[INFO] updating cached repository mammothbane/thulani
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mammothbane/thulani
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mammothbane/thulani" "work/ex/beta-1.38-1/sources/1.37.0/gh/mammothbane/thulani"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mammothbane/thulani'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mammothbane/thulani" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mammothbane/thulani"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mammothbane/thulani'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 54f729b3e2315e7d70f8daa01132cb233d302b1c
[INFO] sha for GitHub repo mammothbane/thulani: 54f729b3e2315e7d70f8daa01132cb233d302b1c
[INFO] validating manifest of mammothbane/thulani 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 mammothbane/thulani 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 mammothbane/thulani
[INFO] finished frobbing mammothbane/thulani
[INFO] frobbed toml for mammothbane/thulani written to work/ex/beta-1.38-1/sources/1.37.0/gh/mammothbane/thulani/Cargo.toml
[INFO] started frobbing mammothbane/thulani
[INFO] finished frobbing mammothbane/thulani
[INFO] frobbed toml for mammothbane/thulani written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mammothbane/thulani/Cargo.toml
[INFO] crate mammothbane/thulani 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 mammothbane/thulani 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mammothbane/thulani:/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] 79bae5ca8da90a17d2a478fedbb99eda259d386c3edca442dcddb09b64fdcf59
[INFO] running `"docker" "start" "-a" "79bae5ca8da90a17d2a478fedbb99eda259d386c3edca442dcddb09b64fdcf59"`
[INFO] [stderr]    Compiling either v1.5.1
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling colored v1.7.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling opus-sys v0.2.1
[INFO] [stderr]    Compiling pest v2.1.0
[INFO] [stderr]    Compiling encoding_rs v0.8.17
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling bindgen v0.37.4
[INFO] [stderr]    Compiling libflate v0.1.20
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling statrs v0.10.0
[INFO] [stderr]    Compiling fern v0.5.7
[INFO] [stderr]    Compiling syn v0.15.27
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling tokio-executor v0.1.6
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling openssl-sys v0.9.42
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling uuid v0.7.2
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling http v0.1.16
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling pest_meta v2.1.0
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling cexpr v0.2.3
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling tokio-current-thread v0.1.5
[INFO] [stderr]    Compiling tokio-timer v0.2.10
[INFO] [stderr]    Compiling opus v0.2.1
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling openssl v0.10.19
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling clang-sys v0.23.0
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling flate2 v1.0.6
[INFO] [stderr]    Compiling postgres-protocol v0.3.2
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling tokio-threadpool v0.1.12
[INFO] [stderr]    Compiling ctrlc v3.1.1
[INFO] [stderr]    Compiling mime_guess v1.8.6
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling isolang v0.2.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling h2 v0.1.16
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]    Compiling tokio v0.1.16
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling hyper-native-tls v0.3.0
[INFO] [stderr]    Compiling evzht9h3nznqzwl v0.0.2 (https://github.com/mammothbane/rust-websocket#3986bfae)
[INFO] [stderr]    Compiling multipart v0.13.6
[INFO] [stderr]    Compiling dotenv v0.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling diesel_derives v1.4.0
[INFO] [stderr]    Compiling dotenv_codegen_impl v0.1.0
[INFO] [stderr]    Compiling hyper v0.12.25
[INFO] [stderr]    Compiling dotenv_codegen v0.11.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling hyper-tls v0.3.1
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling dotenv v0.13.0
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling libsodium-sys v0.1.0
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling serde_urlencoded v0.5.4
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling sodiumoxide v0.1.0
[INFO] [stderr]    Compiling postgres-shared v0.4.2
[INFO] [stderr]    Compiling diesel v1.4.1
[INFO] [stderr]    Compiling reqwest v0.9.10
[INFO] [stderr]    Compiling serenity v0.5.11 (https://github.com/mammothbane/serenity#ac5157ea)
[INFO] [stderr]    Compiling postgres v0.15.2
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/git/checkouts/serenity-b4bbfba5af518d5d/ac5157e/src/lib.rs:112:1
[INFO] [stderr]     |
[INFO] [stderr] 112 | #![feature(custom_attribute)]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling r2d2_postgres v0.14.0
[INFO] [stderr]    Compiling timeago v0.1.5
[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 `serenity`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "79bae5ca8da90a17d2a478fedbb99eda259d386c3edca442dcddb09b64fdcf59"`
[INFO] running `"docker" "rm" "-f" "79bae5ca8da90a17d2a478fedbb99eda259d386c3edca442dcddb09b64fdcf59"`
[INFO] [stdout] 79bae5ca8da90a17d2a478fedbb99eda259d386c3edca442dcddb09b64fdcf59