[INFO] cloning repository https://github.com/cadecolvin/chip8-emu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cadecolvin/chip8-emu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcadecolvin%2Fchip8-emu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcadecolvin%2Fchip8-emu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3c1bcfb61d1ad2231286798caaca9ed67d0a1e64
[INFO] checking cadecolvin/chip8-emu against try#3d9fdbff4f377de96b3a51174e7a64086bee9a5c for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcadecolvin%2Fchip8-emu" "/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/cadecolvin/chip8-emu on toolchain 3d9fdbff4f377de96b3a51174e7a64086bee9a5c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cadecolvin/chip8-emu
[INFO] finished tweaking git repo https://github.com/cadecolvin/chip8-emu
[INFO] tweaked toml for git repo https://github.com/cadecolvin/chip8-emu written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/cadecolvin/chip8-emu already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "fetch" "--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-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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 367ab76f19c012f54c4fc5c9f78d026f46b783d8c0fe2c9718d2e9b817dee2a5
[INFO] running `Command { std: "docker" "start" "-a" "367ab76f19c012f54c4fc5c9f78d026f46b783d8c0fe2c9718d2e9b817dee2a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "367ab76f19c012f54c4fc5c9f78d026f46b783d8c0fe2c9718d2e9b817dee2a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "367ab76f19c012f54c4fc5c9f78d026f46b783d8c0fe2c9718d2e9b817dee2a5", kill_on_drop: false }`
[INFO] [stdout] 367ab76f19c012f54c4fc5c9f78d026f46b783d8c0fe2c9718d2e9b817dee2a5
[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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3d9fdbff4f377de96b3a51174e7a64086bee9a5c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7980786efcd0396b4f3287dc9d82bb32233a4cdbdeef2f777b23e1e9bf04bc12
[INFO] running `Command { std: "docker" "start" "-a" "7980786efcd0396b4f3287dc9d82bb32233a4cdbdeef2f777b23e1e9bf04bc12", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking chip8-emu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `chip8`
[INFO] [stdout]  --> src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let chip8 = Chip8::new();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_chip8`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chip8`
[INFO] [stdout]  --> src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let chip8 = Chip8::new();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_chip8`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `pixel_flipped` is assigned to, but never used
[INFO] [stdout]    --> src/chip8.rs:140:25
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 let mut pixel_flipped = false;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_pixel_flipped` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `pixel_flipped` is assigned to, but never used
[INFO] [stdout]    --> src/chip8.rs:140:25
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 let mut pixel_flipped = false;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_pixel_flipped` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pixel_flipped` is never read
[INFO] [stdout]    --> src/chip8.rs:157:29
[INFO] [stdout]     |
[INFO] [stdout] 157 | ...                   pixel_flipped = true;
[INFO] [stdout]     |                       ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pixel_flipped` is never read
[INFO] [stdout]    --> src/chip8.rs:157:29
[INFO] [stdout]     |
[INFO] [stdout] 157 | ...                   pixel_flipped = true;
[INFO] [stdout]     |                       ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/chip8.rs:139:21
[INFO] [stdout]     |
[INFO] [stdout] 139 |                 let mut sprite_idx = self.addr_register;
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/chip8.rs:139:21
[INFO] [stdout]     |
[INFO] [stdout] 139 |                 let mut sprite_idx = self.addr_register;
[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: associated function is never used: `execute_cycle`
[INFO] [stdout]   --> src/chip8.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn execute_cycle(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_word`
[INFO] [stdout]   --> src/chip8.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn read_word(&self) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `execute_cycle`
[INFO] [stdout]   --> src/chip8.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn execute_cycle(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `process_opcode`
[INFO] [stdout]   --> src/chip8.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn process_opcode(&mut self, opcode: u16) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_word`
[INFO] [stdout]   --> src/chip8.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn read_word(&self) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `process_opcode`
[INFO] [stdout]   --> src/chip8.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn process_opcode(&mut self, opcode: u16) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.51s
[INFO] running `Command { std: "docker" "inspect" "7980786efcd0396b4f3287dc9d82bb32233a4cdbdeef2f777b23e1e9bf04bc12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7980786efcd0396b4f3287dc9d82bb32233a4cdbdeef2f777b23e1e9bf04bc12", kill_on_drop: false }`
[INFO] [stdout] 7980786efcd0396b4f3287dc9d82bb32233a4cdbdeef2f777b23e1e9bf04bc12