[INFO] updating cached repository https://github.com/tedgkassen/rust-slackbot
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0e534fc25874e972c4bb2a8c41774a7f1e896208
[INFO] testing tedgkassen/rust-slackbot against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftedgkassen%2Frust-slackbot" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tedgkassen/rust-slackbot on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tedgkassen/rust-slackbot
[INFO] finished tweaking git repo https://github.com/tedgkassen/rust-slackbot
[INFO] tweaked toml for git repo https://github.com/tedgkassen/rust-slackbot written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/tedgkassen/rust-slackbot already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] aa379fb44c73d215918db17b191454622988f70e56f864038ef4880d504111fe
[INFO] running `"docker" "start" "-a" "aa379fb44c73d215918db17b191454622988f70e56f864038ef4880d504111fe"`
[INFO] [stderr]    Compiling openssl v0.10.12
[INFO] [stderr]    Compiling native-tls v0.2.1
[INFO] [stderr]    Compiling encoding_rs v0.8.10
[INFO] [stderr]    Compiling utf-8 v0.7.4
[INFO] [stderr]    Compiling subprocess v0.1.16
[INFO] [stderr]    Compiling openssl-sys v0.9.36
[INFO] [stderr]    Compiling mysqlclient-sys v0.2.3
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling bytes v0.4.10
[INFO] [stderr]    Compiling want v0.0.6
[INFO] [stderr]    Compiling lock_api v0.1.4
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling toml v0.4.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.5.2
[INFO] [stderr]    Compiling serde_json v1.0.32
[INFO] [stderr]    Compiling mime v0.3.9
[INFO] [stderr]    Compiling serde_urlencoded v0.5.3
[INFO] [stderr]    Compiling diesel_derives v1.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling syn v0.15.9
[INFO] [stderr]    Compiling libflate v0.1.18
[INFO] [stderr]    Compiling crossbeam-deque v0.6.1
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling sha-1 v0.7.0
[INFO] [stderr]    Compiling tokio-io v0.1.9
[INFO] [stderr]    Compiling http v0.1.13
[INFO] [stderr]    Compiling input_buffer v0.2.0
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling tokio-threadpool v0.1.7
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling tokio-reactor v0.1.6
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-fs v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-udp v0.1.2
[INFO] [stderr]    Compiling tokio-uds v0.2.2
[INFO] [stderr]    Compiling h2 v0.1.12
[INFO] [stderr]    Compiling tokio v0.1.11
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]    Compiling diesel v1.3.3
[INFO] [stderr]    Compiling tungstenite v0.6.0
[INFO] [stderr]    Compiling hyper v0.12.11
[INFO] [stderr]    Compiling hyper-tls v0.3.1
[INFO] [stderr]    Compiling reqwest v0.9.2
[INFO] [stderr]    Compiling slack_api v0.21.0
[INFO] [stderr]    Compiling slack v0.22.0
[INFO] [stderr]    Compiling mugman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/standardmessagedispatcher.rs:14:23
[INFO] [stderr]    |
[INFO] [stderr] 14 |     handlers: Vec<Box<StandardMessageHandler>>,
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn StandardMessageHandler`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/standardmessagedispatcher.rs:19:29
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let mut rs: Vec<Box<StandardMessageHandler>> = Vec::new();
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn StandardMessageHandler`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `mugman`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "aa379fb44c73d215918db17b191454622988f70e56f864038ef4880d504111fe"`
[INFO] running `"docker" "rm" "-f" "aa379fb44c73d215918db17b191454622988f70e56f864038ef4880d504111fe"`
[INFO] [stdout] aa379fb44c73d215918db17b191454622988f70e56f864038ef4880d504111fe