[INFO] updating cached repository djmcgill/de-list-server
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/djmcgill/de-list-server
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/djmcgill/de-list-server" "work/ex/beta-1.38-1/sources/1.37.0/gh/djmcgill/de-list-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/djmcgill/de-list-server'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/djmcgill/de-list-server" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/djmcgill/de-list-server"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/djmcgill/de-list-server'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e2d32b09c0b015f5751e8363c875170be4a6885a
[INFO] sha for GitHub repo djmcgill/de-list-server: e2d32b09c0b015f5751e8363c875170be4a6885a
[INFO] validating manifest of djmcgill/de-list-server 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 djmcgill/de-list-server 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 djmcgill/de-list-server
[INFO] finished frobbing djmcgill/de-list-server
[INFO] frobbed toml for djmcgill/de-list-server written to work/ex/beta-1.38-1/sources/1.37.0/gh/djmcgill/de-list-server/Cargo.toml
[INFO] started frobbing djmcgill/de-list-server
[INFO] finished frobbing djmcgill/de-list-server
[INFO] frobbed toml for djmcgill/de-list-server written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/djmcgill/de-list-server/Cargo.toml
[INFO] crate djmcgill/de-list-server 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 djmcgill/de-list-server 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/djmcgill/de-list-server:/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] 95a66b98a14f8b6890fed48304ca0aa9f3b0e97d5170cbf45359fcf87e1778a8
[INFO] running `"docker" "start" "-a" "95a66b98a14f8b6890fed48304ca0aa9f3b0e97d5170cbf45359fcf87e1778a8"`
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling cc v1.0.34
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling openssl v0.10.20
[INFO] [stderr]    Compiling fallible-streaming-iterator v0.1.9
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling tokio-sync v0.1.4
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.14
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-core-preview-0.3.0-alpha.14/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(futures_api)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling relay v0.1.1
[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 `futures-core-preview`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "95a66b98a14f8b6890fed48304ca0aa9f3b0e97d5170cbf45359fcf87e1778a8"`
[INFO] running `"docker" "rm" "-f" "95a66b98a14f8b6890fed48304ca0aa9f3b0e97d5170cbf45359fcf87e1778a8"`
[INFO] [stdout] 95a66b98a14f8b6890fed48304ca0aa9f3b0e97d5170cbf45359fcf87e1778a8