[INFO] fetching crate wbg-rand 0.4.1...
[INFO] testing wbg-rand-0.4.1 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate wbg-rand 0.4.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate wbg-rand 0.4.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wbg-rand 0.4.1
[INFO] finished tweaking crates.io crate wbg-rand 0.4.1
[INFO] tweaked toml for crates.io crate wbg-rand 0.4.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2fb15371f9fd9d7554f0a68a201bca0d4bea527c3c7f26e2ef57a33c258d3d72
[INFO] running `Command { std: "docker" "start" "-a" "2fb15371f9fd9d7554f0a68a201bca0d4bea527c3c7f26e2ef57a33c258d3d72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fb15371f9fd9d7554f0a68a201bca0d4bea527c3c7f26e2ef57a33c258d3d72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fb15371f9fd9d7554f0a68a201bca0d4bea527c3c7f26e2ef57a33c258d3d72", kill_on_drop: false }`
[INFO] [stdout] 2fb15371f9fd9d7554f0a68a201bca0d4bea527c3c7f26e2ef57a33c258d3d72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 581fd6efa64f9cb95ebb7af95560fefbf86fdb5dcd514b7df46c41575b37e218
[INFO] running `Command { std: "docker" "start" "-a" "581fd6efa64f9cb95ebb7af95560fefbf86fdb5dcd514b7df46c41575b37e218", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling wbg-rand v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:28:1
[INFO] [stdout]    |
[INFO] [stdout] 28 | #![feature(use_extern_macros)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `use_extern_macros` has been stable since 1.30.0 and no longer requires an attribute to enable
[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 `wbg-rand` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "581fd6efa64f9cb95ebb7af95560fefbf86fdb5dcd514b7df46c41575b37e218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "581fd6efa64f9cb95ebb7af95560fefbf86fdb5dcd514b7df46c41575b37e218", kill_on_drop: false }`
[INFO] [stdout] 581fd6efa64f9cb95ebb7af95560fefbf86fdb5dcd514b7df46c41575b37e218
