[INFO] updating cached repository hexjelly/battlecup-stats
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hexjelly/battlecup-stats
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hexjelly/battlecup-stats" "work/ex/beta-1.38-1/sources/1.37.0/gh/hexjelly/battlecup-stats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hexjelly/battlecup-stats'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hexjelly/battlecup-stats" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hexjelly/battlecup-stats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hexjelly/battlecup-stats'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6be7baa75483a5ad588803d086a049731fb752f2
[INFO] sha for GitHub repo hexjelly/battlecup-stats: 6be7baa75483a5ad588803d086a049731fb752f2
[INFO] validating manifest of hexjelly/battlecup-stats 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 hexjelly/battlecup-stats 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 hexjelly/battlecup-stats
[INFO] finished frobbing hexjelly/battlecup-stats
[INFO] frobbed toml for hexjelly/battlecup-stats written to work/ex/beta-1.38-1/sources/1.37.0/gh/hexjelly/battlecup-stats/Cargo.toml
[INFO] started frobbing hexjelly/battlecup-stats
[INFO] finished frobbing hexjelly/battlecup-stats
[INFO] frobbed toml for hexjelly/battlecup-stats written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hexjelly/battlecup-stats/Cargo.toml
[INFO] crate hexjelly/battlecup-stats 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 hexjelly/battlecup-stats 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hexjelly/battlecup-stats:/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] 88ca8ea2add01cb448b1b4890a68e7707dcffcdc464191823502f505a3eb5911
[INFO] running `"docker" "start" "-a" "88ca8ea2add01cb448b1b4890a68e7707dcffcdc464191823502f505a3eb5911"`
[INFO] [stderr]    Compiling openssl v0.9.6
[INFO] [stderr]    Compiling unicode-segmentation v1.0.1
[INFO] [stderr]    Compiling maud v0.14.0
[INFO] [stderr]    Compiling unicode-bidi v0.2.4
[INFO] [stderr]    Compiling syn v0.10.6
[INFO] [stderr]    Compiling num_cpus v1.2.1
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling serde_json v0.8.4
[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/maud-0.14.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(specialization)]
[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 `maud`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "88ca8ea2add01cb448b1b4890a68e7707dcffcdc464191823502f505a3eb5911"`
[INFO] running `"docker" "rm" "-f" "88ca8ea2add01cb448b1b4890a68e7707dcffcdc464191823502f505a3eb5911"`
[INFO] [stdout] 88ca8ea2add01cb448b1b4890a68e7707dcffcdc464191823502f505a3eb5911