[INFO] updating cached repository Flarp/DoIWannaKnow
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Flarp/DoIWannaKnow
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Flarp/DoIWannaKnow" "work/ex/beta-1.38-1/sources/1.37.0/gh/Flarp/DoIWannaKnow"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Flarp/DoIWannaKnow'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Flarp/DoIWannaKnow" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Flarp/DoIWannaKnow"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Flarp/DoIWannaKnow'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5d9fda6cba04811ee907a5855bb2ba1c05dc0d39
[INFO] sha for GitHub repo Flarp/DoIWannaKnow: 5d9fda6cba04811ee907a5855bb2ba1c05dc0d39
[INFO] validating manifest of Flarp/DoIWannaKnow 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 Flarp/DoIWannaKnow 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 Flarp/DoIWannaKnow
[INFO] finished frobbing Flarp/DoIWannaKnow
[INFO] frobbed toml for Flarp/DoIWannaKnow written to work/ex/beta-1.38-1/sources/1.37.0/gh/Flarp/DoIWannaKnow/Cargo.toml
[INFO] started frobbing Flarp/DoIWannaKnow
[INFO] finished frobbing Flarp/DoIWannaKnow
[INFO] frobbed toml for Flarp/DoIWannaKnow written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Flarp/DoIWannaKnow/Cargo.toml
[INFO] crate Flarp/DoIWannaKnow 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 Flarp/DoIWannaKnow 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-7/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/Flarp/DoIWannaKnow:/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] 628ef8e677a51ead3ee657ffb52d51c9bce513e34cb1b9df34e3e31a5046790a
[INFO] running `"docker" "start" "-a" "628ef8e677a51ead3ee657ffb52d51c9bce513e34cb1b9df34e3e31a5046790a"`
[INFO] [stderr]    Compiling cc v1.0.1
[INFO] [stderr]    Compiling either v1.2.0
[INFO] [stderr]    Compiling libc v0.2.32
[INFO] [stderr]    Compiling rayon-core v1.2.1
[INFO] [stderr]    Compiling futures v0.1.16
[INFO] [stderr]    Compiling lazy_static v0.2.9
[INFO] [stderr]    Compiling pq-sys v0.4.4
[INFO] [stderr]    Compiling regex-syntax v0.3.9
[INFO] [stderr]    Compiling rustc-demangle v0.1.5
[INFO] [stderr]    Compiling utf8-ranges v0.1.3
[INFO] [stderr]    Compiling byteorder v1.1.0
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/yansi-0.3.4/src/lib.rs:1:32
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature="nightly", feature(const_atomic_bool_new))]
[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 `yansi`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "628ef8e677a51ead3ee657ffb52d51c9bce513e34cb1b9df34e3e31a5046790a"`
[INFO] running `"docker" "rm" "-f" "628ef8e677a51ead3ee657ffb52d51c9bce513e34cb1b9df34e3e31a5046790a"`
[INFO] [stdout] 628ef8e677a51ead3ee657ffb52d51c9bce513e34cb1b9df34e3e31a5046790a