[INFO] fetching crate brioche 0.0.0...
[INFO] testing brioche-0.0.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate brioche 0.0.0 into /workspace/builds/worker-79/source
[INFO] validating manifest of crates.io crate brioche 0.0.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate brioche 0.0.0
[INFO] finished tweaking crates.io crate brioche 0.0.0
[INFO] tweaked toml for crates.io crate brioche 0.0.0 written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate crates.io crate brioche 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustversion v1.0.2
[INFO] [stderr]   Downloaded syn v1.0.15
[INFO] [stderr]   Downloaded proc-macro-error v0.4.9
[INFO] [stderr]   Downloaded brioche-ducc-serde v0.1.2-brioche
[INFO] [stderr]   Downloaded err-derive v0.2.2
[INFO] [stderr]   Downloaded structopt v0.3.9
[INFO] [stderr]   Downloaded proc-macro-error-attr v0.4.9
[INFO] [stderr]   Downloaded structopt-derive v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22a6a504f41736449dab10e372d5d9a6b3dbbbd2135326d420e390e54abf5762
[INFO] running `Command { std: "docker" "start" "-a" "22a6a504f41736449dab10e372d5d9a6b3dbbbd2135326d420e390e54abf5762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22a6a504f41736449dab10e372d5d9a6b3dbbbd2135326d420e390e54abf5762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22a6a504f41736449dab10e372d5d9a6b3dbbbd2135326d420e390e54abf5762", kill_on_drop: false }`
[INFO] [stdout] 22a6a504f41736449dab10e372d5d9a6b3dbbbd2135326d420e390e54abf5762
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 136c261d66ed93f50b748a66b064824b661f798876b997940f8223870241ed3f
[INFO] running `Command { std: "docker" "start" "-a" "136c261d66ed93f50b748a66b064824b661f798876b997940f8223870241ed3f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.15
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling cesu8 v1.1.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling brioche-ducc-sys v0.1.2-brioche
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling brioche-ducc v0.1.2-brioche
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling proc-macro-error v0.4.9
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.9
[INFO] [stderr]    Compiling err-derive v0.2.2
[INFO] [stderr]    Compiling structopt-derive v0.4.2
[INFO] [stderr]    Compiling structopt v0.3.9
[INFO] [stderr]    Compiling brioche-ducc-serde v0.1.2-brioche
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling brioche v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(inner_deref)]
[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 `brioche` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "136c261d66ed93f50b748a66b064824b661f798876b997940f8223870241ed3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "136c261d66ed93f50b748a66b064824b661f798876b997940f8223870241ed3f", kill_on_drop: false }`
[INFO] [stdout] 136c261d66ed93f50b748a66b064824b661f798876b997940f8223870241ed3f