[INFO] updating cached repository subjectdenied/rust-diceroller
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/subjectdenied/rust-diceroller
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/subjectdenied/rust-diceroller" "work/ex/beta-1.38-1/sources/1.37.0/gh/subjectdenied/rust-diceroller"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/subjectdenied/rust-diceroller'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/subjectdenied/rust-diceroller" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/subjectdenied/rust-diceroller"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/subjectdenied/rust-diceroller'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 944351ed8a76511bfb05c8b18e8500ef92ab90c0
[INFO] sha for GitHub repo subjectdenied/rust-diceroller: 944351ed8a76511bfb05c8b18e8500ef92ab90c0
[INFO] validating manifest of subjectdenied/rust-diceroller 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 subjectdenied/rust-diceroller 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 subjectdenied/rust-diceroller
[INFO] finished frobbing subjectdenied/rust-diceroller
[INFO] frobbed toml for subjectdenied/rust-diceroller written to work/ex/beta-1.38-1/sources/1.37.0/gh/subjectdenied/rust-diceroller/Cargo.toml
[INFO] started frobbing subjectdenied/rust-diceroller
[INFO] finished frobbing subjectdenied/rust-diceroller
[INFO] frobbed toml for subjectdenied/rust-diceroller written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/subjectdenied/rust-diceroller/Cargo.toml
[INFO] crate subjectdenied/rust-diceroller 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing subjectdenied/rust-diceroller 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/subjectdenied/rust-diceroller:/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] 8963753ccdcfdd4f1df6c28add2e9a9b0cada05ecb5d7eeefd0fe309f5e15d12
[INFO] running `"docker" "start" "-a" "8963753ccdcfdd4f1df6c28add2e9a9b0cada05ecb5d7eeefd0fe309f5e15d12"`
[INFO] [stderr]    Compiling dice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/rcmd.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::slice::SliceConcatExt::connect': renamed to join
[INFO] [stderr]    --> src/rcmd.rs:124:41
[INFO] [stderr]     |
[INFO] [stderr] 124 |         write!(f, "{} ({})", as_strings.connect(", "), self.total())
[INFO] [stderr]     |                                         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[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 `dice`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8963753ccdcfdd4f1df6c28add2e9a9b0cada05ecb5d7eeefd0fe309f5e15d12"`
[INFO] running `"docker" "rm" "-f" "8963753ccdcfdd4f1df6c28add2e9a9b0cada05ecb5d7eeefd0fe309f5e15d12"`
[INFO] [stdout] 8963753ccdcfdd4f1df6c28add2e9a9b0cada05ecb5d7eeefd0fe309f5e15d12