[INFO] fetching crate intercom-attributes 0.3.0...
[INFO] documenting intercom-attributes-0.3.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate intercom-attributes 0.3.0 into /workspace/builds/worker-51/source
[INFO] validating manifest of crates.io crate intercom-attributes 0.3.0 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 intercom-attributes 0.3.0
[INFO] finished tweaking crates.io crate intercom-attributes 0.3.0
[INFO] tweaked toml for crates.io crate intercom-attributes 0.3.0 written to /workspace/builds/worker-51/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded intercom-common v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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] 5fa60f498966688ca8de4a59bb530e0c85a3b459b453d4578aa4040d6d65dcf1
[INFO] running `Command { std: "docker" "start" "-a" "5fa60f498966688ca8de4a59bb530e0c85a3b459b453d4578aa4040d6d65dcf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fa60f498966688ca8de4a59bb530e0c85a3b459b453d4578aa4040d6d65dcf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fa60f498966688ca8de4a59bb530e0c85a3b459b453d4578aa4040d6d65dcf1", kill_on_drop: false }`
[INFO] [stdout] 5fa60f498966688ca8de4a59bb530e0c85a3b459b453d4578aa4040d6d65dcf1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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] 2387372fdbe99d6498d82fcceeaf7b083b2cdf16b2e0e378a32e30a5ac629b30
[INFO] running `Command { std: "docker" "start" "-a" "2387372fdbe99d6498d82fcceeaf7b083b2cdf16b2e0e378a32e30a5ac629b30", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking rustc-demangle v0.1.20
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking ordermap v0.3.5
[INFO] [stderr]     Checking sha1 v0.3.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking object v0.26.0
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking handlebars v0.29.1
[INFO] [stderr]     Checking intercom-common v0.3.0
[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/intercom-common-0.3.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(non_exhaustive)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `non_exhaustive` has been stable since 1.40.0 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 `intercom-common` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2387372fdbe99d6498d82fcceeaf7b083b2cdf16b2e0e378a32e30a5ac629b30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2387372fdbe99d6498d82fcceeaf7b083b2cdf16b2e0e378a32e30a5ac629b30", kill_on_drop: false }`
[INFO] [stdout] 2387372fdbe99d6498d82fcceeaf7b083b2cdf16b2e0e378a32e30a5ac629b30
