[INFO] cloning repository https://github.com/neil-b/gbc-emu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/neil-b/gbc-emu" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneil-b%2Fgbc-emu", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneil-b%2Fgbc-emu'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5c35b8256091171b70bbe636bfc39a8f17705032
[INFO] checking neil-b/gbc-emu against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fneil-b%2Fgbc-emu" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/neil-b/gbc-emu on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/neil-b/gbc-emu
[INFO] finished tweaking git repo https://github.com/neil-b/gbc-emu
[INFO] tweaked toml for git repo https://github.com/neil-b/gbc-emu written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/neil-b/gbc-emu already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "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] 2456e27c7eac5bbcb270c9a38a7e364e79e1dda3da511b266c57ba8c34a42ed7
[INFO] running `Command { std: "docker" "start" "-a" "2456e27c7eac5bbcb270c9a38a7e364e79e1dda3da511b266c57ba8c34a42ed7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2456e27c7eac5bbcb270c9a38a7e364e79e1dda3da511b266c57ba8c34a42ed7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2456e27c7eac5bbcb270c9a38a7e364e79e1dda3da511b266c57ba8c34a42ed7", kill_on_drop: false }`
[INFO] [stdout] 2456e27c7eac5bbcb270c9a38a7e364e79e1dda3da511b266c57ba8c34a42ed7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f091797dc3619f206e6df4872d70f8f85e0b32f24f505b7dc9dfc694cee7640f
[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" "f091797dc3619f206e6df4872d70f8f85e0b32f24f505b7dc9dfc694cee7640f", kill_on_drop: false }`
[INFO] [stderr]     Checking gbemu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/emulator.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/memory.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for mut page in &mut self.rom_secondary.pages {
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_page_mut`
[INFO] [stdout]   --> src/memory.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn get_page_mut(&mut self, page_index: usize) -> &mut MemoryBank {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_bank_mut`
[INFO] [stdout]    --> src/memory.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 |     fn get_bank_mut(&mut self, address: u16, page_index: usize) -> &mut MemoryBank {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write`
[INFO] [stdout]    --> src/memory.rs:151:12
[INFO] [stdout]     |
[INFO] [stdout] 151 |     pub fn write(&mut self, address: u16, page_index: usize, new_value: u8) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `join_u8_to_u16`
[INFO] [stdout]  --> src/registers.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn join_u8_to_u16(high: u8, low: u8) -> u16 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_af`
[INFO] [stdout]   --> src/registers.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get_af(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_af`
[INFO] [stdout]   --> src/registers.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn set_af(&mut self, new_af: u16) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_bc`
[INFO] [stdout]   --> src/registers.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn get_bc(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_bc`
[INFO] [stdout]   --> src/registers.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn set_bc(&mut self, new_bc: u16) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_de`
[INFO] [stdout]   --> src/registers.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn get_de(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_de`
[INFO] [stdout]   --> src/registers.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn set_de(&mut self, new_de: u16) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hl`
[INFO] [stdout]   --> src/registers.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn get_hl(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |             f.read_to_end(&mut rom_bytes);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/memory.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for mut page in &mut self.rom_secondary.pages {
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_bank_mut`
[INFO] [stdout]    --> src/memory.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 |     fn get_bank_mut(&mut self, address: u16, page_index: usize) -> &mut MemoryBank {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write`
[INFO] [stdout]    --> src/memory.rs:151:12
[INFO] [stdout]     |
[INFO] [stdout] 151 |     pub fn write(&mut self, address: u16, page_index: usize, new_value: u8) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `join_u8_to_u16`
[INFO] [stdout]  --> src/registers.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn join_u8_to_u16(high: u8, low: u8) -> u16 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_af`
[INFO] [stdout]   --> src/registers.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get_af(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_af`
[INFO] [stdout]   --> src/registers.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn set_af(&mut self, new_af: u16) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_bc`
[INFO] [stdout]   --> src/registers.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn get_bc(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_bc`
[INFO] [stdout]   --> src/registers.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn set_bc(&mut self, new_bc: u16) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_de`
[INFO] [stdout]   --> src/registers.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn get_de(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_de`
[INFO] [stdout]   --> src/registers.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn set_de(&mut self, new_de: u16) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hl`
[INFO] [stdout]   --> src/registers.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn get_hl(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |             f.read_to_end(&mut rom_bytes);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "f091797dc3619f206e6df4872d70f8f85e0b32f24f505b7dc9dfc694cee7640f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f091797dc3619f206e6df4872d70f8f85e0b32f24f505b7dc9dfc694cee7640f", kill_on_drop: false }`
[INFO] [stdout] f091797dc3619f206e6df4872d70f8f85e0b32f24f505b7dc9dfc694cee7640f