[INFO] cloning repository https://github.com/andbass/Chip8
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andbass/Chip8" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandbass%2FChip8", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandbass%2FChip8'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aac532fef25ea6a61a6ea54eaedd6237de6235b7
[INFO] testing andbass/Chip8 against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandbass%2FChip8" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/andbass/Chip8 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/andbass/Chip8
[INFO] finished tweaking git repo https://github.com/andbass/Chip8
[INFO] tweaked toml for git repo https://github.com/andbass/Chip8 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/andbass/Chip8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6abf2e77d8dd60c06201eea8cd208a1bc870c29f16d3962f4323ad6f4056e2c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b6abf2e77d8dd60c06201eea8cd208a1bc870c29f16d3962f4323ad6f4056e2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6abf2e77d8dd60c06201eea8cd208a1bc870c29f16d3962f4323ad6f4056e2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6abf2e77d8dd60c06201eea8cd208a1bc870c29f16d3962f4323ad6f4056e2c", kill_on_drop: false }`
[INFO] [stdout] b6abf2e77d8dd60c06201eea8cd208a1bc870c29f16d3962f4323ad6f4056e2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb6cdc9f40528472f717e46cdcf5fe6c126448d9e54ca14c0a0d7fe64a26753c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fb6cdc9f40528472f717e46cdcf5fe6c126448d9e54ca14c0a0d7fe64a26753c", kill_on_drop: false }`
[INFO] [stderr]    Compiling chip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling sdl2-sys v0.31.0 (https://github.com/Rust-SDL2/rust-sdl2#43ca1ba0)
[INFO] [stderr]    Compiling rand v0.4.1
[INFO] [stderr]    Compiling sdl2 v0.31.0 (https://github.com/Rust-SDL2/rust-sdl2#43ca1ba0)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |         try!(program.read_to_end(&mut bytes));
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |             try!(self.execute_opcode(opcode, keys));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:386:9
[INFO] [stdout]     |
[INFO] [stdout] 386 |         try!(writeln!(fmt, "Program Counter: 0x{:X} ({})", self.pc, self.pc));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:387:9
[INFO] [stdout]     |
[INFO] [stdout] 387 |         try!(writeln!(fmt, "Address Register: 0x{:X} ({})", self.address_reg, self.address_reg));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:388:9
[INFO] [stdout]     |
[INFO] [stdout] 388 |         try!(writeln!(fmt, "Stack: {:?}", self.stack));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:389:9
[INFO] [stdout]     |
[INFO] [stdout] 389 |         try!(writeln!(fmt, "Delay Timer: {}", self.delay_timer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:390:9
[INFO] [stdout]     |
[INFO] [stdout] 390 |         try!(writeln!(fmt, "Sound Timer: {}", self.sound_timer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sdl2`
[INFO] [stdout]  --> src/frontend/sdl.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use sdl2;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `WindowPos`, `Window`
[INFO] [stdout]  --> src/frontend/sdl.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use sdl2::video::{Window, WindowPos};
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sdl2::keyboard`
[INFO] [stdout]  --> src/frontend/sdl.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use sdl2::keyboard;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/frontend/sdl.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         let mut drawer = &mut self.renderer;
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/frontend/sdl.rs:53:21
[INFO] [stdout]    |
[INFO] [stdout] 53 | /                     drawer.fill_rect(Rect::new(
[INFO] [stdout] 54 | |                         x as i32 * GRID_SIZE,
[INFO] [stdout] 55 | |                         y as i32 * GRID_SIZE,
[INFO] [stdout] 56 | |
[INFO] [stdout] 57 | |                         GRID_SIZE as u32,
[INFO] [stdout] 58 | |                         GRID_SIZE as u32,
[INFO] [stdout] 59 | |                     ));
[INFO] [stdout]    | |_______________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.05s
[INFO] running `Command { std: "docker" "inspect" "fb6cdc9f40528472f717e46cdcf5fe6c126448d9e54ca14c0a0d7fe64a26753c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb6cdc9f40528472f717e46cdcf5fe6c126448d9e54ca14c0a0d7fe64a26753c", kill_on_drop: false }`
[INFO] [stdout] fb6cdc9f40528472f717e46cdcf5fe6c126448d9e54ca14c0a0d7fe64a26753c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91f9c57ce9e1bd7b52f14d7ded0b4e790d62bff1111a449259ab5a5c22632545
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "91f9c57ce9e1bd7b52f14d7ded0b4e790d62bff1111a449259ab5a5c22632545", kill_on_drop: false }`
[INFO] [stderr]    Compiling chip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:130:9
[INFO] [stdout]     |
[INFO] [stdout] 130 |         try!(program.read_to_end(&mut bytes));
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |             try!(self.execute_opcode(opcode, keys));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:386:9
[INFO] [stdout]     |
[INFO] [stdout] 386 |         try!(writeln!(fmt, "Program Counter: 0x{:X} ({})", self.pc, self.pc));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:387:9
[INFO] [stdout]     |
[INFO] [stdout] 387 |         try!(writeln!(fmt, "Address Register: 0x{:X} ({})", self.address_reg, self.address_reg));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:388:9
[INFO] [stdout]     |
[INFO] [stdout] 388 |         try!(writeln!(fmt, "Stack: {:?}", self.stack));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:389:9
[INFO] [stdout]     |
[INFO] [stdout] 389 |         try!(writeln!(fmt, "Delay Timer: {}", self.delay_timer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/machine.rs:390:9
[INFO] [stdout]     |
[INFO] [stdout] 390 |         try!(writeln!(fmt, "Sound Timer: {}", self.sound_timer));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sdl2`
[INFO] [stdout]  --> src/frontend/sdl.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use sdl2;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `WindowPos`, `Window`
[INFO] [stdout]  --> src/frontend/sdl.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use sdl2::video::{Window, WindowPos};
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sdl2::keyboard`
[INFO] [stdout]  --> src/frontend/sdl.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use sdl2::keyboard;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/frontend/sdl.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         let mut drawer = &mut self.renderer;
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/frontend/sdl.rs:53:21
[INFO] [stdout]    |
[INFO] [stdout] 53 | /                     drawer.fill_rect(Rect::new(
[INFO] [stdout] 54 | |                         x as i32 * GRID_SIZE,
[INFO] [stdout] 55 | |                         y as i32 * GRID_SIZE,
[INFO] [stdout] 56 | |
[INFO] [stdout] 57 | |                         GRID_SIZE as u32,
[INFO] [stdout] 58 | |                         GRID_SIZE as u32,
[INFO] [stdout] 59 | |                     ));
[INFO] [stdout]    | |_______________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "91f9c57ce9e1bd7b52f14d7ded0b4e790d62bff1111a449259ab5a5c22632545", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91f9c57ce9e1bd7b52f14d7ded0b4e790d62bff1111a449259ab5a5c22632545", kill_on_drop: false }`
[INFO] [stdout] 91f9c57ce9e1bd7b52f14d7ded0b4e790d62bff1111a449259ab5a5c22632545
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a6e9df6180ee201dbc89feaf230b3ab9aa66528096e1d60a3d0ec41a0f8231c1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a6e9df6180ee201dbc89feaf230b3ab9aa66528096e1d60a3d0ec41a0f8231c1", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/machine.rs:130:9
[INFO] [stderr]     |
[INFO] [stderr] 130 |         try!(program.read_to_end(&mut bytes));
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/machine.rs:161:13
[INFO] [stderr]     |
[INFO] [stderr] 161 |             try!(self.execute_opcode(opcode, keys));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/machine.rs:386:9
[INFO] [stderr]     |
[INFO] [stderr] 386 |         try!(writeln!(fmt, "Program Counter: 0x{:X} ({})", self.pc, self.pc));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/machine.rs:387:9
[INFO] [stderr]     |
[INFO] [stderr] 387 |         try!(writeln!(fmt, "Address Register: 0x{:X} ({})", self.address_reg, self.address_reg));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/machine.rs:388:9
[INFO] [stderr]     |
[INFO] [stderr] 388 |         try!(writeln!(fmt, "Stack: {:?}", self.stack));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/machine.rs:389:9
[INFO] [stderr]     |
[INFO] [stderr] 389 |         try!(writeln!(fmt, "Delay Timer: {}", self.delay_timer));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/machine.rs:390:9
[INFO] [stderr]     |
[INFO] [stderr] 390 |         try!(writeln!(fmt, "Sound Timer: {}", self.sound_timer));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `sdl2`
[INFO] [stderr]  --> src/frontend/sdl.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use sdl2;
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `WindowPos`, `Window`
[INFO] [stderr]  --> src/frontend/sdl.rs:6:19
[INFO] [stderr]   |
[INFO] [stderr] 6 | use sdl2::video::{Window, WindowPos};
[INFO] [stderr]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `sdl2::keyboard`
[INFO] [stderr]  --> src/frontend/sdl.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use sdl2::keyboard;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/frontend/sdl.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |         let mut drawer = &mut self.renderer;
[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: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/frontend/sdl.rs:53:21
[INFO] [stderr]    |
[INFO] [stderr] 53 | /                     drawer.fill_rect(Rect::new(
[INFO] [stderr] 54 | |                         x as i32 * GRID_SIZE,
[INFO] [stderr] 55 | |                         y as i32 * GRID_SIZE,
[INFO] [stderr] 56 | |
[INFO] [stderr] 57 | |                         GRID_SIZE as u32,
[INFO] [stderr] 58 | |                         GRID_SIZE as u32,
[INFO] [stderr] 59 | |                     ));
[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: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/chip8-575baee827483cf1
[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 `Command { std: "docker" "inspect" "a6e9df6180ee201dbc89feaf230b3ab9aa66528096e1d60a3d0ec41a0f8231c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6e9df6180ee201dbc89feaf230b3ab9aa66528096e1d60a3d0ec41a0f8231c1", kill_on_drop: false }`
[INFO] [stdout] a6e9df6180ee201dbc89feaf230b3ab9aa66528096e1d60a3d0ec41a0f8231c1
