[INFO] cloning repository https://github.com/shawngiroux/rusty-chip8
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shawngiroux/rusty-chip8" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshawngiroux%2Frusty-chip8", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshawngiroux%2Frusty-chip8'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 936f1c63f6771ef5de1e638f6c0a09647ed9ebb5
[INFO] testing shawngiroux/rusty-chip8 against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshawngiroux%2Frusty-chip8" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shawngiroux/rusty-chip8 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shawngiroux/rusty-chip8
[INFO] finished tweaking git repo https://github.com/shawngiroux/rusty-chip8
[INFO] tweaked toml for git repo https://github.com/shawngiroux/rusty-chip8 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/shawngiroux/rusty-chip8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dde6dde4840a2b209ea64c0e86f08474b7a7c37e4552980e4f4029fdd939d54c
[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" "dde6dde4840a2b209ea64c0e86f08474b7a7c37e4552980e4f4029fdd939d54c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dde6dde4840a2b209ea64c0e86f08474b7a7c37e4552980e4f4029fdd939d54c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dde6dde4840a2b209ea64c0e86f08474b7a7c37e4552980e4f4029fdd939d54c", kill_on_drop: false }`
[INFO] [stdout] dde6dde4840a2b209ea64c0e86f08474b7a7c37e4552980e4f4029fdd939d54c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbec28c50c748b26c6aa9ccd85779941acc88b2f7f26d3af0dccbbab4ed90e03
[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" "bbec28c50c748b26c6aa9ccd85779941acc88b2f7f26d3af0dccbbab4ed90e03", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-chip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `old_V`
[INFO] [stdout]    --> src/main.rs:148:33
[INFO] [stdout]     |
[INFO] [stdout] 148 | ...                   let old_V = self.V[V_index];
[INFO] [stdout]     |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_old_V`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `V` should have a snake case name
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     V: [u16; 16],
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `I` should have a snake case name
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     I: u16,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         f.read_to_end(&mut buffer);
[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: variable `VX` should have a snake case name
[INFO] [stdout]   --> src/main.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]   --> src/main.rs:91:21
[INFO] [stdout]    |
[INFO] [stdout] 91 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `NN` should have a snake case name
[INFO] [stdout]   --> src/main.rs:92:21
[INFO] [stdout]    |
[INFO] [stdout] 92 |                 let NN = self.opcode & 0x00FF;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case: `nn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]   --> src/main.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `NN` should have a snake case name
[INFO] [stdout]   --> src/main.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 let NN = self.opcode & 0x00FF;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case: `nn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]    --> src/main.rs:118:29
[INFO] [stdout]     |
[INFO] [stdout] 118 |                         let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]    --> src/main.rs:127:29
[INFO] [stdout]     |
[INFO] [stdout] 127 |                         let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]    --> src/main.rs:144:29
[INFO] [stdout]     |
[INFO] [stdout] 144 |                         let VX = (self.opcode & 0x0F00) >> 8;
[INFO] [stdout]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `V_index` should have a snake case name
[INFO] [stdout]    --> src/main.rs:147:33
[INFO] [stdout]     |
[INFO] [stdout] 147 | ...                   let V_index = x as usize;
[INFO] [stdout]     |                           ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `v_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `old_V` should have a snake case name
[INFO] [stdout]    --> src/main.rs:148:33
[INFO] [stdout]     |
[INFO] [stdout] 148 | ...                   let old_V = self.V[V_index];
[INFO] [stdout]     |                           ^^^^^ help: convert the identifier to snake case (notice the capitalization): `old_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "bbec28c50c748b26c6aa9ccd85779941acc88b2f7f26d3af0dccbbab4ed90e03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbec28c50c748b26c6aa9ccd85779941acc88b2f7f26d3af0dccbbab4ed90e03", kill_on_drop: false }`
[INFO] [stdout] bbec28c50c748b26c6aa9ccd85779941acc88b2f7f26d3af0dccbbab4ed90e03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 871e6e93766ee469c88176adb392d710276d31428c194ff85ad34c2465c56187
[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" "871e6e93766ee469c88176adb392d710276d31428c194ff85ad34c2465c56187", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-chip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `old_V`
[INFO] [stdout]    --> src/main.rs:148:33
[INFO] [stdout]     |
[INFO] [stdout] 148 | ...                   let old_V = self.V[V_index];
[INFO] [stdout]     |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_old_V`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `V` should have a snake case name
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     V: [u16; 16],
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `I` should have a snake case name
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     I: u16,
[INFO] [stdout]    |     ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         f.read_to_end(&mut buffer);
[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: variable `VX` should have a snake case name
[INFO] [stdout]   --> src/main.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]   --> src/main.rs:91:21
[INFO] [stdout]    |
[INFO] [stdout] 91 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `NN` should have a snake case name
[INFO] [stdout]   --> src/main.rs:92:21
[INFO] [stdout]    |
[INFO] [stdout] 92 |                 let NN = self.opcode & 0x00FF;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case: `nn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]   --> src/main.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `NN` should have a snake case name
[INFO] [stdout]   --> src/main.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 let NN = self.opcode & 0x00FF;
[INFO] [stdout]    |                     ^^ help: convert the identifier to snake case: `nn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]    --> src/main.rs:118:29
[INFO] [stdout]     |
[INFO] [stdout] 118 |                         let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]    --> src/main.rs:127:29
[INFO] [stdout]     |
[INFO] [stdout] 127 |                         let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stdout]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VX` should have a snake case name
[INFO] [stdout]    --> src/main.rs:144:29
[INFO] [stdout]     |
[INFO] [stdout] 144 |                         let VX = (self.opcode & 0x0F00) >> 8;
[INFO] [stdout]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `V_index` should have a snake case name
[INFO] [stdout]    --> src/main.rs:147:33
[INFO] [stdout]     |
[INFO] [stdout] 147 | ...                   let V_index = x as usize;
[INFO] [stdout]     |                           ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `v_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `old_V` should have a snake case name
[INFO] [stdout]    --> src/main.rs:148:33
[INFO] [stdout]     |
[INFO] [stdout] 148 | ...                   let old_V = self.V[V_index];
[INFO] [stdout]     |                           ^^^^^ help: convert the identifier to snake case (notice the capitalization): `old_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "871e6e93766ee469c88176adb392d710276d31428c194ff85ad34c2465c56187", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "871e6e93766ee469c88176adb392d710276d31428c194ff85ad34c2465c56187", kill_on_drop: false }`
[INFO] [stdout] 871e6e93766ee469c88176adb392d710276d31428c194ff85ad34c2465c56187
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a269a4d23cb13229780b2c43b61a522b9d448c22a353ff71125541479c2ef1d1
[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" "a269a4d23cb13229780b2c43b61a522b9d448c22a353ff71125541479c2ef1d1", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `old_V`
[INFO] [stderr]    --> src/main.rs:148:33
[INFO] [stderr]     |
[INFO] [stderr] 148 | ...                   let old_V = self.V[V_index];
[INFO] [stderr]     |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_old_V`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `V` should have a snake case name
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     V: [u16; 16],
[INFO] [stderr]    |     ^ help: convert the identifier to snake case (notice the capitalization): `v`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `I` should have a snake case name
[INFO] [stderr]   --> src/main.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     I: u16,
[INFO] [stderr]    |     ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         f.read_to_end(&mut buffer);
[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: variable `VX` should have a snake case name
[INFO] [stderr]   --> src/main.rs:82:21
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stderr]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `VX` should have a snake case name
[INFO] [stderr]   --> src/main.rs:91:21
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stderr]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `NN` should have a snake case name
[INFO] [stderr]   --> src/main.rs:92:21
[INFO] [stderr]    |
[INFO] [stderr] 92 |                 let NN = self.opcode & 0x00FF;
[INFO] [stderr]    |                     ^^ help: convert the identifier to snake case: `nn`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `VX` should have a snake case name
[INFO] [stderr]   --> src/main.rs:98:21
[INFO] [stderr]    |
[INFO] [stderr] 98 |                 let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stderr]    |                     ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `NN` should have a snake case name
[INFO] [stderr]   --> src/main.rs:99:21
[INFO] [stderr]    |
[INFO] [stderr] 99 |                 let NN = self.opcode & 0x00FF;
[INFO] [stderr]    |                     ^^ help: convert the identifier to snake case: `nn`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `VX` should have a snake case name
[INFO] [stderr]    --> src/main.rs:118:29
[INFO] [stderr]     |
[INFO] [stderr] 118 |                         let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stderr]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `VX` should have a snake case name
[INFO] [stderr]    --> src/main.rs:127:29
[INFO] [stderr]     |
[INFO] [stderr] 127 |                         let VX = ((self.opcode & 0x0F00) >> 8) as usize;
[INFO] [stderr]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `VX` should have a snake case name
[INFO] [stderr]    --> src/main.rs:144:29
[INFO] [stderr]     |
[INFO] [stderr] 144 |                         let VX = (self.opcode & 0x0F00) >> 8;
[INFO] [stderr]     |                             ^^ help: convert the identifier to snake case (notice the capitalization): `vx`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `V_index` should have a snake case name
[INFO] [stderr]    --> src/main.rs:147:33
[INFO] [stderr]     |
[INFO] [stderr] 147 | ...                   let V_index = x as usize;
[INFO] [stderr]     |                           ^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `v_index`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `old_V` should have a snake case name
[INFO] [stderr]    --> src/main.rs:148:33
[INFO] [stderr]     |
[INFO] [stderr] 148 | ...                   let old_V = self.V[V_index];
[INFO] [stderr]     |                           ^^^^^ help: convert the identifier to snake case (notice the capitalization): `old_v`
[INFO] [stderr] 
[INFO] [stderr] warning: 14 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rusty_chip8-038a2a434bb2b4de
[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 `Command { std: "docker" "inspect" "a269a4d23cb13229780b2c43b61a522b9d448c22a353ff71125541479c2ef1d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a269a4d23cb13229780b2c43b61a522b9d448c22a353ff71125541479c2ef1d1", kill_on_drop: false }`
[INFO] [stdout] a269a4d23cb13229780b2c43b61a522b9d448c22a353ff71125541479c2ef1d1