[INFO] fetching crate unmp-link-udp 0.7.0...
[INFO] documenting unmp-link-udp-0.7.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate unmp-link-udp 0.7.0 into /workspace/builds/worker-84/source
[INFO] validating manifest of crates.io crate unmp-link-udp 0.7.0 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 unmp-link-udp 0.7.0
[INFO] finished tweaking crates.io crate unmp-link-udp 0.7.0
[INFO] tweaked toml for crates.io crate unmp-link-udp 0.7.0 written to /workspace/builds/worker-84/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]  Downloading crates ...
[INFO] [stderr]   Downloaded eds v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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] 497f79c111644f492676e1f4583a53157de29dcd7953c118cae9434fd649e12d
[INFO] running `Command { std: "docker" "start" "-a" "497f79c111644f492676e1f4583a53157de29dcd7953c118cae9434fd649e12d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "497f79c111644f492676e1f4583a53157de29dcd7953c118cae9434fd649e12d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "497f79c111644f492676e1f4583a53157de29dcd7953c118cae9434fd649e12d", kill_on_drop: false }`
[INFO] [stdout] 497f79c111644f492676e1f4583a53157de29dcd7953c118cae9434fd649e12d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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] a920a865090d62fd98ab1846231c186a75bcc56dc35181d50a5c4e533fd7aff4
[INFO] running `Command { std: "docker" "start" "-a" "a920a865090d62fd98ab1846231c186a75bcc56dc35181d50a5c4e533fd7aff4", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling crc16 v0.4.0
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]     Checking fixed-queue v0.3.10
[INFO] [stderr]     Checking unmp-id v2.0.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]     Checking futures-intrusive v0.4.0
[INFO] [stderr]     Checking eds v0.4.4
[INFO] [stderr]     Checking task-stream v0.3.3
[INFO] [stderr]     Checking unmp-link v0.7.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.1
[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/eds-0.4.4/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(const_panic)]
[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 `eds` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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/unmp-link-0.7.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(const_btree_new)]
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "a920a865090d62fd98ab1846231c186a75bcc56dc35181d50a5c4e533fd7aff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a920a865090d62fd98ab1846231c186a75bcc56dc35181d50a5c4e533fd7aff4", kill_on_drop: false }`
[INFO] [stdout] a920a865090d62fd98ab1846231c186a75bcc56dc35181d50a5c4e533fd7aff4
