[INFO] fetching crate uj_tcs_rust_23_1188 0.1.1...
[INFO] testing uj_tcs_rust_23_1188-0.1.1 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate uj_tcs_rust_23_1188 0.1.1 into /workspace/builds/worker-5-tc2/source
[INFO] removed /workspace/builds/worker-5-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate uj_tcs_rust_23_1188 0.1.1
[INFO] finished tweaking crates.io crate uj_tcs_rust_23_1188 0.1.1
[INFO] tweaked toml for crates.io crate uj_tcs_rust_23_1188 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate uj_tcs_rust_23_1188 0.1.1 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate uj_tcs_rust_23_1188 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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4737aeb5dc06300f0c6a62b4b1fb7102303db91802ff34c061b6491270617aae
[INFO] running `Command { std: "docker" "start" "-a" "4737aeb5dc06300f0c6a62b4b1fb7102303db91802ff34c061b6491270617aae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4737aeb5dc06300f0c6a62b4b1fb7102303db91802ff34c061b6491270617aae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4737aeb5dc06300f0c6a62b4b1fb7102303db91802ff34c061b6491270617aae", kill_on_drop: false }`
[INFO] [stdout] 4737aeb5dc06300f0c6a62b4b1fb7102303db91802ff34c061b6491270617aae
[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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40ce4799dadadc4920c58c4d29c9ffbeb3c44bd5f4b936129e5b5b1e0368ae14
[INFO] running `Command { std: "docker" "start" "-a" "40ce4799dadadc4920c58c4d29c9ffbeb3c44bd5f4b936129e5b5b1e0368ae14", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling predicates-core v1.0.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling anstyle-parse v0.2.3
[INFO] [stderr]    Compiling anstyle-query v1.0.2
[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling regex-automata v0.4.3
[INFO] [stderr]    Compiling anstream v0.6.5
[INFO] [stderr]    Compiling termtree v0.4.1
[INFO] [stderr]    Compiling clap_lex v0.6.0
[INFO] [stderr]    Compiling difflib v0.4.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling clap_builder v4.4.11
[INFO] [stderr]    Compiling syn v2.0.40
[INFO] [stderr]    Compiling predicates-tree v1.0.9
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling uj_tcs_rust_23_18 v0.1.0
[INFO] [stderr]    Compiling bstr v1.8.0
[INFO] [stderr]    Compiling predicates v3.0.4
[INFO] [stderr]    Compiling assert_cmd v2.0.12
[INFO] [stderr]    Compiling clap_derive v4.4.7
[INFO] [stderr]    Compiling clap v4.4.11
[INFO] [stderr]    Compiling uj_tcs_rust_23_1188 v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         head(&PathBuf::from(args.file), args.lines);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let _ = head(&PathBuf::from(args.file), args.lines);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         tail(&PathBuf::from(args.file), args.lines);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let _ = tail(&PathBuf::from(args.file), args.lines);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.80s
[INFO] running `Command { std: "docker" "inspect" "40ce4799dadadc4920c58c4d29c9ffbeb3c44bd5f4b936129e5b5b1e0368ae14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40ce4799dadadc4920c58c4d29c9ffbeb3c44bd5f4b936129e5b5b1e0368ae14", kill_on_drop: false }`
[INFO] [stdout] 40ce4799dadadc4920c58c4d29c9ffbeb3c44bd5f4b936129e5b5b1e0368ae14
[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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df8fa605c432b669b97e597f7556159a7d89b31ef74632f535ea159dbf724fdd
[INFO] running `Command { std: "docker" "start" "-a" "df8fa605c432b669b97e597f7556159a7d89b31ef74632f535ea159dbf724fdd", kill_on_drop: false }`
[INFO] [stderr]    Compiling uj_tcs_rust_23_1188 v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         head(&PathBuf::from(args.file), args.lines);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let _ = head(&PathBuf::from(args.file), args.lines);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         tail(&PathBuf::from(args.file), args.lines);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let _ = tail(&PathBuf::from(args.file), args.lines);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "df8fa605c432b669b97e597f7556159a7d89b31ef74632f535ea159dbf724fdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df8fa605c432b669b97e597f7556159a7d89b31ef74632f535ea159dbf724fdd", kill_on_drop: false }`
[INFO] [stdout] df8fa605c432b669b97e597f7556159a7d89b31ef74632f535ea159dbf724fdd
[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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d2ce9bffbd9bcc5776527a057027bde4b0e062893f01e9c968be76402978ce85
[INFO] running `Command { std: "docker" "start" "-a" "d2ce9bffbd9bcc5776527a057027bde4b0e062893f01e9c968be76402978ce85", kill_on_drop: false }`
[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] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |         head(&PathBuf::from(args.file), args.lines);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let _ = head(&PathBuf::from(args.file), args.lines);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         tail(&PathBuf::from(args.file), args.lines);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 17 |         let _ = tail(&PathBuf::from(args.file), args.lines);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `uj_tcs_rust_23_1188` (bin "head_tail" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/head_tail-5863754c68a44971)
[INFO] running `Command { std: "docker" "inspect" "d2ce9bffbd9bcc5776527a057027bde4b0e062893f01e9c968be76402978ce85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2ce9bffbd9bcc5776527a057027bde4b0e062893f01e9c968be76402978ce85", kill_on_drop: false }`
[INFO] [stdout] d2ce9bffbd9bcc5776527a057027bde4b0e062893f01e9c968be76402978ce85