[INFO] updating cached repository FTB-Gamepedia/bunnybutt-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/FTB-Gamepedia/bunnybutt-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/FTB-Gamepedia/bunnybutt-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/FTB-Gamepedia/bunnybutt-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/FTB-Gamepedia/bunnybutt-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FTB-Gamepedia/bunnybutt-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FTB-Gamepedia/bunnybutt-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FTB-Gamepedia/bunnybutt-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b1ee75a512a20d10a87c2efa2ca0299d06d446d7
[INFO] sha for GitHub repo FTB-Gamepedia/bunnybutt-rs: b1ee75a512a20d10a87c2efa2ca0299d06d446d7
[INFO] validating manifest of FTB-Gamepedia/bunnybutt-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 FTB-Gamepedia/bunnybutt-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 FTB-Gamepedia/bunnybutt-rs
[INFO] finished frobbing FTB-Gamepedia/bunnybutt-rs
[INFO] frobbed toml for FTB-Gamepedia/bunnybutt-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/FTB-Gamepedia/bunnybutt-rs/Cargo.toml
[INFO] started frobbing FTB-Gamepedia/bunnybutt-rs
[INFO] finished frobbing FTB-Gamepedia/bunnybutt-rs
[INFO] frobbed toml for FTB-Gamepedia/bunnybutt-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FTB-Gamepedia/bunnybutt-rs/Cargo.toml
[INFO] crate FTB-Gamepedia/bunnybutt-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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing FTB-Gamepedia/bunnybutt-rs against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FTB-Gamepedia/bunnybutt-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] ae635ed50de476c9a5f34729abd2039d4f836e0f35b02c1ed7e17d52188aa208
[INFO] running `"docker" "start" "-a" "ae635ed50de476c9a5f34729abd2039d4f836e0f35b02c1ed7e17d52188aa208"`
[INFO] [stderr]    Compiling cfg-if v0.1.4
[INFO] [stderr]    Compiling byteorder v1.2.4
[INFO] [stderr]    Compiling cc v1.0.18
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]    Compiling matches v0.1.7
[INFO] [stderr]    Compiling try-lock v0.1.0
[INFO] [stderr]    Compiling serde v1.0.71
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling antidote v1.0.0
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling unicase v2.1.0
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling tokio-executor v0.1.3
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling relay v0.1.1
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling encoding_rs v0.7.2
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling bytes v0.4.9
[INFO] [stderr]    Compiling base64 v0.9.2
[INFO] [stderr]    Compiling base64 v0.6.0
[INFO] [stderr]    Compiling cookie v0.10.1
[INFO] [stderr]    Compiling irc v0.11.8
[INFO] [stderr]    Compiling aho-corasick v0.6.6
[INFO] [stderr]    Compiling tokio-timer v0.2.5
[INFO] [stderr]    Compiling uuid v0.6.5
[INFO] [stderr]    Compiling want v0.0.4
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling mio v0.6.15
[INFO] [stderr]    Compiling quote v0.6.5
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling tokio-io v0.1.7
[INFO] [stderr]    Compiling openssl-sys v0.9.35
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.3
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling syn v0.14.7
[INFO] [stderr]    Compiling phf_shared v0.7.22
[INFO] [stderr]    Compiling tokio-codec v0.1.0
[INFO] [stderr]    Compiling mime v0.3.8
[INFO] [stderr]    Compiling url v1.7.1
[INFO] [stderr]    Compiling libflate v0.1.16
[INFO] [stderr]    Compiling tokio-reactor v0.1.3
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling phf_generator v0.7.22
[INFO] [stderr]    Compiling phf v0.7.22
[INFO] [stderr]    Compiling tokio-threadpool v0.1.5
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling tokio-udp v0.1.1
[INFO] [stderr]    Compiling tokio-tcp v0.1.1
[INFO] [stderr]    Compiling phf_codegen v0.7.22
[INFO] [stderr]    Compiling hyper v0.10.13
[INFO] [stderr]    Compiling tokio-fs v0.1.3
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling tokio v0.1.7
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling hyper v0.11.27
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling hyper-native-tls v0.2.4
[INFO] [stderr]    Compiling serde_urlencoded v0.5.2
[INFO] [stderr]    Compiling serde_json v1.0.24
[INFO] [stderr]    Compiling serde_derive v1.0.71
[INFO] [stderr]    Compiling googl v0.1.0
[INFO] [stderr]    Compiling hyper-tls v0.1.4
[INFO] [stderr]    Compiling reqwest v0.8.7
[INFO] [stderr]    Compiling mediawiki v0.0.1 (https://github.com/FTB-Gamepedia/mediawiki-rs.git#09758494)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/mediawiki-rs-ccdb6ca811e3accb/0975849/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(try_trait)]
[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 `mediawiki`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ae635ed50de476c9a5f34729abd2039d4f836e0f35b02c1ed7e17d52188aa208"`
[INFO] running `"docker" "rm" "-f" "ae635ed50de476c9a5f34729abd2039d4f836e0f35b02c1ed7e17d52188aa208"`
[INFO] [stdout] ae635ed50de476c9a5f34729abd2039d4f836e0f35b02c1ed7e17d52188aa208