[INFO] updating cached repository https://github.com/mmiecz/chip8-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e1a108b4c2d523484451138cea2b06efdf2fb3ef
[INFO] checking mmiecz/chip8-rust against try#ba14a92a10441c4b839ce71e6ef5f7a48bbff18f for prs-64470-and-65389
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmmiecz%2Fchip8-rust" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mmiecz/chip8-rust on toolchain ba14a92a10441c4b839ce71e6ef5f7a48bbff18f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mmiecz/chip8-rust
[INFO] finished tweaking git repo https://github.com/mmiecz/chip8-rust
[INFO] tweaked toml for git repo https://github.com/mmiecz/chip8-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/mmiecz/chip8-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=forbid" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+ba14a92a10441c4b839ce71e6ef5f7a48bbff18f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0d698b9423428597b36b8656d78f0be5678a1b555427f3d8011ee837e3bb5f24
[INFO] running `"docker" "start" "-a" "0d698b9423428597b36b8656d78f0be5678a1b555427f3d8011ee837e3bb5f24"`
[INFO] [stderr]    Compiling backtrace-sys v0.1.5
[INFO] [stderr]    Compiling glium v0.16.0
[INFO] [stderr]     Checking backtrace v0.2.3
[INFO] [stderr]     Checking chip8-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/mem.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 |         let mut f = try!(File::open(path));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/mem.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         try!(f.read_to_end(&mut buffer));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `rand` is imported redundantly
[INFO] [stderr]    --> src/cpu.rs:423:13
[INFO] [stderr]     |
[INFO] [stderr] 423 |         use rand;
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/main.rs:1:1
[INFO] [stderr]     |
[INFO] [stderr] 1   | extern crate rand;
[INFO] [stderr]     | ------------------ the item `rand` is already imported here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `glium::glutin::VirtualKeyCode`
[INFO] [stderr]    --> src/cpu.rs:446:13
[INFO] [stderr]     |
[INFO] [stderr] 446 |         use glium::glutin::VirtualKeyCode;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `glium::glutin::VirtualKeyCode`
[INFO] [stderr]    --> src/cpu.rs:455:13
[INFO] [stderr]     |
[INFO] [stderr] 455 |         use glium::glutin::VirtualKeyCode;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `glium::DisplayBuild`
[INFO] [stderr]  --> src/input.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use glium::DisplayBuild;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/input.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time`
[INFO] [stderr]  --> src/input.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::time;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `glium::glutin`
[INFO] [stderr]  --> src/display.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use glium::glutin;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/display.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/display.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `CpuError`, `Cpu`, `DecoderError`
[INFO] [stderr]  --> src/main.rs:9:11
[INFO] [stderr]   |
[INFO] [stderr] 9 | use cpu::{Cpu, DecoderError, CpuError};
[INFO] [stderr]   |           ^^^  ^^^^^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Event`, `VirtualKeyCode`
[INFO] [stderr]   --> src/main.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 | use glium::glutin::{VirtualKeyCode, Event};
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/cpu.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 263 |         unimplemented!();
[INFO] [stderr]     |         ----------------- any code following this expression is unreachable
[INFO] [stderr] 264 |         "cls".to_string()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/cpu.rs:480:9
[INFO] [stderr]     |
[INFO] [stderr] 479 |         panic!("Not implemented wait_for_keypress");
[INFO] [stderr]     |         -------------------------------------------- any code following this expression is unreachable
[INFO] [stderr] 480 |         format!("wkp {:#x}", self.regs.v[reg])
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `what`
[INFO] [stderr]   --> src/cpu.rs:75:17
[INFO] [stderr]    |
[INFO] [stderr] 75 |             Err(what) => Err(CpuError::DecoderError)
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_what`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `placeholder_display`
[INFO] [stderr]    --> src/cpu.rs:262:23
[INFO] [stderr]     |
[INFO] [stderr] 262 |     fn cls(&mut self, placeholder_display : u8 ) -> String  {
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_placeholder_display`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reg`
[INFO] [stderr]    --> src/cpu.rs:478:37
[INFO] [stderr]     |
[INFO] [stderr] 478 |     fn wait_for_keypress(&mut self, reg: usize) -> String  {
[INFO] [stderr]     |                                     ^^^ help: consider prefixing with an underscore: `_reg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `title`
[INFO] [stderr]   --> src/display.rs:30:39
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(dimension: (u32, u32), title: &str) -> Result<Self, DisplayBuildError> {
[INFO] [stderr]    |                                       ^^^^^ help: consider prefixing with an underscore: `_title`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/mem.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 |         let mut f = try!(File::open(path));
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/mem.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         try!(f.read_to_end(&mut buffer));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `rand` is imported redundantly
[INFO] [stderr]    --> src/cpu.rs:423:13
[INFO] [stderr]     |
[INFO] [stderr] 423 |         use rand;
[INFO] [stderr]     |             ^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/main.rs:1:1
[INFO] [stderr]     |
[INFO] [stderr] 1   | extern crate rand;
[INFO] [stderr]     | ------------------ the item `rand` is already imported here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `glium::glutin::VirtualKeyCode`
[INFO] [stderr]    --> src/cpu.rs:446:13
[INFO] [stderr]     |
[INFO] [stderr] 446 |         use glium::glutin::VirtualKeyCode;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `glium::glutin::VirtualKeyCode`
[INFO] [stderr]    --> src/cpu.rs:455:13
[INFO] [stderr]     |
[INFO] [stderr] 455 |         use glium::glutin::VirtualKeyCode;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `glium::DisplayBuild`
[INFO] [stderr]  --> src/input.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use glium::DisplayBuild;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/input.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time`
[INFO] [stderr]  --> src/input.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::time;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `glium::glutin`
[INFO] [stderr]  --> src/display.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use glium::glutin;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/display.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/display.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `CpuError`, `Cpu`, `DecoderError`
[INFO] [stderr]  --> src/main.rs:9:11
[INFO] [stderr]   |
[INFO] [stderr] 9 | use cpu::{Cpu, DecoderError, CpuError};
[INFO] [stderr]   |           ^^^  ^^^^^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Event`, `VirtualKeyCode`
[INFO] [stderr]   --> src/main.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 | use glium::glutin::{VirtualKeyCode, Event};
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/display.rs:99:13
[INFO] [stderr]    |
[INFO] [stderr] 99 |         let mut collision = false;
[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: field is never used: `is_closing`
[INFO] [stderr]  --> src/input.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     is_closing : bool,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidDimensionError`
[INFO] [stderr]   --> src/display.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     InvalidDimensionError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/cpu.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 263 |         unimplemented!();
[INFO] [stderr]     |         ----------------- any code following this expression is unreachable
[INFO] [stderr] 264 |         "cls".to_string()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/cpu.rs:480:9
[INFO] [stderr]     |
[INFO] [stderr] 479 |         panic!("Not implemented wait_for_keypress");
[INFO] [stderr]     |         -------------------------------------------- any code following this expression is unreachable
[INFO] [stderr] 480 |         format!("wkp {:#x}", self.regs.v[reg])
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `what`
[INFO] [stderr]   --> src/cpu.rs:75:17
[INFO] [stderr]    |
[INFO] [stderr] 75 |             Err(what) => Err(CpuError::DecoderError)
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_what`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `placeholder_display`
[INFO] [stderr]    --> src/cpu.rs:262:23
[INFO] [stderr]     |
[INFO] [stderr] 262 |     fn cls(&mut self, placeholder_display : u8 ) -> String  {
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_placeholder_display`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reg`
[INFO] [stderr]    --> src/cpu.rs:478:37
[INFO] [stderr]     |
[INFO] [stderr] 478 |     fn wait_for_keypress(&mut self, reg: usize) -> String  {
[INFO] [stderr]     |                                     ^^^ help: consider prefixing with an underscore: `_reg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `title`
[INFO] [stderr]   --> src/display.rs:30:39
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn new(dimension: (u32, u32), title: &str) -> Result<Self, DisplayBuildError> {
[INFO] [stderr]    |                                       ^^^^^ help: consider prefixing with an underscore: `_title`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/display.rs:99:13
[INFO] [stderr]    |
[INFO] [stderr] 99 |         let mut collision = false;
[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: field is never used: `is_closing`
[INFO] [stderr]  --> src/input.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     is_closing : bool,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidDimensionError`
[INFO] [stderr]   --> src/display.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     InvalidDimensionError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.77s
[INFO] running `"docker" "inspect" "0d698b9423428597b36b8656d78f0be5678a1b555427f3d8011ee837e3bb5f24"`
[INFO] running `"docker" "rm" "-f" "0d698b9423428597b36b8656d78f0be5678a1b555427f3d8011ee837e3bb5f24"`
[INFO] [stdout] 0d698b9423428597b36b8656d78f0be5678a1b555427f3d8011ee837e3bb5f24