdout]  --> src/to_lowercase.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use super::to_lowercase;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::to_uppercase`
[INFO] [stdout]  --> src/to_uppercase.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     use super::to_uppercase;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "50a7b6016dbf41c88bbc6b04d9dcf7790722f65e627ac4af353c3cf1baca8ebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50a7b6016dbf41c88bbc6b04d9dcf7790722f65e627ac4af353c3cf1baca8ebb", kill_on_drop: false }`
[INFO] [stdout] 50a7b6016dbf41c88bbc6b04d9dcf7790722f65e627ac4af353c3cf1baca8ebb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 127276ad1f19df59182bacb2248cc5e7bb91a0798cbe66fb94b440e0210b5ca3
[INFO] running `Command { std: "docker" "start" "-a" "127276ad1f19df59182bacb2248cc5e7bb91a0798cbe66fb94b440e0210b5ca3", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `super::count_occurrences`
[INFO] [stderr]   --> src/count_occurrences.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     use super::count_occurrences;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::is_palindrome`
[INFO] [stderr]   --> src/is_palindrome.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     use super::is_palindrome;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::to_lowercase`
[INFO] [stderr]  --> src/to_lowercase.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     use super::to_lowercase;
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::to_uppercase`
[INFO] [stderr]  --> src/to_uppercase.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     use super::to_uppercase;
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_stringz` (lib) generated 4 warnings (run `cargo fix --lib -p rust_stringz` to apply 4 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_stringz-d49338eda4475f04)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test count_occurrences::tests::test_single_occurence ... ok
[INFO] [stdout] test count_occurrences::tests::test_zero_occurences ... ok
[INFO] [stdout] test count_occurrences::tests::test_two_occurences ... ok
[INFO] [stdout] test count_occurrences::tests::test_zero_occurences2 ... ok
[INFO] [stdout] test is_palindrome::tests::long_sentence ... ok
[INFO] [stdout] test is_palindrome::tests::test_another_small_string ... ok
[INFO] [stdout] test is_palindrome::tests::test_empty_string ... ok
[INFO] [stdout] test is_palindrome::tests::test_small_string_that_is_not ... ok
[INFO] [stdout] test is_palindrome::tests::test_string_with_punctuation_only ... ok
[INFO] [stdout] test is_palindrome::tests::test_string_with_spaces_and_punctuation ... ok
[INFO] [stdout] test is_palindrome::tests::test_small_string ... ok
[INFO] [stdout] test to_lowercase::tests::test_all_uppercase ... ok
[INFO] [stdout] test is_palindrome::tests::test_string_with_spaces_only ... ok
[INFO] [stdout] test to_uppercase::tests::test_all_lowercase ... ok
[INFO] [stdout] test to_lowercase::tests::test_mixed_case ... ok
[INFO] [stdout] test to_uppercase::tests::test_mixed_case ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_stringz
[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" "127276ad1f19df59182bacb2248cc5e7bb91a0798cbe66fb94b440e0210b5ca3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "127276ad1f19df59182bacb2248cc5e7bb91a0798cbe66fb94b440e0210b5ca3", kill_on_drop: false }`
[INFO] [stdout] 127276ad1f19df59182bacb2248cc5e7bb91a0798cbe66fb94b440e0210b5ca3