[INFO] cloning repository https://github.com/masnax/rustygameboy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/masnax/rustygameboy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasnax%2Frustygameboy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasnax%2Frustygameboy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dbb957186fe8ee2e2a8e8e55d3ac03e85afec3c6
[INFO] checking masnax/rustygameboy against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasnax%2Frustygameboy" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/masnax/rustygameboy on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/masnax/rustygameboy
[INFO] finished tweaking git repo https://github.com/masnax/rustygameboy
[INFO] tweaked toml for git repo https://github.com/masnax/rustygameboy written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/masnax/rustygameboy already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e3aaa30258b35b7f6ea598510e40925ed322cdb8a88f3cdf43d9b9322a53fdf
[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" "7e3aaa30258b35b7f6ea598510e40925ed322cdb8a88f3cdf43d9b9322a53fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e3aaa30258b35b7f6ea598510e40925ed322cdb8a88f3cdf43d9b9322a53fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e3aaa30258b35b7f6ea598510e40925ed322cdb8a88f3cdf43d9b9322a53fdf", kill_on_drop: false }`
[INFO] [stdout] 7e3aaa30258b35b7f6ea598510e40925ed322cdb8a88f3cdf43d9b9322a53fdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a2890b5b2b204b448f74c5704eabc4dec26076d7d1e16d1ce7ffccc46d7679d
[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" "6a2890b5b2b204b448f74c5704eabc4dec26076d7d1e16d1ce7ffccc46d7679d", kill_on_drop: false }`
[INFO] [stderr]     Checking rustygameboy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `CPU`
[INFO] [stdout]  --> src/cpu.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct CPU {
[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: `init`
[INFO] [stdout]   --> src/cpu.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn init() -> CPU {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_opcode`
[INFO] [stdout]   --> src/cpu.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn read_opcode(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_word`
[INFO] [stdout]   --> src/cpu.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn scan_word(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_byte`
[INFO] [stdout]   --> src/cpu.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn scan_byte(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exec`
[INFO] [stdout]   --> src/cpu.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn exec(&mut self) -> u8 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exec_cb`
[INFO] [stdout]    --> src/cpu.rs:542:12
[INFO] [stdout]     |
[INFO] [stdout] 542 |     pub fn exec_cb(&mut self) -> u8 {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `B`
[INFO] [stdout]   --> src/register.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     B  = 0x02,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `D`
[INFO] [stdout]   --> src/register.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     D  = 0x04,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `E`
[INFO] [stdout]   --> src/register.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     E  = 0x05,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `H`
[INFO] [stdout]   --> src/register.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     H  = 0x06,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `L`
[INFO] [stdout]   --> src/register.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     L  = 0x07,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]   --> src/register.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn init() -> Register {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_word`
[INFO] [stdout]   --> src/register.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn write_word(&mut self, addr: u16, value: u16) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_word`
[INFO] [stdout]    --> src/register.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn read_word(&self, addr: u16) -> u16 {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MotherBoard`
[INFO] [stdout]  --> src/main.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct MotherBoard {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `CPU`
[INFO] [stdout]  --> src/cpu.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct CPU {
[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: `init`
[INFO] [stdout]   --> src/cpu.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn init() -> CPU {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_opcode`
[INFO] [stdout]   --> src/cpu.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn read_opcode(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_word`
[INFO] [stdout]   --> src/cpu.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn scan_word(&self) -> u16 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_byte`
[INFO] [stdout]   --> src/cpu.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn scan_byte(&self) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exec`
[INFO] [stdout]   --> src/cpu.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn exec(&mut self) -> u8 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exec_cb`
[INFO] [stdout]    --> src/cpu.rs:542:12
[INFO] [stdout]     |
[INFO] [stdout] 542 |     pub fn exec_cb(&mut self) -> u8 {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `B`
[INFO] [stdout]   --> src/register.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     B  = 0x02,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `D`
[INFO] [stdout]   --> src/register.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     D  = 0x04,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `E`
[INFO] [stdout]   --> src/register.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     E  = 0x05,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `H`
[INFO] [stdout]   --> src/register.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     H  = 0x06,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `L`
[INFO] [stdout]   --> src/register.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     L  = 0x07,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]   --> src/register.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub fn init() -> Register {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_word`
[INFO] [stdout]   --> src/register.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn write_word(&mut self, addr: u16, value: u16) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_word`
[INFO] [stdout]    --> src/register.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn read_word(&self, addr: u16) -> u16 {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MotherBoard`
[INFO] [stdout]  --> src/main.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct MotherBoard {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "6a2890b5b2b204b448f74c5704eabc4dec26076d7d1e16d1ce7ffccc46d7679d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a2890b5b2b204b448f74c5704eabc4dec26076d7d1e16d1ce7ffccc46d7679d", kill_on_drop: false }`
[INFO] [stdout] 6a2890b5b2b204b448f74c5704eabc4dec26076d7d1e16d1ce7ffccc46d7679d