[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/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/drgmr/chip8"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/drgmr/chip8'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/drgmr/chip8" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/drgmr/chip8"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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 master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of drgmr/chip8 on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "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/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/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/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking drgmr/chip8 against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-4/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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=forbid" "-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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2c14a50aabbd782a6f69d7feb32f5c08d29bc4e56a6039f51dbbb51162fe1fa8
[INFO] running `"docker" "start" "-a" "2c14a50aabbd782a6f69d7feb32f5c08d29bc4e56a6039f51dbbb51162fe1fa8"`
[INFO] [stderr]     Checking 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] 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 1.10s
[INFO] running `"docker" "inspect" "2c14a50aabbd782a6f69d7feb32f5c08d29bc4e56a6039f51dbbb51162fe1fa8"`
[INFO] running `"docker" "rm" "-f" "2c14a50aabbd782a6f69d7feb32f5c08d29bc4e56a6039f51dbbb51162fe1fa8"`
[INFO] [stdout] 2c14a50aabbd782a6f69d7feb32f5c08d29bc4e56a6039f51dbbb51162fe1fa8