[INFO] fetching crate rem-utils 0.2.1...
[INFO] testing rem-utils-0.2.1 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate rem-utils 0.2.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate rem-utils 0.2.1
[INFO] finished tweaking crates.io crate rem-utils 0.2.1
[INFO] tweaked toml for crates.io crate rem-utils 0.2.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rem-utils 0.2.1 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rem-utils 0.2.1 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pest_generator v2.8.3
[INFO] [stderr]   Downloaded pest_derive v2.8.3
[INFO] [stderr]   Downloaded toml v0.9.8
[INFO] [stderr]   Downloaded serde_spanned v1.0.3
[INFO] [stderr]   Downloaded colored v3.0.0
[INFO] [stderr]   Downloaded config v0.15.18
[INFO] [stderr]   Downloaded pest_meta v2.8.3
[INFO] [stderr]   Downloaded pest v2.8.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93
[INFO] running `Command { std: "docker" "start" "8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling erased-serde v0.4.8
[INFO] [stderr]    Compiling winnow v0.7.13
[INFO] [stderr]    Compiling pest v2.8.3
[INFO] [stderr]    Compiling serde_spanned v1.0.3
[INFO] [stderr]    Compiling toml_datetime v0.7.3
[INFO] [stderr]    Compiling regex-syntax v0.8.8
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling ena v0.14.3
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling colored v3.0.0
[INFO] [stderr]    Compiling home v0.5.12
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling serde-untagged v0.1.9
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling const-random-macro v0.1.16
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling const-random v0.1.18
[INFO] [stderr]    Compiling dlv-list v0.5.2
[INFO] [stderr]    Compiling ordered-multimap v0.7.3
[INFO] [stderr]    Compiling pest_meta v2.8.3
[INFO] [stderr]    Compiling rust-ini v0.21.3
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]    Compiling toml_parser v1.0.4
[INFO] [stderr]    Compiling toml v0.9.8
[INFO] [stderr]    Compiling pest_generator v2.8.3
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling regex v1.12.2
[INFO] [stderr]    Compiling pest_derive v2.8.3
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling json5 v0.4.1
[INFO] [stderr]    Compiling ron v0.8.1
[INFO] [stderr]    Compiling string_cache v0.8.9
[INFO] [stderr]    Compiling config v0.15.18
[INFO] [stderr]    Compiling rem-utils v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rem-utils` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93", kill_on_drop: false }`
[INFO] [stdout] 8e57085b6bd6d7d18078752873bb708cd62e0f6abc436534dc51d44e42ff6e93
