[INFO] fetching crate trim_matches_exactly 0.1.0...
[INFO] testing trim_matches_exactly-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate trim_matches_exactly 0.1.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate trim_matches_exactly 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 trim_matches_exactly 0.1.0
[INFO] finished tweaking crates.io crate trim_matches_exactly 0.1.0
[INFO] tweaked toml for crates.io crate trim_matches_exactly 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 795eb5e4a41eabf71973450eb88d7b2c13d4f7837e6e65ddb312a9de763ae686
[INFO] running `Command { std: "docker" "start" "-a" "795eb5e4a41eabf71973450eb88d7b2c13d4f7837e6e65ddb312a9de763ae686", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "795eb5e4a41eabf71973450eb88d7b2c13d4f7837e6e65ddb312a9de763ae686", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "795eb5e4a41eabf71973450eb88d7b2c13d4f7837e6e65ddb312a9de763ae686", kill_on_drop: false }`
[INFO] [stdout] 795eb5e4a41eabf71973450eb88d7b2c13d4f7837e6e65ddb312a9de763ae686
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 18e34ef09c3f2e06ec5c6cba8e6e6948f4edff11a0d6df1ce82d45c427418bb3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "18e34ef09c3f2e06ec5c6cba8e6e6948f4edff11a0d6df1ce82d45c427418bb3", kill_on_drop: false }`
[INFO] [stderr]    Compiling trim_matches_exactly v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::slice_unchecked`: use `get_unchecked(begin..end)` instead
[INFO] [stdout]   --> src/lib.rs:68:21
[INFO] [stdout]    |
[INFO] [stdout] 68 |             Ok(self.slice_unchecked(trim_idx, self.len()))
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::slice_unchecked`: use `get_unchecked(begin..end)` instead
[INFO] [stdout]   --> src/lib.rs:84:21
[INFO] [stdout]    |
[INFO] [stdout] 84 |             Ok(self.slice_unchecked(0, trim_idx))
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(pattern)]
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `trim_matches_exactly` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "18e34ef09c3f2e06ec5c6cba8e6e6948f4edff11a0d6df1ce82d45c427418bb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18e34ef09c3f2e06ec5c6cba8e6e6948f4edff11a0d6df1ce82d45c427418bb3", kill_on_drop: false }`
[INFO] [stdout] 18e34ef09c3f2e06ec5c6cba8e6e6948f4edff11a0d6df1ce82d45c427418bb3