[INFO] updating cached repository https://github.com/t3m8ch/word-reverser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 40d61e38d759f435c8f06c460ed325d5bf1a37dd
[INFO] testing t3m8ch/word-reverser against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft3m8ch%2Fword-reverser" "/workspace/builds/worker-118/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-118/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/t3m8ch/word-reverser on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/t3m8ch/word-reverser
[INFO] finished tweaking git repo https://github.com/t3m8ch/word-reverser
[INFO] tweaked toml for git repo https://github.com/t3m8ch/word-reverser written to /workspace/builds/worker-118/source/Cargo.toml
[INFO] crate git repo https://github.com/t3m8ch/word-reverser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9283b9ae2cc45d47e5db3197e819597a71511e0a78d9b95f5d74cc7d7eb69742
[INFO] running `Command { std: "docker" "start" "-a" "9283b9ae2cc45d47e5db3197e819597a71511e0a78d9b95f5d74cc7d7eb69742", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9283b9ae2cc45d47e5db3197e819597a71511e0a78d9b95f5d74cc7d7eb69742", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9283b9ae2cc45d47e5db3197e819597a71511e0a78d9b95f5d74cc7d7eb69742", kill_on_drop: false }`
[INFO] [stdout] 9283b9ae2cc45d47e5db3197e819597a71511e0a78d9b95f5d74cc7d7eb69742
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29badce90b7fbf29704b79cab185220805eca56d650dd52b5d3b0123216944de
[INFO] running `Command { std: "docker" "start" "-a" "29badce90b7fbf29704b79cab185220805eca56d650dd52b5d3b0123216944de", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling word-reverser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 | /             &chars[previous_i..i].iter()
[INFO] [stdout] 65 | |                 .for_each(|l| item.push(l.clone()));
[INFO] [stdout]    | |___________________________________________________^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let _ = &chars[previous_i..i].iter()
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.92s
[INFO] running `Command { std: "docker" "inspect" "29badce90b7fbf29704b79cab185220805eca56d650dd52b5d3b0123216944de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29badce90b7fbf29704b79cab185220805eca56d650dd52b5d3b0123216944de", kill_on_drop: false }`
[INFO] [stdout] 29badce90b7fbf29704b79cab185220805eca56d650dd52b5d3b0123216944de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dbd7773f6879dc658b34864c409918b76888e32134aa6439d053138b82fdc2ba
[INFO] running `Command { std: "docker" "start" "-a" "dbd7773f6879dc658b34864c409918b76888e32134aa6439d053138b82fdc2ba", kill_on_drop: false }`
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 | /             &chars[previous_i..i].iter()
[INFO] [stdout] 65 | |                 .for_each(|l| item.push(l.clone()));
[INFO] [stdout]    | |___________________________________________________^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let _ = &chars[previous_i..i].iter()
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling word-reverser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 | /             &chars[previous_i..i].iter()
[INFO] [stdout] 65 | |                 .for_each(|l| item.push(l.clone()));
[INFO] [stdout]    | |___________________________________________________^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 64 |             let _ = &chars[previous_i..i].iter()
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "dbd7773f6879dc658b34864c409918b76888e32134aa6439d053138b82fdc2ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbd7773f6879dc658b34864c409918b76888e32134aa6439d053138b82fdc2ba", kill_on_drop: false }`
[INFO] [stdout] dbd7773f6879dc658b34864c409918b76888e32134aa6439d053138b82fdc2ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 61a8b9582d93a18d7bc11e26bbac93c512d5bf4b90571fe4bf770a9a9769f580
[INFO] running `Command { std: "docker" "start" "-a" "61a8b9582d93a18d7bc11e26bbac93c512d5bf4b90571fe4bf770a9a9769f580", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]   --> src/lib.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 | /             &chars[previous_i..i].iter()
[INFO] [stderr] 65 | |                 .for_each(|l| item.push(l.clone()));
[INFO] [stderr]    | |___________________________________________________^ the borrow produces a value
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 64 |             let _ = &chars[previous_i..i].iter()
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `word-reverser` (lib) generated 1 warning
[INFO] [stderr] warning: `word-reverser` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.78s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/word_reverser-a6016e280140af74)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::flip_text_words_multiline_text ... ok
[INFO] [stdout] test tests::flip_text_words_simple_text ... ok
[INFO] [stdout] test tests::flip_text_words_unicode_text ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/word_reverser-992bd37f243e57f5)
[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 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]    Doc-tests word-reverser
[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" "61a8b9582d93a18d7bc11e26bbac93c512d5bf4b90571fe4bf770a9a9769f580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61a8b9582d93a18d7bc11e26bbac93c512d5bf4b90571fe4bf770a9a9769f580", kill_on_drop: false }`
[INFO] [stdout] 61a8b9582d93a18d7bc11e26bbac93c512d5bf4b90571fe4bf770a9a9769f580