[INFO] updating cached repository ChristianPomales/rust_chip8_emu
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ChristianPomales/rust_chip8_emu
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ChristianPomales/rust_chip8_emu" "work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianPomales/rust_chip8_emu"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianPomales/rust_chip8_emu'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ChristianPomales/rust_chip8_emu" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChristianPomales/rust_chip8_emu"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChristianPomales/rust_chip8_emu'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 376466b9a6090517d46a4dba3ebc171be1b1e2a5
[INFO] sha for GitHub repo ChristianPomales/rust_chip8_emu: 376466b9a6090517d46a4dba3ebc171be1b1e2a5
[INFO] validating manifest of ChristianPomales/rust_chip8_emu 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 ChristianPomales/rust_chip8_emu 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 ChristianPomales/rust_chip8_emu
[INFO] finished frobbing ChristianPomales/rust_chip8_emu
[INFO] frobbed toml for ChristianPomales/rust_chip8_emu written to work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianPomales/rust_chip8_emu/Cargo.toml
[INFO] started frobbing ChristianPomales/rust_chip8_emu
[INFO] finished frobbing ChristianPomales/rust_chip8_emu
[INFO] frobbed toml for ChristianPomales/rust_chip8_emu written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChristianPomales/rust_chip8_emu/Cargo.toml
[INFO] crate ChristianPomales/rust_chip8_emu 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 ChristianPomales/rust_chip8_emu 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianPomales/rust_chip8_emu:/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] 61b5be143ef3fcca60781dd1ba633e44da1508e633174ec0838770494b5ed9c3
[INFO] running `"docker" "start" "-a" "61b5be143ef3fcca60781dd1ba633e44da1508e633174ec0838770494b5ed9c3"`
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling sdl2-sys v0.31.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling sdl2 v0.31.0
[INFO] [stderr]    Compiling chip8_emu v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/chip8.rs:336:21
[INFO] [stderr]     |
[INFO] [stderr] 336 |                 let mut masked_rn: u8 = (rn) & (self.opcode & 0x0FF) as u8;
[INFO] [stderr]     |                     ----^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.88s
[INFO] running `"docker" "inspect" "61b5be143ef3fcca60781dd1ba633e44da1508e633174ec0838770494b5ed9c3"`
[INFO] running `"docker" "rm" "-f" "61b5be143ef3fcca60781dd1ba633e44da1508e633174ec0838770494b5ed9c3"`
[INFO] [stdout] 61b5be143ef3fcca60781dd1ba633e44da1508e633174ec0838770494b5ed9c3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianPomales/rust_chip8_emu:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 29ea2a2f8bcc548401ce4973e0c017063add325f03b8d519feeafba96679a66c
[INFO] running `"docker" "start" "-a" "29ea2a2f8bcc548401ce4973e0c017063add325f03b8d519feeafba96679a66c"`
[INFO] [stderr]    Compiling chip8_emu v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/chip8.rs:336:21
[INFO] [stderr]     |
[INFO] [stderr] 336 |                 let mut masked_rn: u8 = (rn) & (self.opcode & 0x0FF) as u8;
[INFO] [stderr]     |                     ----^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `"docker" "inspect" "29ea2a2f8bcc548401ce4973e0c017063add325f03b8d519feeafba96679a66c"`
[INFO] running `"docker" "rm" "-f" "29ea2a2f8bcc548401ce4973e0c017063add325f03b8d519feeafba96679a66c"`
[INFO] [stdout] 29ea2a2f8bcc548401ce4973e0c017063add325f03b8d519feeafba96679a66c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianPomales/rust_chip8_emu:/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" "test" "--frozen"`
[INFO] [stdout] 2c3871e8defb5e9e134325e3e6f2c14f73f62a8b7682526e1fb93e80fcd33b2d
[INFO] running `"docker" "start" "-a" "2c3871e8defb5e9e134325e3e6f2c14f73f62a8b7682526e1fb93e80fcd33b2d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chip8_emu-7c892e1f62607783
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "2c3871e8defb5e9e134325e3e6f2c14f73f62a8b7682526e1fb93e80fcd33b2d"`
[INFO] running `"docker" "rm" "-f" "2c3871e8defb5e9e134325e3e6f2c14f73f62a8b7682526e1fb93e80fcd33b2d"`
[INFO] [stdout] 2c3871e8defb5e9e134325e3e6f2c14f73f62a8b7682526e1fb93e80fcd33b2d