[INFO] updating cached repository drgmr/chip8
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/drgmr/chip8
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/drgmr/chip8" "work/ex/beta-1.38-1/sources/1.37.0/gh/drgmr/chip8"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/drgmr/chip8'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/drgmr/chip8" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/drgmr/chip8"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/drgmr/chip8'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 86a3a8078eac5240460033d68a052e454ba97004
[INFO] sha for GitHub repo drgmr/chip8: 86a3a8078eac5240460033d68a052e454ba97004
[INFO] validating manifest of drgmr/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 drgmr/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 drgmr/chip8
[INFO] finished frobbing drgmr/chip8
[INFO] frobbed toml for drgmr/chip8 written to work/ex/beta-1.38-1/sources/1.37.0/gh/drgmr/chip8/Cargo.toml
[INFO] started frobbing drgmr/chip8
[INFO] finished frobbing drgmr/chip8
[INFO] frobbed toml for drgmr/chip8 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/drgmr/chip8/Cargo.toml
[INFO] crate drgmr/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 drgmr/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-2/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/drgmr/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] 804ac19079a6850a57194ff08361583a0227078f4f220bab719120dd4bf257d9
[INFO] running `"docker" "start" "-a" "804ac19079a6850a57194ff08361583a0227078f4f220bab719120dd4bf257d9"`
[INFO] [stderr]    Compiling chip8 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `cpu`
[INFO] [stderr]   --> src/cpu.rs:52:14
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn load_game(cpu: &mut CPU) {}
[INFO] [stderr]    |              ^^^ help: consider prefixing with an underscore: `_cpu`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `short_constant`
[INFO] [stderr]   --> src/instruction.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let short_constant = source & 0x000F;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_short_constant`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fetch_opcode`
[INFO] [stderr]   --> src/cpu.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn fetch_opcode(&mut self) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "804ac19079a6850a57194ff08361583a0227078f4f220bab719120dd4bf257d9"`
[INFO] running `"docker" "rm" "-f" "804ac19079a6850a57194ff08361583a0227078f4f220bab719120dd4bf257d9"`
[INFO] [stdout] 804ac19079a6850a57194ff08361583a0227078f4f220bab719120dd4bf257d9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/drgmr/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 82ef4dc962a7e45c1725bf81b5f686fbb7681f111884d8b3ac8d4eb9805cde51
[INFO] running `"docker" "start" "-a" "82ef4dc962a7e45c1725bf81b5f686fbb7681f111884d8b3ac8d4eb9805cde51"`
[INFO] [stderr]    Compiling chip8 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `cpu`
[INFO] [stderr]   --> src/cpu.rs:52:14
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn load_game(cpu: &mut CPU) {}
[INFO] [stderr]    |              ^^^ help: consider prefixing with an underscore: `_cpu`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `short_constant`
[INFO] [stderr]   --> src/instruction.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let short_constant = source & 0x000F;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_short_constant`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fetch_opcode`
[INFO] [stderr]   --> src/cpu.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn fetch_opcode(&mut self) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `"docker" "inspect" "82ef4dc962a7e45c1725bf81b5f686fbb7681f111884d8b3ac8d4eb9805cde51"`
[INFO] running `"docker" "rm" "-f" "82ef4dc962a7e45c1725bf81b5f686fbb7681f111884d8b3ac8d4eb9805cde51"`
[INFO] [stdout] 82ef4dc962a7e45c1725bf81b5f686fbb7681f111884d8b3ac8d4eb9805cde51
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/drgmr/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" "test" "--frozen"`
[INFO] [stdout] 91673da5e362102866f1bdeae8aca9752fe29a8047d63236deac47322c195594
[INFO] running `"docker" "start" "-a" "91673da5e362102866f1bdeae8aca9752fe29a8047d63236deac47322c195594"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chip8-408fa0ab7d439f9b
[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" "91673da5e362102866f1bdeae8aca9752fe29a8047d63236deac47322c195594"`
[INFO] running `"docker" "rm" "-f" "91673da5e362102866f1bdeae8aca9752fe29a8047d63236deac47322c195594"`
[INFO] [stdout] 91673da5e362102866f1bdeae8aca9752fe29a8047d63236deac47322c195594