[INFO] fetching crate arithmetic-coding 0.2.0...
[INFO] documenting arithmetic-coding-0.2.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate arithmetic-coding 0.2.0 into /workspace/builds/worker-57/source
[INFO] validating manifest of crates.io crate arithmetic-coding 0.2.0 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arithmetic-coding 0.2.0
[INFO] finished tweaking crates.io crate arithmetic-coding 0.2.0
[INFO] tweaked toml for crates.io crate arithmetic-coding 0.2.0 written to /workspace/builds/worker-57/source/Cargo.toml
[INFO] crate crates.io crate arithmetic-coding 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82ce9a67a6b0e376ad5e141235c182b5eabb7a25958860b9592b4a4777f02895
[INFO] running `Command { std: "docker" "start" "-a" "82ce9a67a6b0e376ad5e141235c182b5eabb7a25958860b9592b4a4777f02895", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82ce9a67a6b0e376ad5e141235c182b5eabb7a25958860b9592b4a4777f02895", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82ce9a67a6b0e376ad5e141235c182b5eabb7a25958860b9592b4a4777f02895", kill_on_drop: false }`
[INFO] [stdout] 82ce9a67a6b0e376ad5e141235c182b5eabb7a25958860b9592b4a4777f02895
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "RUSTDOCFLAGS=--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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 243db89389d2cfeddfadfee339bbd81bcbcefea1f57fe937834063ddb9968e58
[INFO] running `Command { std: "docker" "start" "-a" "243db89389d2cfeddfadfee339bbd81bcbcefea1f57fe937834063ddb9968e58", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]     Checking bitstream-io v1.2.0
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking arithmetic-coding-core v0.1.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/arithmetic-coding-core-0.1.0/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(int_log)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/arithmetic-coding-core-0.1.0/src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(associated_type_defaults)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/arithmetic-coding-core-0.1.0/src/lib.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(int_log)]
[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 `arithmetic-coding-core` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "243db89389d2cfeddfadfee339bbd81bcbcefea1f57fe937834063ddb9968e58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "243db89389d2cfeddfadfee339bbd81bcbcefea1f57fe937834063ddb9968e58", kill_on_drop: false }`
[INFO] [stdout] 243db89389d2cfeddfadfee339bbd81bcbcefea1f57fe937834063ddb9968e58