[INFO] updating cached repository ranxiverba/vru
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ranxiverba/vru
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ranxiverba/vru" "work/ex/beta-1.38-1/sources/1.37.0/gh/ranxiverba/vru"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ranxiverba/vru'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ranxiverba/vru" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ranxiverba/vru"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ranxiverba/vru'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 09bc627a14f1abd5c5b4a4b565cd57501ed72da8
[INFO] sha for GitHub repo ranxiverba/vru: 09bc627a14f1abd5c5b4a4b565cd57501ed72da8
[INFO] validating manifest of ranxiverba/vru 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 ranxiverba/vru 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 ranxiverba/vru
[INFO] finished frobbing ranxiverba/vru
[INFO] frobbed toml for ranxiverba/vru written to work/ex/beta-1.38-1/sources/1.37.0/gh/ranxiverba/vru/Cargo.toml
[INFO] started frobbing ranxiverba/vru
[INFO] finished frobbing ranxiverba/vru
[INFO] frobbed toml for ranxiverba/vru written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ranxiverba/vru/Cargo.toml
[INFO] crate ranxiverba/vru 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 ranxiverba/vru 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ranxiverba/vru:/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] 4312fde97ac4682d2ea525ed6442eb2b3f048276bf1bab251fbf4ea433c2f4b5
[INFO] running `"docker" "start" "-a" "4312fde97ac4682d2ea525ed6442eb2b3f048276bf1bab251fbf4ea433c2f4b5"`
[INFO] [stderr]    Compiling libc v0.2.56
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling historian v4.0.3
[INFO] [stderr]    Compiling keystream v1.0.0
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling secp256k1 v0.13.0
[INFO] [stderr]    Compiling tokio-sync v0.1.5
[INFO] [stderr]    Compiling chacha20-poly1305-aead v0.1.2
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling chacha v0.3.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling nix v0.13.0
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling env_logger v0.6.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio v0.1.21
[INFO] [stderr]    Compiling ctrlc v3.1.2
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling hashbrown v0.2.2
[INFO] [stderr]    Compiling serde_bytes v0.11.1
[INFO] [stderr]    Compiling tirse v0.6.0
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling hmac v0.7.0
[INFO] [stderr]    Compiling abstract-cryptography v0.3.0 (https://github.com/ranxiverba/abstract-cryptography.git#7e71c96d)
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling hkdf v0.7.0
[INFO] [stderr]    Compiling pagecache v0.16.2
[INFO] [stderr]    Compiling savru v0.2.0 (https://github.com/ranxiverba/savru.git#10066663)
[INFO] [stderr]    Compiling mlatu v0.1.0 (https://github.com/ranxiverba/mlatu.git#04158992)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/savru-00ad57dc9a3f9464/1006666/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(await_macro, async_await)]
[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 `savru`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4312fde97ac4682d2ea525ed6442eb2b3f048276bf1bab251fbf4ea433c2f4b5"`
[INFO] running `"docker" "rm" "-f" "4312fde97ac4682d2ea525ed6442eb2b3f048276bf1bab251fbf4ea433c2f4b5"`
[INFO] [stdout] 4312fde97ac4682d2ea525ed6442eb2b3f048276bf1bab251fbf4ea433c2f4b5