[INFO] cloning repository https://github.com/rpg2014/CHIP-8
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rpg2014/CHIP-8" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frpg2014%2FCHIP-8", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frpg2014%2FCHIP-8'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f7db781dba1ff4452085c27c4218858e0b68f9e
[INFO] building rpg2014/CHIP-8 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frpg2014%2FCHIP-8" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rpg2014/CHIP-8 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rpg2014/CHIP-8
[INFO] finished tweaking git repo https://github.com/rpg2014/CHIP-8
[INFO] tweaked toml for git repo https://github.com/rpg2014/CHIP-8 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rpg2014/CHIP-8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossterm_winapi v0.1.5
[INFO] [stderr]   Downloaded string-error v0.1.0
[INFO] [stderr]   Downloaded crossterm_style v0.4.1
[INFO] [stderr]   Downloaded crossterm_utils v0.2.4
[INFO] [stderr]   Downloaded crossterm_screen v0.2.5
[INFO] [stderr]   Downloaded crossterm_input v0.3.9
[INFO] [stderr]   Downloaded crossterm v0.10.2
[INFO] [stderr]   Downloaded crossterm_cursor v0.2.6
[INFO] [stderr]   Downloaded crossterm_terminal v0.2.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db2d104bd120e0ec99f63af5615d28f94f7b41c7f398407579ea18ac27f9435d
[INFO] running `Command { std: "docker" "start" "-a" "db2d104bd120e0ec99f63af5615d28f94f7b41c7f398407579ea18ac27f9435d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db2d104bd120e0ec99f63af5615d28f94f7b41c7f398407579ea18ac27f9435d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db2d104bd120e0ec99f63af5615d28f94f7b41c7f398407579ea18ac27f9435d", kill_on_drop: false }`
[INFO] [stdout] db2d104bd120e0ec99f63af5615d28f94f7b41c7f398407579ea18ac27f9435d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e81d4413530c11162c4820212f50a2008b2beabc40c42ce63674ab28a66c45d
[INFO] running `Command { std: "docker" "start" "-a" "0e81d4413530c11162c4820212f50a2008b2beabc40c42ce63674ab28a66c45d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling string-error v0.1.0
[INFO] [stderr]    Compiling crossterm_utils v0.2.4
[INFO] [stderr]    Compiling crossterm_cursor v0.2.6
[INFO] [stderr]    Compiling crossterm_screen v0.2.5
[INFO] [stderr]    Compiling crossterm_style v0.4.1
[INFO] [stderr]    Compiling crossterm_input v0.3.9
[INFO] [stderr]    Compiling crossterm_terminal v0.2.6
[INFO] [stderr]    Compiling crossterm v0.10.2
[INFO] [stderr]    Compiling CHIP-8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ClearType`
[INFO] [stdout]  --> src/main.rs:6:75
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crossterm::{terminal, Terminal, RawScreen, Crossterm, TerminalCursor, ClearType, AsyncReader, InputEvent, KeyEvent};
[INFO] [stdout]   |                                                                           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Bytes`
[INFO] [stdout]  --> src/chip.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Bytes;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `string_error::static_err`
[INFO] [stdout]  --> src/chip.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use string_error::static_err;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Chip_8` should have an upper camel case name
[INFO] [stdout]   --> src/chip.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Chip_8 {
[INFO] [stdout]    |            ^^^^^^ help: convert the identifier to upper camel case: `Chip8`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/main.rs:48:42
[INFO] [stdout]    |
[INFO] [stdout] 48 |             print!("{}", graphics_buffer[(x as usize * y as usize)])
[INFO] [stdout]    |                                          ^                       ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 48 -             print!("{}", graphics_buffer[(x as usize * y as usize)])
[INFO] [stdout] 48 +             print!("{}", graphics_buffer[x as usize * y as usize])
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     loop {
[INFO] [stdout] 28 | |         // this must take ~17 ms or whatever is 60 fps.  
[INFO] [stdout] 29 | |         chip.run_cycle()?;
[INFO] [stdout] 30 | |         draw_graphics(&chip.get_graphics_buffer(), &terminal)?;
[INFO] [stdout] ...  |
[INFO] [stdout] 33 | |         };
[INFO] [stdout] 34 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 35 |
[INFO] [stdout] 36 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/keyboard.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn is_valid_key(c: char) -> bool {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw`
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let raw = RawScreen::into_raw_mode();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_raw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `terminal`
[INFO] [stdout]   --> src/main.rs:41:49
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn draw_graphics(graphics_buffer: &[u8; 64*32], terminal: &Terminal) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_terminal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_key_press` is never used
[INFO] [stdout]   --> src/keyboard.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Keyboard {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn add_key_press(&mut self, key: char){
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `doBeep` should have a snake case name
[INFO] [stdout]    --> src/chip.rs:191:4
[INFO] [stdout]     |
[INFO] [stdout] 191 | fn doBeep() {
[INFO] [stdout]     |    ^^^^^^ help: convert the identifier to snake case: `do_beep`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "0e81d4413530c11162c4820212f50a2008b2beabc40c42ce63674ab28a66c45d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e81d4413530c11162c4820212f50a2008b2beabc40c42ce63674ab28a66c45d", kill_on_drop: false }`
[INFO] [stdout] 0e81d4413530c11162c4820212f50a2008b2beabc40c42ce63674ab28a66c45d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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 -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8626b1179f44c1a3872a5c2930626798852509a8a2eb87ff98d2deed2ada491b
[INFO] running `Command { std: "docker" "start" "-a" "8626b1179f44c1a3872a5c2930626798852509a8a2eb87ff98d2deed2ada491b", kill_on_drop: false }`
[INFO] [stderr]    Compiling CHIP-8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ClearType`
[INFO] [stdout]  --> src/main.rs:6:75
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crossterm::{terminal, Terminal, RawScreen, Crossterm, TerminalCursor, ClearType, AsyncReader, InputEvent, KeyEvent};
[INFO] [stdout]   |                                                                           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Bytes`
[INFO] [stdout]  --> src/chip.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Bytes;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `string_error::static_err`
[INFO] [stdout]  --> src/chip.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use string_error::static_err;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Chip_8` should have an upper camel case name
[INFO] [stdout]   --> src/chip.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Chip_8 {
[INFO] [stdout]    |            ^^^^^^ help: convert the identifier to upper camel case: `Chip8`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/chip.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 181 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/main.rs:48:42
[INFO] [stdout]    |
[INFO] [stdout] 48 |             print!("{}", graphics_buffer[(x as usize * y as usize)])
[INFO] [stdout]    |                                          ^                       ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 48 -             print!("{}", graphics_buffer[(x as usize * y as usize)])
[INFO] [stdout] 48 +             print!("{}", graphics_buffer[x as usize * y as usize])
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     loop {
[INFO] [stdout] 28 | |         // this must take ~17 ms or whatever is 60 fps.  
[INFO] [stdout] 29 | |         chip.run_cycle()?;
[INFO] [stdout] 30 | |         draw_graphics(&chip.get_graphics_buffer(), &terminal)?;
[INFO] [stdout] ...  |
[INFO] [stdout] 33 | |         };
[INFO] [stdout] 34 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 35 |
[INFO] [stdout] 36 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/keyboard.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn is_valid_key(c: char) -> bool {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `raw`
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let raw = RawScreen::into_raw_mode();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_raw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `terminal`
[INFO] [stdout]   --> src/main.rs:41:49
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn draw_graphics(graphics_buffer: &[u8; 64*32], terminal: &Terminal) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |                                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_terminal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_key_press` is never used
[INFO] [stdout]   --> src/keyboard.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Keyboard {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn add_key_press(&mut self, key: char){
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `doBeep` should have a snake case name
[INFO] [stdout]    --> src/chip.rs:191:4
[INFO] [stdout]     |
[INFO] [stdout] 191 | fn doBeep() {
[INFO] [stdout]     |    ^^^^^^ help: convert the identifier to snake case: `do_beep`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `execute_instruction_should_catchOpCode` should have a snake case name
[INFO] [stdout]    --> src/chip.rs:184:8
[INFO] [stdout]     |
[INFO] [stdout] 184 |     fn execute_instruction_should_catchOpCode() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `execute_instruction_should_catch_op_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "8626b1179f44c1a3872a5c2930626798852509a8a2eb87ff98d2deed2ada491b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8626b1179f44c1a3872a5c2930626798852509a8a2eb87ff98d2deed2ada491b", kill_on_drop: false }`
[INFO] [stdout] 8626b1179f44c1a3872a5c2930626798852509a8a2eb87ff98d2deed2ada491b