[INFO] updating cached repository dcastelltort/rusty-chip8
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dcastelltort/rusty-chip8
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dcastelltort/rusty-chip8" "work/ex/beta-1.38-1/sources/1.37.0/gh/dcastelltort/rusty-chip8"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dcastelltort/rusty-chip8'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dcastelltort/rusty-chip8" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dcastelltort/rusty-chip8"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dcastelltort/rusty-chip8'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ba9b44d5f7544aceb4f40a965d49f18413abef9d
[INFO] sha for GitHub repo dcastelltort/rusty-chip8: ba9b44d5f7544aceb4f40a965d49f18413abef9d
[INFO] validating manifest of dcastelltort/rusty-chip8 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 dcastelltort/rusty-chip8 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 dcastelltort/rusty-chip8
[INFO] finished frobbing dcastelltort/rusty-chip8
[INFO] frobbed toml for dcastelltort/rusty-chip8 written to work/ex/beta-1.38-1/sources/1.37.0/gh/dcastelltort/rusty-chip8/Cargo.toml
[INFO] started frobbing dcastelltort/rusty-chip8
[INFO] finished frobbing dcastelltort/rusty-chip8
[INFO] frobbed toml for dcastelltort/rusty-chip8 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dcastelltort/rusty-chip8/Cargo.toml
[INFO] crate dcastelltort/rusty-chip8 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 dcastelltort/rusty-chip8 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-7/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/dcastelltort/rusty-chip8:/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] 199ad2a64e7b3f7ba67708ba493a4c56b46e264dd264aa14287cc166fb1b0c82
[INFO] running `"docker" "start" "-a" "199ad2a64e7b3f7ba67708ba493a4c56b46e264dd264aa14287cc166fb1b0c82"`
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling serde_json v1.0.19
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling rayon v0.9.0
[INFO] [stderr]    Compiling env_logger v0.5.10
[INFO] [stderr]    Compiling structopt-derive v0.2.8
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]    Compiling structopt v0.2.8
[INFO] [stderr]    Compiling quicli v0.2.0
[INFO] [stderr]    Compiling rusty-chip8 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:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(fs_read_write)] //TO REMOVE with ugraded nightly or stable
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[macro_use] extern crate failure;
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/cpu.rs:283:11
[INFO] [stderr]     |
[INFO] [stderr] 283 |         if(self.sound_timer > 0)
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/cpu.rs:127:9
[INFO] [stderr]     |
[INFO] [stderr] 127 |         unimplemented!();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/cpu.rs:298:9
[INFO] [stderr]     |
[INFO] [stderr] 298 |         Ok(())
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/cpu.rs:318:9
[INFO] [stderr]     |
[INFO] [stderr] 318 |         Ok(())
[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 `rusty-chip8`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "199ad2a64e7b3f7ba67708ba493a4c56b46e264dd264aa14287cc166fb1b0c82"`
[INFO] running `"docker" "rm" "-f" "199ad2a64e7b3f7ba67708ba493a4c56b46e264dd264aa14287cc166fb1b0c82"`
[INFO] [stdout] 199ad2a64e7b3f7ba67708ba493a4c56b46e264dd264aa14287cc166fb1b0c82