[INFO] updating cached repository Wilfred/gameboy_emulator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Wilfred/gameboy_emulator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Wilfred/gameboy_emulator" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Wilfred/gameboy_emulator"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Wilfred/gameboy_emulator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Wilfred/gameboy_emulator" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Wilfred/gameboy_emulator"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Wilfred/gameboy_emulator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] eb31f039427370ca7a2c6547acab8a4d8cd3c732
[INFO] sha for GitHub repo Wilfred/gameboy_emulator: eb31f039427370ca7a2c6547acab8a4d8cd3c732
[INFO] validating manifest of Wilfred/gameboy_emulator on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Wilfred/gameboy_emulator on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Wilfred/gameboy_emulator
[INFO] finished frobbing Wilfred/gameboy_emulator
[INFO] frobbed toml for Wilfred/gameboy_emulator written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Wilfred/gameboy_emulator/Cargo.toml
[INFO] started frobbing Wilfred/gameboy_emulator
[INFO] finished frobbing Wilfred/gameboy_emulator
[INFO] frobbed toml for Wilfred/gameboy_emulator written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Wilfred/gameboy_emulator/Cargo.toml
[INFO] crate Wilfred/gameboy_emulator already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Wilfred/gameboy_emulator against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-1/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Wilfred/gameboy_emulator:/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0ae2ce3eff258563dd94bf752154798e144bc93f38a2847eae6a1f75517a679c
[INFO] running `"docker" "start" "-a" "0ae2ce3eff258563dd94bf752154798e144bc93f38a2847eae6a1f75517a679c"`
[INFO] [stderr]     Checking gameboy_emulator v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/instructions.rs:380:17
[INFO] [stderr]     |
[INFO] [stderr] 380 |             let mut reg = register8(cpu, target);
[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] warning: field is never used: `memory`
[INFO] [stderr]   --> src/instructions.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     memory: [u8; 65536],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/instructions.rs:380:17
[INFO] [stderr]     |
[INFO] [stderr] 380 |             let mut reg = register8(cpu, target);
[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] warning: field is never used: `memory`
[INFO] [stderr]   --> src/instructions.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     memory: [u8; 65536],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/instructions.rs:450:5
[INFO] [stderr]     |
[INFO] [stderr] 450 |     step(&mut cpu, Nop);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/instructions.rs:460:5
[INFO] [stderr]     |
[INFO] [stderr] 460 |     step(&mut cpu, Increment(Operand8::Register(A)));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/instructions.rs:473:5
[INFO] [stderr]     |
[INFO] [stderr] 473 |     step(&mut cpu, Increment(Operand8::Register(A)));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/instructions.rs:530:5
[INFO] [stderr]     |
[INFO] [stderr] 530 |     step(&mut cpu, decode(&bytes, 0).unwrap());
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "0ae2ce3eff258563dd94bf752154798e144bc93f38a2847eae6a1f75517a679c"`
[INFO] running `"docker" "rm" "-f" "0ae2ce3eff258563dd94bf752154798e144bc93f38a2847eae6a1f75517a679c"`
[INFO] [stdout] 0ae2ce3eff258563dd94bf752154798e144bc93f38a2847eae6a1f75517a679c