[INFO] cloning repository https://github.com/sturdy-robot/sturdychip8
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sturdy-robot/sturdychip8" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsturdy-robot%2Fsturdychip8", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsturdy-robot%2Fsturdychip8'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d2c11a0c100ed67c162a77d0ddfb3cfc4acbfba4
[INFO] checking sturdy-robot/sturdychip8 against master#d93f678fa55842cccd2f091deccd93e9494b3764 for pr-138844
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsturdy-robot%2Fsturdychip8" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sturdy-robot/sturdychip8 on toolchain d93f678fa55842cccd2f091deccd93e9494b3764
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sturdy-robot/sturdychip8
[INFO] finished tweaking git repo https://github.com/sturdy-robot/sturdychip8
[INFO] tweaked toml for git repo https://github.com/sturdy-robot/sturdychip8 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sturdy-robot/sturdychip8 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" "+d93f678fa55842cccd2f091deccd93e9494b3764" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d72b4a87db1d32d8eff53e0f6c086ad2317d3e5fdbc42156fa62411b7c8f0f5d
[INFO] running `Command { std: "docker" "start" "-a" "d72b4a87db1d32d8eff53e0f6c086ad2317d3e5fdbc42156fa62411b7c8f0f5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d72b4a87db1d32d8eff53e0f6c086ad2317d3e5fdbc42156fa62411b7c8f0f5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d72b4a87db1d32d8eff53e0f6c086ad2317d3e5fdbc42156fa62411b7c8f0f5d", kill_on_drop: false }`
[INFO] [stdout] d72b4a87db1d32d8eff53e0f6c086ad2317d3e5fdbc42156fa62411b7c8f0f5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+d93f678fa55842cccd2f091deccd93e9494b3764" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2626e90a0aca20f8f66e3135d6a61af6c95eefdc89d7345693da4df5731a9ce4
[INFO] running `Command { std: "docker" "start" "-a" "2626e90a0aca20f8f66e3135d6a61af6c95eefdc89d7345693da4df5731a9ce4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking sturdychip8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rom_data`
[INFO] [stdout]  --> src/core/rom.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let rom_data = fs::read(filename).expect("Unable to read file contents");
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rom_data`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cpu` is never constructed
[INFO] [stdout]  --> src/core/cpu.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Cpu {
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Registers` is never constructed
[INFO] [stdout]  --> src/core/registers.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Registers {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/core/registers.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Registers {
[INFO] [stdout]   | -------------- associated function in this implementation
[INFO] [stdout] 8 |     pub fn new() -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]  --> src/core/instructions.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn decode(cpu: &mut Cpu) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode_op0x` is never used
[INFO] [stdout]   --> src/core/instructions.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn decode_op0x(cpu: &mut Cpu) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode_op8x` is never used
[INFO] [stdout]   --> src/core/instructions.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn decode_op8x(cpu: &mut Cpu) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_rom` is never used
[INFO] [stdout]  --> src/core/rom.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn read_rom(filename: &str) {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rom_data`
[INFO] [stdout]  --> src/core/rom.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let rom_data = fs::read(filename).expect("Unable to read file contents");
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rom_data`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cpu` is never constructed
[INFO] [stdout]  --> src/core/cpu.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Cpu {
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Registers` is never constructed
[INFO] [stdout]  --> src/core/registers.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Registers {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/core/registers.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Registers {
[INFO] [stdout]   | -------------- associated function in this implementation
[INFO] [stdout] 8 |     pub fn new() -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]  --> src/core/instructions.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn decode(cpu: &mut Cpu) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode_op0x` is never used
[INFO] [stdout]   --> src/core/instructions.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn decode_op0x(cpu: &mut Cpu) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode_op8x` is never used
[INFO] [stdout]   --> src/core/instructions.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn decode_op8x(cpu: &mut Cpu) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_rom` is never used
[INFO] [stdout]  --> src/core/rom.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn read_rom(filename: &str) {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.09s
[INFO] running `Command { std: "docker" "inspect" "2626e90a0aca20f8f66e3135d6a61af6c95eefdc89d7345693da4df5731a9ce4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2626e90a0aca20f8f66e3135d6a61af6c95eefdc89d7345693da4df5731a9ce4", kill_on_drop: false }`
[INFO] [stdout] 2626e90a0aca20f8f66e3135d6a61af6c95eefdc89d7345693da4df5731a9ce4