[INFO] updating cached repository acmiyaguchi/chip8-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/acmiyaguchi/chip8-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/acmiyaguchi/chip8-rust" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/acmiyaguchi/chip8-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/acmiyaguchi/chip8-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/acmiyaguchi/chip8-rust" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/acmiyaguchi/chip8-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/acmiyaguchi/chip8-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 707af4af63de8c3e3e9366c0c1e06d050eade9a6
[INFO] sha for GitHub repo acmiyaguchi/chip8-rust: 707af4af63de8c3e3e9366c0c1e06d050eade9a6
[INFO] validating manifest of acmiyaguchi/chip8-rust on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of acmiyaguchi/chip8-rust on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing acmiyaguchi/chip8-rust
[INFO] finished frobbing acmiyaguchi/chip8-rust
[INFO] frobbed toml for acmiyaguchi/chip8-rust written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/acmiyaguchi/chip8-rust/Cargo.toml
[INFO] started frobbing acmiyaguchi/chip8-rust
[INFO] finished frobbing acmiyaguchi/chip8-rust
[INFO] frobbed toml for acmiyaguchi/chip8-rust written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/acmiyaguchi/chip8-rust/Cargo.toml
[INFO] crate acmiyaguchi/chip8-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking acmiyaguchi/chip8-rust against try#8ec8125bea94852768b56958f05da47666c21ab0 for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-3/try#8ec8125bea94852768b56958f05da47666c21ab0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/acmiyaguchi/chip8-rust:/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" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7a6287e349fc2382800a745c3e8f3c5046b190a999e00c79a70768e07451d65f
[INFO] running `"docker" "start" "-a" "7a6287e349fc2382800a745c3e8f3c5046b190a999e00c79a70768e07451d65f"`
[INFO] [stderr]     Checking deflate v0.7.8
[INFO] [stderr]     Checking draw_state v0.7.0
[INFO] [stderr]     Checking rayon-core v1.0.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.36.0
[INFO] [stderr]     Checking rayon v0.7.0
[INFO] [stderr]     Checking gfx_core v0.7.0
[INFO] [stderr]     Checking png v0.7.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.12
[INFO] [stderr]     Checking image v0.13.0
[INFO] [stderr]     Checking gfx v0.15.1
[INFO] [stderr]     Checking gfx_device_gl v0.14.0
[INFO] [stderr]     Checking piston-gfx_texture v0.23.0
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.39.0
[INFO] [stderr]     Checking piston_window v0.65.0
[INFO] [stderr]     Checking chip8-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> src/main.rs:369:21
[INFO] [stderr]     |
[INFO] [stderr] 369 |         if let Some(args) = e.render_args() {
[INFO] [stderr]     |                     ^^^^ help: consider prefixing with an underscore: `_args`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> src/main.rs:379:21
[INFO] [stderr]     |
[INFO] [stderr] 379 |         if let Some(args) = e.update_args() {
[INFO] [stderr]     |                     ^^^^ help: consider prefixing with an underscore: `_args`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:146:13
[INFO] [stderr]     |
[INFO] [stderr] 146 |         let mut mem = &mut self.memory;
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:147:13
[INFO] [stderr]     |
[INFO] [stderr] 147 |         let mut reg = &mut self.register;
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:148:13
[INFO] [stderr]     |
[INFO] [stderr] 148 |         let mut stack = &mut self.stack;
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `register_I` should have a snake case name
[INFO] [stderr]   --> src/main.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     register_I: u16,
[INFO] [stderr]    |     ^^^^^^^^^^ help: convert the identifier to snake case: `register_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:118:9
[INFO] [stderr]     |
[INFO] [stderr] 118 |         f.read(&mut self.memory[0x200..]);
[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 `I` should have a snake case name
[INFO] [stderr]    --> src/main.rs:149:17
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let mut I = self.register_I;
[INFO] [stderr]     |                 ^ help: convert the identifier to snake case: `i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `PC` should have a snake case name
[INFO] [stderr]    --> src/main.rs:150:17
[INFO] [stderr]     |
[INFO] [stderr] 150 |         let mut PC = self.program_counter;
[INFO] [stderr]     |                 ^^ help: convert the identifier to snake case: `pc`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `SP` should have a snake case name
[INFO] [stderr]    --> src/main.rs:151:17
[INFO] [stderr]     |
[INFO] [stderr] 151 |         let mut SP = self.stack_pointer;
[INFO] [stderr]     |                 ^^ help: convert the identifier to snake case: `sp`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> src/main.rs:369:21
[INFO] [stderr]     |
[INFO] [stderr] 369 |         if let Some(args) = e.render_args() {
[INFO] [stderr]     |                     ^^^^ help: consider prefixing with an underscore: `_args`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]    --> src/main.rs:379:21
[INFO] [stderr]     |
[INFO] [stderr] 379 |         if let Some(args) = e.update_args() {
[INFO] [stderr]     |                     ^^^^ help: consider prefixing with an underscore: `_args`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:146:13
[INFO] [stderr]     |
[INFO] [stderr] 146 |         let mut mem = &mut self.memory;
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:147:13
[INFO] [stderr]     |
[INFO] [stderr] 147 |         let mut reg = &mut self.register;
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:148:13
[INFO] [stderr]     |
[INFO] [stderr] 148 |         let mut stack = &mut self.stack;
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `register_I` should have a snake case name
[INFO] [stderr]   --> src/main.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     register_I: u16,
[INFO] [stderr]    |     ^^^^^^^^^^ help: convert the identifier to snake case: `register_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:118:9
[INFO] [stderr]     |
[INFO] [stderr] 118 |         f.read(&mut self.memory[0x200..]);
[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 `I` should have a snake case name
[INFO] [stderr]    --> src/main.rs:149:17
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let mut I = self.register_I;
[INFO] [stderr]     |                 ^ help: convert the identifier to snake case: `i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `PC` should have a snake case name
[INFO] [stderr]    --> src/main.rs:150:17
[INFO] [stderr]     |
[INFO] [stderr] 150 |         let mut PC = self.program_counter;
[INFO] [stderr]     |                 ^^ help: convert the identifier to snake case: `pc`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `SP` should have a snake case name
[INFO] [stderr]    --> src/main.rs:151:17
[INFO] [stderr]     |
[INFO] [stderr] 151 |         let mut SP = self.stack_pointer;
[INFO] [stderr]     |                 ^^ help: convert the identifier to snake case: `sp`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.65s
[INFO] running `"docker" "inspect" "7a6287e349fc2382800a745c3e8f3c5046b190a999e00c79a70768e07451d65f"`
[INFO] running `"docker" "rm" "-f" "7a6287e349fc2382800a745c3e8f3c5046b190a999e00c79a70768e07451d65f"`
[INFO] [stdout] 7a6287e349fc2382800a745c3e8f3c5046b190a999e00c79a70768e07451d65f