[INFO] updating cached repository insanitybit/spam_detection
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/insanitybit/spam_detection
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/insanitybit/spam_detection" "work/ex/beta-1.38-1/sources/1.37.0/gh/insanitybit/spam_detection"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/insanitybit/spam_detection'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/insanitybit/spam_detection" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/insanitybit/spam_detection"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/insanitybit/spam_detection'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 576ba4678b93d19fb0950ba88aef8c79abd7dd25
[INFO] sha for GitHub repo insanitybit/spam_detection: 576ba4678b93d19fb0950ba88aef8c79abd7dd25
[INFO] validating manifest of insanitybit/spam_detection 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 insanitybit/spam_detection 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 insanitybit/spam_detection
[INFO] finished frobbing insanitybit/spam_detection
[INFO] frobbed toml for insanitybit/spam_detection written to work/ex/beta-1.38-1/sources/1.37.0/gh/insanitybit/spam_detection/Cargo.toml
[INFO] started frobbing insanitybit/spam_detection
[INFO] finished frobbing insanitybit/spam_detection
[INFO] frobbed toml for insanitybit/spam_detection written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/insanitybit/spam_detection/Cargo.toml
[INFO] crate insanitybit/spam_detection 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 insanitybit/spam_detection 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-5/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/insanitybit/spam_detection:/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] 8c3b3b588f4fd7fc2b7df7a6cdb034e6fbfd437e221770c19b820245a5f92f09
[INFO] running `"docker" "start" "-a" "8c3b3b588f4fd7fc2b7df7a6cdb034e6fbfd437e221770c19b820245a5f92f09"`
[INFO] [stderr]    Compiling openssl v0.9.19
[INFO] [stderr]    Compiling either v1.2.0
[INFO] [stderr]    Compiling derive_builder v0.5.0
[INFO] [stderr]    Compiling string_morph v0.1.0
[INFO] [stderr]    Compiling base64 v0.1.1
[INFO] [stderr]    Compiling quoted_printable v0.3.3
[INFO] [stderr]    Compiling lru_time_cache v0.7.0
[INFO] [stderr]    Compiling openssl-sys v0.9.19
[INFO] [stderr]    Compiling iovec v0.1.1
[INFO] [stderr]    Compiling net2 v0.2.31
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling relay v0.1.0
[INFO] [stderr]    Compiling utf-8 v0.7.1
[INFO] [stderr]    Compiling rustlearn v0.4.2
[INFO] [stderr]    Compiling libflate v0.1.11
[INFO] [stderr]    Compiling parking_lot_core v0.2.6
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling uuid v0.4.0
[INFO] [stderr]    Compiling twox-hash v1.1.0
[INFO] [stderr]    Compiling coco v0.2.1
[INFO] [stderr]    Compiling coco v0.1.1
[INFO] [stderr]    Compiling debug_unreachable v0.1.1
[INFO] [stderr]    Compiling bytes v0.4.5
[INFO] [stderr]    Compiling futures-cpupool v0.1.6
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling num-bigint v0.1.40
[INFO] [stderr]    Compiling mio v0.6.10
[INFO] [stderr]    Compiling parking_lot v0.4.8
[INFO] [stderr]    Compiling futf v0.1.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.14
[INFO] [stderr]    Compiling rayon-core v1.2.1
[INFO] [stderr]    Compiling tokio-io v0.1.3
[INFO] [stderr]    Compiling mailparse v0.5.1
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling tendril v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.3
[INFO] [stderr]    Compiling channel v0.1.0 (https://github.com/stjepang/channel?rev=949ce33946d9e4686386ebbbe022b71de9b20950#949ce339)
[INFO] [stderr]    Compiling redis v0.8.0
[INFO] [stderr]    Compiling rayon v0.8.2
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling mime v0.3.4
[INFO] [stderr]    Compiling tokio-core v0.1.10
[INFO] [stderr]    Compiling num-rational v0.1.39
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.0
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling sentiment v0.1.1 (https://github.com/insanitybit/sentiment#84ebf78e)
[INFO] [stderr]    Compiling num v0.1.40
[INFO] [stderr]    Compiling derive_builder_core v0.1.7
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling aktors v0.1.0 (https://github.com/insanitybit/aktors?branch=Rewrite#b38d08d2)
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.2
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/aktors-2e036e7105bef9e2/b38d08d/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(conservative_impl_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 `aktors`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8c3b3b588f4fd7fc2b7df7a6cdb034e6fbfd437e221770c19b820245a5f92f09"`
[INFO] running `"docker" "rm" "-f" "8c3b3b588f4fd7fc2b7df7a6cdb034e6fbfd437e221770c19b820245a5f92f09"`
[INFO] [stdout] 8c3b3b588f4fd7fc2b7df7a6cdb034e6fbfd437e221770c19b820245a5f92f09