[INFO] fetching crate syslog_rfc3164 0.1.0...
[INFO] testing syslog_rfc3164-0.1.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate syslog_rfc3164 0.1.0 into /workspace/builds/worker-90/source
[INFO] validating manifest of crates.io crate syslog_rfc3164 0.1.0 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 syslog_rfc3164 0.1.0
[INFO] finished tweaking crates.io crate syslog_rfc3164 0.1.0
[INFO] tweaked toml for crates.io crate syslog_rfc3164 0.1.0 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] [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-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] b140ddb711fe16b50cf3d7df3f23d316cf96b81e7dc515c503f15d491f98c372
[INFO] running `Command { std: "docker" "start" "-a" "b140ddb711fe16b50cf3d7df3f23d316cf96b81e7dc515c503f15d491f98c372", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b140ddb711fe16b50cf3d7df3f23d316cf96b81e7dc515c503f15d491f98c372", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b140ddb711fe16b50cf3d7df3f23d316cf96b81e7dc515c503f15d491f98c372", kill_on_drop: false }`
[INFO] [stdout] b140ddb711fe16b50cf3d7df3f23d316cf96b81e7dc515c503f15d491f98c372
[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] 90d81813b4ba2a21c6833cfe19b7c16ad5f84ab9cbc33c6bcacb7767a21ae3c3
[INFO] running `Command { std: "docker" "start" "-a" "90d81813b4ba2a21c6833cfe19b7c16ad5f84ab9cbc33c6bcacb7767a21ae3c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling assert_matches v1.5.0
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling syslog_rfc3164 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | #![feature(match_default_bindings)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `match_default_bindings` has been stable since 1.26.0 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 `syslog_rfc3164` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "90d81813b4ba2a21c6833cfe19b7c16ad5f84ab9cbc33c6bcacb7767a21ae3c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90d81813b4ba2a21c6833cfe19b7c16ad5f84ab9cbc33c6bcacb7767a21ae3c3", kill_on_drop: false }`
[INFO] [stdout] 90d81813b4ba2a21c6833cfe19b7c16ad5f84ab9cbc33c6bcacb7767a21ae3c3
