[INFO] updating cached repository themadprofessor/waah_bot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/themadprofessor/waah_bot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/themadprofessor/waah_bot" "work/ex/beta-1.37-6/sources/1.36.0/gh/themadprofessor/waah_bot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/themadprofessor/waah_bot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/themadprofessor/waah_bot" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/themadprofessor/waah_bot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/themadprofessor/waah_bot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 06dffc78225264082c03f74cc7255e60bf2f58a6
[INFO] sha for GitHub repo themadprofessor/waah_bot: 06dffc78225264082c03f74cc7255e60bf2f58a6
[INFO] validating manifest of themadprofessor/waah_bot on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of themadprofessor/waah_bot on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing themadprofessor/waah_bot
[INFO] finished frobbing themadprofessor/waah_bot
[INFO] frobbed toml for themadprofessor/waah_bot written to work/ex/beta-1.37-6/sources/1.36.0/gh/themadprofessor/waah_bot/Cargo.toml
[INFO] started frobbing themadprofessor/waah_bot
[INFO] finished frobbing themadprofessor/waah_bot
[INFO] frobbed toml for themadprofessor/waah_bot written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/themadprofessor/waah_bot/Cargo.toml
[INFO] crate themadprofessor/waah_bot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing themadprofessor/waah_bot against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/themadprofessor/waah_bot:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 31a346fe5abc83598e040bd13d824df05e970f2d5097f83e170be8dabe34d3c2
[INFO] running `"docker" "start" "-a" "31a346fe5abc83598e040bd13d824df05e970f2d5097f83e170be8dabe34d3c2"`
[INFO] [stderr]    Compiling serde v1.0.52
[INFO] [stderr]    Compiling directories v0.10.0
[INFO] [stderr]    Compiling openssl-sys v0.9.30
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling base64 v0.6.0
[INFO] [stderr]    Compiling base64 v0.8.0
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling syn v0.13.7
[INFO] [stderr]    Compiling tokio-threadpool v0.1.3
[INFO] [stderr]    Compiling parking_lot v0.5.5
[INFO] [stderr]    Compiling mime_guess v1.8.4
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.4
[INFO] [stderr]    Compiling serde-hjson v0.8.1
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling flate2 v1.0.1
[INFO] [stderr]    Compiling hyper v0.10.13
[INFO] [stderr]    Compiling tokio-reactor v0.1.1
[INFO] [stderr]    Compiling tokio-fs v0.1.0
[INFO] [stderr]    Compiling tokio-udp v0.1.0
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio v0.1.6
[INFO] [stderr]    Compiling serde_derive v1.0.52
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling serde_urlencoded v0.5.1
[INFO] [stderr]    Compiling serde_json v1.0.17
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling multipart v0.13.6
[INFO] [stderr]    Compiling hyper-native-tls v0.2.4
[INFO] [stderr]    Compiling evzht9h3nznqzwl v0.0.3
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling hyper v0.11.26
[INFO] [stderr]    Compiling config v0.8.0
[INFO] [stderr]    Compiling serenity v0.5.3
[INFO] [stderr]    Compiling hyper-tls v0.1.3
[INFO] [stderr]    Compiling reqwest v0.8.5
[INFO] [stderr]    Compiling discord_bot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(process_exitcode_placeholder)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Channel`
[INFO] [stderr]  --> src/cmd.rs:1:41
[INFO] [stderr]   |
[INFO] [stderr] 1 | use serenity::model::channel::{Message, Channel};
[INFO] [stderr]   |                                         ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[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 `discord_bot`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "31a346fe5abc83598e040bd13d824df05e970f2d5097f83e170be8dabe34d3c2"`
[INFO] running `"docker" "rm" "-f" "31a346fe5abc83598e040bd13d824df05e970f2d5097f83e170be8dabe34d3c2"`
[INFO] [stdout] 31a346fe5abc83598e040bd13d824df05e970f2d5097f83e170be8dabe34d3c2