[INFO] fetching crate luk 0.1.0...
[INFO] testing luk-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate luk 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate luk 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate luk 0.1.0
[INFO] finished tweaking crates.io crate luk 0.1.0
[INFO] tweaked toml for crates.io crate luk 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate luk 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ansi_colours v1.0.4
[INFO] [stderr]   Downloaded pkg-config v0.3.23
[INFO] [stderr]   Downloaded shell-words v0.1.0
[INFO] [stderr]   Downloaded console v0.10.3
[INFO] [stderr]   Downloaded content_inspector v0.2.4
[INFO] [stderr]   Downloaded prettyprint v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92d52f78405ba9dbbf16728e97b0484a04e9f620c05a3fd6d330d240a5169f0e
[INFO] running `Command { std: "docker" "start" "-a" "92d52f78405ba9dbbf16728e97b0484a04e9f620c05a3fd6d330d240a5169f0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92d52f78405ba9dbbf16728e97b0484a04e9f620c05a3fd6d330d240a5169f0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92d52f78405ba9dbbf16728e97b0484a04e9f620c05a3fd6d330d240a5169f0e", kill_on_drop: false }`
[INFO] [stdout] 92d52f78405ba9dbbf16728e97b0484a04e9f620c05a3fd6d330d240a5169f0e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e228383abf0c58f4caab16ea5e3a7a0ee32d7d1109a0389407280bbd79048d73
[INFO] running `Command { std: "docker" "start" "-a" "e228383abf0c58f4caab16ea5e3a7a0ee32d7d1109a0389407280bbd79048d73", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.109
[INFO] [stderr]    Compiling proc-macro2 v1.0.33
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling serde v1.0.131
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling pkg-config v0.3.23
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling ryu v1.0.6
[INFO] [stderr]    Compiling crc32fast v1.3.0
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]    Compiling serde_derive v1.0.131
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling xml-rs v0.8.4
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling shell-words v0.1.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling content_inspector v0.2.4
[INFO] [stderr]    Compiling encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-korean v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-japanese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]    Compiling line-wrap v0.1.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling encoding v0.2.33
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling onig_sys v69.7.1
[INFO] [stderr]    Compiling backtrace v0.3.63
[INFO] [stderr]    Compiling ansi_colours v1.0.4
[INFO] [stderr]    Compiling time v0.3.5
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling clicolors-control v1.0.1
[INFO] [stderr]    Compiling termios v0.3.3
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling flate2 v1.0.22
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling directories v2.0.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling console v0.10.3
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling plist v1.3.1
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling onig v6.3.1
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling structopt v0.3.25
[INFO] [stderr]    Compiling syntect v4.6.0
[INFO] [stderr]    Compiling derive_builder_core v0.9.0
[INFO] [stderr]    Compiling prettyprint v0.8.1
[INFO] [stderr]    Compiling luk v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.33s
[INFO] running `Command { std: "docker" "inspect" "e228383abf0c58f4caab16ea5e3a7a0ee32d7d1109a0389407280bbd79048d73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e228383abf0c58f4caab16ea5e3a7a0ee32d7d1109a0389407280bbd79048d73", kill_on_drop: false }`
[INFO] [stdout] e228383abf0c58f4caab16ea5e3a7a0ee32d7d1109a0389407280bbd79048d73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a58d76473810bb7a1c922317b5ea55fa2e87ed9b6b4036fb229b36fbcd93ef8
[INFO] running `Command { std: "docker" "start" "-a" "2a58d76473810bb7a1c922317b5ea55fa2e87ed9b6b4036fb229b36fbcd93ef8", 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] [stderr]    Compiling luk v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:54:58
[INFO] [stdout]    |
[INFO] [stdout] 54 |     find_matches("lorem ipsum\ndolor sit amet", "lorem", &mut result);
[INFO] [stdout]    |                                                          ^^^^^^^^^^^ expected `str`, found struct `Vec`
[INFO] [stdout]    |
[INFO] [stdout]    = note:      expected reference `&str`
[INFO] [stdout]            found mutable reference `&mut Vec<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `luk` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2a58d76473810bb7a1c922317b5ea55fa2e87ed9b6b4036fb229b36fbcd93ef8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a58d76473810bb7a1c922317b5ea55fa2e87ed9b6b4036fb229b36fbcd93ef8", kill_on_drop: false }`
[INFO] [stdout] 2a58d76473810bb7a1c922317b5ea55fa2e87ed9b6b4036fb229b36fbcd93ef8