[INFO] fetching crate deferred-reference 0.1.2...
[INFO] testing deferred-reference-0.1.2 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate deferred-reference 0.1.2 into /workspace/builds/worker-90/source
[INFO] validating manifest of crates.io crate deferred-reference 0.1.2 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 deferred-reference 0.1.2
[INFO] finished tweaking crates.io crate deferred-reference 0.1.2
[INFO] tweaked toml for crates.io crate deferred-reference 0.1.2 written to /workspace/builds/worker-90/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-90/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/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] 49102b56de7174d1c5b8730c097068bf813d2427b89ea2a71a68a611257820f1
[INFO] running `Command { std: "docker" "start" "-a" "49102b56de7174d1c5b8730c097068bf813d2427b89ea2a71a68a611257820f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49102b56de7174d1c5b8730c097068bf813d2427b89ea2a71a68a611257820f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49102b56de7174d1c5b8730c097068bf813d2427b89ea2a71a68a611257820f1", kill_on_drop: false }`
[INFO] [stdout] 49102b56de7174d1c5b8730c097068bf813d2427b89ea2a71a68a611257820f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-90/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] ab45f6c144d77da57c334263ea9a48b5afe6238344f6a9adb975639ae3986f8b
[INFO] running `Command { std: "docker" "start" "-a" "ab45f6c144d77da57c334263ea9a48b5afe6238344f6a9adb975639ae3986f8b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling deferred-reference v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:122:40
[INFO] [stdout]     |
[INFO] [stdout] 122 | #![cfg_attr(feature = "slice_ptr_len", feature(slice_ptr_len))]
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:126:41
[INFO] [stdout]     |
[INFO] [stdout] 126 | #![cfg_attr(feature = "coerce_unsized", feature(coerce_unsized))]
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `deferred-reference` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "ab45f6c144d77da57c334263ea9a48b5afe6238344f6a9adb975639ae3986f8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab45f6c144d77da57c334263ea9a48b5afe6238344f6a9adb975639ae3986f8b", kill_on_drop: false }`
[INFO] [stdout] ab45f6c144d77da57c334263ea9a48b5afe6238344f6a9adb975639ae3986f8b
