[INFO] updating cached repository Undo-all/blokus-ai-old
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Undo-all/blokus-ai-old
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Undo-all/blokus-ai-old" "work/ex/beta-1.38-1/sources/1.37.0/gh/Undo-all/blokus-ai-old"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Undo-all/blokus-ai-old'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Undo-all/blokus-ai-old" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Undo-all/blokus-ai-old"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Undo-all/blokus-ai-old'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 24e94daab4c86f84a910b237039a82833502e4e5
[INFO] sha for GitHub repo Undo-all/blokus-ai-old: 24e94daab4c86f84a910b237039a82833502e4e5
[INFO] validating manifest of Undo-all/blokus-ai-old 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 Undo-all/blokus-ai-old 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 Undo-all/blokus-ai-old
[INFO] finished frobbing Undo-all/blokus-ai-old
[INFO] frobbed toml for Undo-all/blokus-ai-old written to work/ex/beta-1.38-1/sources/1.37.0/gh/Undo-all/blokus-ai-old/Cargo.toml
[INFO] started frobbing Undo-all/blokus-ai-old
[INFO] finished frobbing Undo-all/blokus-ai-old
[INFO] frobbed toml for Undo-all/blokus-ai-old written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Undo-all/blokus-ai-old/Cargo.toml
[INFO] crate Undo-all/blokus-ai-old 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 Undo-all/blokus-ai-old 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-4/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/Undo-all/blokus-ai-old:/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] 66c1f996c75becd74224ae9b4df9e23169eee298576ebd197fa486c5a013769d
[INFO] running `"docker" "start" "-a" "66c1f996c75becd74224ae9b4df9e23169eee298576ebd197fa486c5a013769d"`
[INFO] [stderr]    Compiling blokus-ai v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand`
[INFO] [stderr]  --> src/game/board/pieces/tile.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use rand;
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/game/board/pieces/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::sync::ONCE_INIT;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/game/board/pieces/mod.rs:31:21
[INFO] [stderr]    |
[INFO] [stderr] 31 | static INIT: Once = ONCE_INIT;
[INFO] [stderr]    |                     ^^^^^^^^^ help: replace the use of the deprecated item: `Once::new()`
[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 `blokus-ai`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "66c1f996c75becd74224ae9b4df9e23169eee298576ebd197fa486c5a013769d"`
[INFO] running `"docker" "rm" "-f" "66c1f996c75becd74224ae9b4df9e23169eee298576ebd197fa486c5a013769d"`
[INFO] [stdout] 66c1f996c75becd74224ae9b4df9e23169eee298576ebd197fa486c5a013769d