[INFO] updating cached repository https://github.com/foxmk/rustboy
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 32f594b0873f8196b9cc4174924de9700ef9b3bb
[INFO] checking foxmk/rustboy against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffoxmk%2Frustboy" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/foxmk/rustboy on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/foxmk/rustboy
[INFO] finished tweaking git repo https://github.com/foxmk/rustboy
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[INFO] crate git repo https://github.com/foxmk/rustboy already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7949e8518e6468b992708ac0d30c9084c17342f2147e2a240abcd81e534ad618
[INFO] running `"docker" "start" "-a" "7949e8518e6468b992708ac0d30c9084c17342f2147e2a240abcd81e534ad618"`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling x11-dl v2.14.0
[INFO] [stderr]    Compiling minifb v0.11.2
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking vm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/ppu.rs:304:28
[INFO] [stderr]     |
[INFO] [stderr] 304 |             PPU::VRAM_START...PPU::VRAM_END => {
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/ppu.rs:313:27
[INFO] [stderr]     |
[INFO] [stderr] 313 |             PPU::OAM_START...PPU::OAM_END => {
[INFO] [stderr]     |                           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/ppu.rs:340:28
[INFO] [stderr]     |
[INFO] [stderr] 340 |             PPU::VRAM_START...PPU::VRAM_END => {
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/ppu.rs:349:27
[INFO] [stderr]     |
[INFO] [stderr] 349 |             PPU::OAM_START...PPU::OAM_END => {
[INFO] [stderr]     |                           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/ppu.rs:304:28
[INFO] [stderr]     |
[INFO] [stderr] 304 |             PPU::VRAM_START...PPU::VRAM_END => {
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/ppu.rs:313:27
[INFO] [stderr]     |
[INFO] [stderr] 313 |             PPU::OAM_START...PPU::OAM_END => {
[INFO] [stderr]     |                           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/ppu.rs:340:28
[INFO] [stderr]     |
[INFO] [stderr] 340 |             PPU::VRAM_START...PPU::VRAM_END => {
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/ppu.rs:349:27
[INFO] [stderr]     |
[INFO] [stderr] 349 |             PPU::OAM_START...PPU::OAM_END => {
[INFO] [stderr]     |                           ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     cpu.borrow_mut().step();
[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/main.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     ppu.borrow_mut().step();
[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/cpu.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 self.exec_op(post_op);
[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/cpu.rs:723:17
[INFO] [stderr]     |
[INFO] [stderr] 723 |                 byte.set_bit(0, value as usize);
[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/cpu.rs:728:17
[INFO] [stderr]     |
[INFO] [stderr] 728 |                 byte.set_bit(0, value as usize);
[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/cpu.rs:733:17
[INFO] [stderr]     |
[INFO] [stderr] 733 |                 byte.set_bit(0, value as usize);
[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/cpu.rs:738:17
[INFO] [stderr]     |
[INFO] [stderr] 738 |                 byte.set_bit(0, value as usize);
[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/ppu.rs:197:17
[INFO] [stderr]     |
[INFO] [stderr] 197 |                 self.stat.set_bit(PPU::MODE_TRANSFER, true as usize);
[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/ppu.rs:198:17
[INFO] [stderr]     |
[INFO] [stderr] 198 |                 self.stat.set_bit(PPU::MODE, false as usize);
[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/ppu.rs:202:17
[INFO] [stderr]     |
[INFO] [stderr] 202 |                 self.stat.set_bit(PPU::MODE_TRANSFER, true as usize);
[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/ppu.rs:203:17
[INFO] [stderr]     |
[INFO] [stderr] 203 |                 self.stat.set_bit(PPU::MODE, true as usize);
[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/ppu.rs:207:17
[INFO] [stderr]     |
[INFO] [stderr] 207 |                 self.stat.set_bit(PPU::MODE_TRANSFER, false as usize);
[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/ppu.rs:208:17
[INFO] [stderr]     |
[INFO] [stderr] 208 |                 self.stat.set_bit(PPU::MODE, false as usize);
[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/ppu.rs:212:17
[INFO] [stderr]     |
[INFO] [stderr] 212 |                 self.stat.set_bit(PPU::MODE_TRANSFER, false as usize);
[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/ppu.rs:213:17
[INFO] [stderr]     |
[INFO] [stderr] 213 |                 self.stat.set_bit(PPU::MODE, true as usize);
[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/ppu.rs:275:13
[INFO] [stderr]     |
[INFO] [stderr] 275 |             InterruptController::request(self.memory.borrow_mut(), Interrupt::LcdStat);
[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/interrupts.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 | /         match int {
[INFO] [stderr] 73 | |             Interrupt::VBlank => flags_to_save.set_bit(0, 1),
[INFO] [stderr] 74 | |             Interrupt::LcdStat => flags_to_save.set_bit(1, 1),
[INFO] [stderr] 75 | |             Interrupt::Timer => flags_to_save.set_bit(2, 1),
[INFO] [stderr] 76 | |             Interrupt::Serial => flags_to_save.set_bit(3, 1),
[INFO] [stderr] 77 | |             Interrupt::Joystick => flags_to_save.set_bit(4, 1),
[INFO] [stderr] 78 | |         };
[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/interrupts.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 | /         match int {
[INFO] [stderr] 87 | |             Interrupt::VBlank => flags_to_save.set_bit(0, 0),
[INFO] [stderr] 88 | |             Interrupt::LcdStat => flags_to_save.set_bit(1, 0),
[INFO] [stderr] 89 | |             Interrupt::Timer => flags_to_save.set_bit(2, 0),
[INFO] [stderr] 90 | |             Interrupt::Serial => flags_to_save.set_bit(3, 0),
[INFO] [stderr] 91 | |             Interrupt::Joystick => flags_to_save.set_bit(4, 0),
[INFO] [stderr] 92 | |         };
[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/main.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     cpu.borrow_mut().step();
[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/main.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     ppu.borrow_mut().step();
[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/cpu.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 self.exec_op(post_op);
[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/cpu.rs:723:17
[INFO] [stderr]     |
[INFO] [stderr] 723 |                 byte.set_bit(0, value as usize);
[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/cpu.rs:728:17
[INFO] [stderr]     |
[INFO] [stderr] 728 |                 byte.set_bit(0, value as usize);
[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/cpu.rs:733:17
[INFO] [stderr]     |
[INFO] [stderr] 733 |                 byte.set_bit(0, value as usize);
[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/cpu.rs:738:17
[INFO] [stderr]     |
[INFO] [stderr] 738 |                 byte.set_bit(0, value as usize);
[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/cpu.rs:775:9
[INFO] [stderr]     |
[INFO] [stderr] 775 |         cpu.step();
[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/memory.rs:201:9
[INFO] [stderr]     |
[INFO] [stderr] 201 |         space.write(0x0020, 0xFF);
[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/memory.rs:216:9
[INFO] [stderr]     |
[INFO] [stderr] 216 |         space.write(0x0020, 0xFF);
[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/memory.rs:220:9
[INFO] [stderr]     |
[INFO] [stderr] 220 |         space.write(0x0120, 0xFE);
[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/ppu.rs:197:17
[INFO] [stderr]     |
[INFO] [stderr] 197 |                 self.stat.set_bit(PPU::MODE_TRANSFER, true as usize);
[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/ppu.rs:198:17
[INFO] [stderr]     |
[INFO] [stderr] 198 |                 self.stat.set_bit(PPU::MODE, false as usize);
[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/ppu.rs:202:17
[INFO] [stderr]     |
[INFO] [stderr] 202 |                 self.stat.set_bit(PPU::MODE_TRANSFER, true as usize);
[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/ppu.rs:203:17
[INFO] [stderr]     |
[INFO] [stderr] 203 |                 self.stat.set_bit(PPU::MODE, true as usize);
[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/ppu.rs:207:17
[INFO] [stderr]     |
[INFO] [stderr] 207 |                 self.stat.set_bit(PPU::MODE_TRANSFER, false as usize);
[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/ppu.rs:208:17
[INFO] [stderr]     |
[INFO] [stderr] 208 |                 self.stat.set_bit(PPU::MODE, false as usize);
[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/ppu.rs:212:17
[INFO] [stderr]     |
[INFO] [stderr] 212 |                 self.stat.set_bit(PPU::MODE_TRANSFER, false as usize);
[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/ppu.rs:213:17
[INFO] [stderr]     |
[INFO] [stderr] 213 |                 self.stat.set_bit(PPU::MODE, true as usize);
[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/ppu.rs:275:13
[INFO] [stderr]     |
[INFO] [stderr] 275 |             InterruptController::request(self.memory.borrow_mut(), Interrupt::LcdStat);
[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/interrupts.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 | /         match int {
[INFO] [stderr] 73 | |             Interrupt::VBlank => flags_to_save.set_bit(0, 1),
[INFO] [stderr] 74 | |             Interrupt::LcdStat => flags_to_save.set_bit(1, 1),
[INFO] [stderr] 75 | |             Interrupt::Timer => flags_to_save.set_bit(2, 1),
[INFO] [stderr] 76 | |             Interrupt::Serial => flags_to_save.set_bit(3, 1),
[INFO] [stderr] 77 | |             Interrupt::Joystick => flags_to_save.set_bit(4, 1),
[INFO] [stderr] 78 | |         };
[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/interrupts.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 | /         match int {
[INFO] [stderr] 87 | |             Interrupt::VBlank => flags_to_save.set_bit(0, 0),
[INFO] [stderr] 88 | |             Interrupt::LcdStat => flags_to_save.set_bit(1, 0),
[INFO] [stderr] 89 | |             Interrupt::Timer => flags_to_save.set_bit(2, 0),
[INFO] [stderr] 90 | |             Interrupt::Serial => flags_to_save.set_bit(3, 0),
[INFO] [stderr] 91 | |             Interrupt::Joystick => flags_to_save.set_bit(4, 0),
[INFO] [stderr] 92 | |         };
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 22 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 26 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.90s
[INFO] running `"docker" "inspect" "7949e8518e6468b992708ac0d30c9084c17342f2147e2a240abcd81e534ad618"`
[INFO] running `"docker" "rm" "-f" "7949e8518e6468b992708ac0d30c9084c17342f2147e2a240abcd81e534ad618"`
[INFO] [stdout] 7949e8518e6468b992708ac0d30c9084c17342f2147e2a240abcd81e534ad618