[INFO] updating cached repository cookie-s/very-simple-slack-rtm-client-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cookie-s/very-simple-slack-rtm-client-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cookie-s/very-simple-slack-rtm-client-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/cookie-s/very-simple-slack-rtm-client-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cookie-s/very-simple-slack-rtm-client-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cookie-s/very-simple-slack-rtm-client-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cookie-s/very-simple-slack-rtm-client-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cookie-s/very-simple-slack-rtm-client-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cbb82bf95a2cd8b757250dffe538e11476c3ab2b
[INFO] sha for GitHub repo cookie-s/very-simple-slack-rtm-client-rs: cbb82bf95a2cd8b757250dffe538e11476c3ab2b
[INFO] validating manifest of cookie-s/very-simple-slack-rtm-client-rs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cookie-s/very-simple-slack-rtm-client-rs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cookie-s/very-simple-slack-rtm-client-rs
[INFO] finished frobbing cookie-s/very-simple-slack-rtm-client-rs
[INFO] frobbed toml for cookie-s/very-simple-slack-rtm-client-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/cookie-s/very-simple-slack-rtm-client-rs/Cargo.toml
[INFO] started frobbing cookie-s/very-simple-slack-rtm-client-rs
[INFO] finished frobbing cookie-s/very-simple-slack-rtm-client-rs
[INFO] frobbed toml for cookie-s/very-simple-slack-rtm-client-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cookie-s/very-simple-slack-rtm-client-rs/Cargo.toml
[INFO] crate cookie-s/very-simple-slack-rtm-client-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cookie-s/very-simple-slack-rtm-client-rs against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cookie-s/very-simple-slack-rtm-client-rs:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 57d4788a0a066a5d69ef6f47e1b025ac6e272d075ae1b4453fe96d502c45f0ce
[INFO] running `"docker" "start" "-a" "57d4788a0a066a5d69ef6f47e1b025ac6e272d075ae1b4453fe96d502c45f0ce"`
[INFO] [stderr]    Compiling futures v0.1.22
[INFO] [stderr]    Compiling sha1 v0.4.0
[INFO] [stderr]    Compiling rust-ini v0.12.2
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling encoding_rs v0.7.2
[INFO] [stderr]    Compiling unicase v2.1.0
[INFO] [stderr]    Compiling openssl-sys v0.9.33
[INFO] [stderr]    Compiling uuid v0.6.5
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling input_buffer v0.1.1
[INFO] [stderr]    Compiling nom v4.0.0
[INFO] [stderr]    Compiling serde_json v1.0.22
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling phf_shared v0.7.22
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling libflate v0.1.16
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]    Compiling phf_generator v0.7.22
[INFO] [stderr]    Compiling phf v0.7.22
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling mime v0.3.8
[INFO] [stderr]    Compiling url v1.7.1
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling tokio-executor v0.1.2
[INFO] [stderr]    Compiling tokio-io v0.1.7
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling want v0.0.4
[INFO] [stderr]    Compiling relay v0.1.1
[INFO] [stderr]    Compiling phf_codegen v0.7.22
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling tokio-threadpool v0.1.5
[INFO] [stderr]    Compiling tokio-timer v0.2.4
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.5
[INFO] [stderr]    Compiling tokio-codec v0.1.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.2
[INFO] [stderr]    Compiling serde_urlencoded v0.5.2
[INFO] [stderr]    Compiling tokio-fs v0.1.2
[INFO] [stderr]    Compiling tokio-udp v0.1.1
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio v0.1.7
[INFO] [stderr]    Compiling serde-hjson v0.8.1
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling tungstenite v0.5.4
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling config v0.9.0
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling hyper v0.11.27
[INFO] [stderr]    Compiling hyper-tls v0.1.3
[INFO] [stderr]    Compiling reqwest v0.8.6
[INFO] [stderr]    Compiling slack_api v0.20.0 (https://github.com/cookie-s/slack-rs-api#b43af37c)
[INFO] [stderr]    Compiling slack v0.21.0
[INFO] [stderr]    Compiling very-simple-slack-rtm-client v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, box_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `very-simple-slack-rtm-client`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "57d4788a0a066a5d69ef6f47e1b025ac6e272d075ae1b4453fe96d502c45f0ce"`
[INFO] running `"docker" "rm" "-f" "57d4788a0a066a5d69ef6f47e1b025ac6e272d075ae1b4453fe96d502c45f0ce"`
[INFO] [stdout] 57d4788a0a066a5d69ef6f47e1b025ac6e272d075ae1b4453fe96d502c45f0ce