[INFO] updating cached repository 2bdkid/chip8-emulator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/2bdkid/chip8-emulator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/2bdkid/chip8-emulator" "work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/2bdkid/chip8-emulator"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/2bdkid/chip8-emulator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/2bdkid/chip8-emulator" "work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/2bdkid/chip8-emulator"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/2bdkid/chip8-emulator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d581b520575029c8636995f66f8304940505ff55
[INFO] sha for GitHub repo 2bdkid/chip8-emulator: d581b520575029c8636995f66f8304940505ff55
[INFO] validating manifest of 2bdkid/chip8-emulator on toolchain master#6ea4036cd20a4b1ab1d56e555108c21735ff6946
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of 2bdkid/chip8-emulator on toolchain try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing 2bdkid/chip8-emulator
[INFO] finished frobbing 2bdkid/chip8-emulator
[INFO] frobbed toml for 2bdkid/chip8-emulator written to work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/2bdkid/chip8-emulator/Cargo.toml
[INFO] started frobbing 2bdkid/chip8-emulator
[INFO] finished frobbing 2bdkid/chip8-emulator
[INFO] frobbed toml for 2bdkid/chip8-emulator written to work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/2bdkid/chip8-emulator/Cargo.toml
[INFO] crate 2bdkid/chip8-emulator already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking 2bdkid/chip8-emulator against master#6ea4036cd20a4b1ab1d56e555108c21735ff6946 for pr-62181
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62181/worker-4/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/2bdkid/chip8-emulator:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e9cbcc6f76e54f72b669067057ef2cf0bb909d63781993ebf8618b3563eeba9d
[INFO] running `"docker" "start" "-a" "e9cbcc6f76e54f72b669067057ef2cf0bb909d63781993ebf8618b3563eeba9d"`
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]    Compiling ncurses v5.86.0
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking chip8_virtual_machine v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `ncurses`
[INFO] [stderr]  --> src/system.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use ncurses;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ncurses`
[INFO] [stderr]  --> src/system.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use ncurses;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `draw`
[INFO] [stderr]   --> src/display.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn draw() {
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `poll`
[INFO] [stderr]    --> src/keyboard.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 102 |     pub fn poll(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `draw`
[INFO] [stderr]   --> src/display.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn draw() {
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `poll`
[INFO] [stderr]    --> src/keyboard.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 102 |     pub fn poll(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.94s
[INFO] running `"docker" "inspect" "e9cbcc6f76e54f72b669067057ef2cf0bb909d63781993ebf8618b3563eeba9d"`
[INFO] running `"docker" "rm" "-f" "e9cbcc6f76e54f72b669067057ef2cf0bb909d63781993ebf8618b3563eeba9d"`
[INFO] [stdout] e9cbcc6f76e54f72b669067057ef2cf0bb909d63781993ebf8618b3563eeba9d