[INFO] fetching crate slashy 0.1.1...
[INFO] documenting slashy-0.1.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate slashy 0.1.1 into /workspace/builds/worker-46/source
[INFO] validating manifest of crates.io crate slashy 0.1.1 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 slashy 0.1.1
[INFO] finished tweaking crates.io crate slashy 0.1.1
[INFO] tweaked toml for crates.io crate slashy 0.1.1 written to /workspace/builds/worker-46/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] 359452c7a3058d27ae2c7657333a4a7ec2b0c5506eee94e01cca988867f2692f
[INFO] running `Command { std: "docker" "start" "-a" "359452c7a3058d27ae2c7657333a4a7ec2b0c5506eee94e01cca988867f2692f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "359452c7a3058d27ae2c7657333a4a7ec2b0c5506eee94e01cca988867f2692f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "359452c7a3058d27ae2c7657333a4a7ec2b0c5506eee94e01cca988867f2692f", kill_on_drop: false }`
[INFO] [stdout] 359452c7a3058d27ae2c7657333a4a7ec2b0c5506eee94e01cca988867f2692f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bb37792a1d8aefe85049e05d32a68c3616948ac4918077b8efc4d531bdecb74
[INFO] running `Command { std: "docker" "start" "-a" "5bb37792a1d8aefe85049e05d32a68c3616948ac4918077b8efc4d531bdecb74", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]     Checking futures-io v0.3.16
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]    Compiling serenity v0.10.8
[INFO] [stderr]     Checking typemap_rev v0.1.5
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking http-body v0.4.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking socket2 v0.4.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]     Checking sha-1 v0.9.7
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking input_buffer v0.3.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking tungstenite v0.11.1
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking webpki v0.21.4
[INFO] [stderr]     Checking sct v0.6.1
[INFO] [stderr]     Checking rustls v0.19.1
[INFO] [stderr]     Checking webpki-roots v0.21.1
[INFO] [stderr]     Checking webpki-roots v0.20.0
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling slashy_macros 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/slashy_macros-0.1.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic)]
[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 `slashy_macros` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5bb37792a1d8aefe85049e05d32a68c3616948ac4918077b8efc4d531bdecb74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bb37792a1d8aefe85049e05d32a68c3616948ac4918077b8efc4d531bdecb74", kill_on_drop: false }`
[INFO] [stdout] 5bb37792a1d8aefe85049e05d32a68c3616948ac4918077b8efc4d531bdecb74
