[INFO] cloning repository https://github.com/lcdr/lu_packets
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lcdr/lu_packets" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flcdr%2Flu_packets", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flcdr%2Flu_packets'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a075f346968c2c4e62966cf07687d403ab5a9f03
[INFO] testing lcdr/lu_packets against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flcdr%2Flu_packets" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lcdr/lu_packets 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] removed /workspace/builds/worker-4/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/lcdr/lu_packets
[INFO] finished tweaking git repo https://github.com/lcdr/lu_packets
[INFO] tweaked toml for git repo https://github.com/lcdr/lu_packets written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/lcdr/lu_packets 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 9d2e855f69504fe1cab174d682d2137e82b24da90600075cbbe7f2c781d4e535
[INFO] running `Command { std: "docker" "start" "-a" "9d2e855f69504fe1cab174d682d2137e82b24da90600075cbbe7f2c781d4e535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d2e855f69504fe1cab174d682d2137e82b24da90600075cbbe7f2c781d4e535", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d2e855f69504fe1cab174d682d2137e82b24da90600075cbbe7f2c781d4e535", kill_on_drop: false }`
[INFO] [stdout] 9d2e855f69504fe1cab174d682d2137e82b24da90600075cbbe7f2c781d4e535
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] feca222d18317a25347be2d55401455e6b2d53bf224e31b2c6562482d6a0fb7c
[INFO] running `Command { std: "docker" "start" "-a" "feca222d18317a25347be2d55401455e6b2d53bf224e31b2c6562482d6a0fb7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling adler v0.2.2
[INFO] [stderr]    Compiling endio_bit v0.1.0 (https://github.com/lcdr/endio_bit?rev=46b1b0eda359dd85b5eabf9714e839c3728c75af#46b1b0ed)
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.0
[INFO] [stderr]    Compiling flate2 v1.0.16
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling endio_derive v0.2.0 (https://github.com/lcdr/endio?rev=6e988eed6d9d3b1fa0edde34062edfb3b01d344a#6e988eed)
[INFO] [stderr]    Compiling lu_packets_derive v0.1.0 (/opt/rustwide/workdir/lu_packets_derive)
[INFO] [stderr]    Compiling endio v0.2.0 (https://github.com/lcdr/endio?rev=6e988eed6d9d3b1fa0edde34062edfb3b01d344a#6e988eed)
[INFO] [stderr]    Compiling lu_packets v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(arbitrary_enum_discriminant)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `arbitrary_enum_discriminant` has been stable since 1.56.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(min_const_generics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `min_const_generics` has been stable since 1.51.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lu_packets` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "feca222d18317a25347be2d55401455e6b2d53bf224e31b2c6562482d6a0fb7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "feca222d18317a25347be2d55401455e6b2d53bf224e31b2c6562482d6a0fb7c", kill_on_drop: false }`
[INFO] [stdout] feca222d18317a25347be2d55401455e6b2d53bf224e31b2c6562482d6a0fb7c