[INFO] cloning repository https://github.com/mattrberry/chip8.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattrberry/chip8.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattrberry%2Fchip8.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattrberry%2Fchip8.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ebbacae0f5e6a32d981fd9f2ce9f3bfb22dc189d
[INFO] checking mattrberry/chip8.rs against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattrberry%2Fchip8.rs" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mattrberry/chip8.rs on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mattrberry/chip8.rs
[INFO] finished tweaking git repo https://github.com/mattrberry/chip8.rs
[INFO] tweaked toml for git repo https://github.com/mattrberry/chip8.rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/mattrberry/chip8.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sdl2-sys v0.34.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 59ededac0bfe44e532051fd4abcaf60dd782afd37df78eca01c2e51bc0853cd6
[INFO] running `Command { std: "docker" "start" "-a" "59ededac0bfe44e532051fd4abcaf60dd782afd37df78eca01c2e51bc0853cd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59ededac0bfe44e532051fd4abcaf60dd782afd37df78eca01c2e51bc0853cd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59ededac0bfe44e532051fd4abcaf60dd782afd37df78eca01c2e51bc0853cd6", kill_on_drop: false }`
[INFO] [stdout] 59ededac0bfe44e532051fd4abcaf60dd782afd37df78eca01c2e51bc0853cd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97a2ff6fdca1531ee0978198aba849039f39b42ad25665fb66c41a9d2560e2b7
[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" "97a2ff6fdca1531ee0978198aba849039f39b42ad25665fb66c41a9d2560e2b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling version-compare v0.0.10
[INFO] [stderr]    Compiling sdl2 v0.34.3
[INFO] [stderr]     Checking bytemuck v1.4.0
[INFO] [stderr]    Compiling sdl2-sys v0.34.2
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/cpu.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout] 169 |             (0xF, x @ _, 0x0, 0x7) => (), // load delay timer to v[x]
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/cpu.rs:170:19
[INFO] [stdout]     |
[INFO] [stdout] 170 |             (0xF, x @ _, 0x0, 0xA) => (), // wait for keypress then load to v[x]
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/cpu.rs:171:19
[INFO] [stdout]     |
[INFO] [stdout] 171 |             (0xF, x @ _, 0x1, 0x5) => (), // store v[x] to delay timer
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/cpu.rs:172:19
[INFO] [stdout]     |
[INFO] [stdout] 172 |             (0xF, x @ _, 0x1, 0x8) => (), // store v[x] to sound timer
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/cpu.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout] 169 |             (0xF, x @ _, 0x0, 0x7) => (), // load delay timer to v[x]
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/cpu.rs:170:19
[INFO] [stdout]     |
[INFO] [stdout] 170 |             (0xF, x @ _, 0x0, 0xA) => (), // wait for keypress then load to v[x]
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/cpu.rs:171:19
[INFO] [stdout]     |
[INFO] [stdout] 171 |             (0xF, x @ _, 0x1, 0x5) => (), // store v[x] to delay timer
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/cpu.rs:172:19
[INFO] [stdout]     |
[INFO] [stdout] 172 |             (0xF, x @ _, 0x1, 0x8) => (), // store v[x] to sound timer
[INFO] [stdout]     |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.00s
[INFO] running `Command { std: "docker" "inspect" "97a2ff6fdca1531ee0978198aba849039f39b42ad25665fb66c41a9d2560e2b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97a2ff6fdca1531ee0978198aba849039f39b42ad25665fb66c41a9d2560e2b7", kill_on_drop: false }`
[INFO] [stdout] 97a2ff6fdca1531ee0978198aba849039f39b42ad25665fb66c41a9d2560e2b7