[INFO] fetching crate bzzz 1.0.0...
[INFO] testing bzzz-1.0.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate bzzz 1.0.0 into /workspace/builds/worker-76/source
[INFO] validating manifest of crates.io crate bzzz 1.0.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bzzz 1.0.0
[INFO] finished tweaking crates.io crate bzzz 1.0.0
[INFO] tweaked toml for crates.io crate bzzz 1.0.0 written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] crate crates.io crate bzzz 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74225232d385dba66d1bc1194389060e448f0b97eb4ddb3addeca6316762da5f
[INFO] running `Command { std: "docker" "start" "-a" "74225232d385dba66d1bc1194389060e448f0b97eb4ddb3addeca6316762da5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74225232d385dba66d1bc1194389060e448f0b97eb4ddb3addeca6316762da5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74225232d385dba66d1bc1194389060e448f0b97eb4ddb3addeca6316762da5f", kill_on_drop: false }`
[INFO] [stdout] 74225232d385dba66d1bc1194389060e448f0b97eb4ddb3addeca6316762da5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f8138bb895bfaa3862e9568efcf99c540a3c65e0e5125264df209746978ce4c
[INFO] running `Command { std: "docker" "start" "-a" "2f8138bb895bfaa3862e9568efcf99c540a3c65e0e5125264df209746978ce4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling bzzz v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(array_chunks)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bzzz` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2f8138bb895bfaa3862e9568efcf99c540a3c65e0e5125264df209746978ce4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f8138bb895bfaa3862e9568efcf99c540a3c65e0e5125264df209746978ce4c", kill_on_drop: false }`
[INFO] [stdout] 2f8138bb895bfaa3862e9568efcf99c540a3c65e0e5125264df209746978ce4c