[INFO] updating cached repository https://github.com/divyenduz/ferrous-boy
[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] 01978236c331d662773c78f07c0e37a7300f9c65
[INFO] checking divyenduz/ferrous-boy against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdivyenduz%2Fferrous-boy" "/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/divyenduz/ferrous-boy on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/divyenduz/ferrous-boy
[INFO] finished tweaking git repo https://github.com/divyenduz/ferrous-boy
[INFO] tweaked toml for git repo https://github.com/divyenduz/ferrous-boy written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/divyenduz/ferrous-boy already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] f86b4c1956fa9873d1887dc9936a5a9a21c7142142dcae53fbb789177415639f
[INFO] running `"docker" "start" "-a" "f86b4c1956fa9873d1887dc9936a5a9a21c7142142dcae53fbb789177415639f"`
[INFO] [stderr]     Checking ferrous-boy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `Registers`
[INFO] [stderr]  --> src/main.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Registers {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_bc`
[INFO] [stderr]   --> src/main.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   fn get_bc(&self) -> u16 {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_bc`
[INFO] [stderr]   --> src/main.rs:18:3
[INFO] [stderr]    |
[INFO] [stderr] 18 |   fn set_bc(&mut self, value: u16) {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Instruction`
[INFO] [stderr]   --> src/main.rs:89:6
[INFO] [stderr]    |
[INFO] [stderr] 89 | enum Instruction {
[INFO] [stderr]    |      ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ArithmeticTarget`
[INFO] [stderr]   --> src/main.rs:98:6
[INFO] [stderr]    |
[INFO] [stderr] 98 | enum ArithmeticTarget {
[INFO] [stderr]    |      ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `execute`
[INFO] [stderr]    --> src/main.rs:109:3
[INFO] [stderr]     |
[INFO] [stderr] 109 |   fn execute(&mut self, instruction: Instruction) -> u16 {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `jump`
[INFO] [stderr]    --> src/main.rs:144:3
[INFO] [stderr]     |
[INFO] [stderr] 144 |   fn jump(&self, should_jump: bool) -> u16 {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]    --> src/main.rs:159:3
[INFO] [stderr]     |
[INFO] [stderr] 159 |   fn add(&mut self, value: u8) -> u8 {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `CPU`
[INFO] [stderr]    --> src/main.rs:172:8
[INFO] [stderr]     |
[INFO] [stderr] 172 | struct CPU {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MemoryBus`
[INFO] [stderr]    --> src/main.rs:178:8
[INFO] [stderr]     |
[INFO] [stderr] 178 | struct MemoryBus {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_byte`
[INFO] [stderr]    --> src/main.rs:183:3
[INFO] [stderr]     |
[INFO] [stderr] 183 |   fn read_byte(&self, address: u16) -> u8 {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `step`
[INFO] [stderr]    --> src/main.rs:189:3
[INFO] [stderr]     |
[INFO] [stderr] 189 |   fn step(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_byte`
[INFO] [stderr]    --> src/main.rs:212:3
[INFO] [stderr]     |
[INFO] [stderr] 212 |   fn from_byte(byte: u8, prefixed: bool) -> Option<Instruction> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_byte_prefixed`
[INFO] [stderr]    --> src/main.rs:220:3
[INFO] [stderr]     |
[INFO] [stderr] 220 |   fn from_byte_prefixed(byte: u8) -> Option<Instruction> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_byte_not_prefixed`
[INFO] [stderr]    --> src/main.rs:231:3
[INFO] [stderr]     |
[INFO] [stderr] 231 |   fn from_byte_not_prefixed(byte: u8) -> Option<Instruction> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `JumpTest`
[INFO] [stderr]    --> src/main.rs:243:6
[INFO] [stderr]     |
[INFO] [stderr] 243 | enum JumpTest {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 16 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Registers`
[INFO] [stderr]  --> src/main.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Registers {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_bc`
[INFO] [stderr]   --> src/main.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   fn get_bc(&self) -> u16 {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_bc`
[INFO] [stderr]   --> src/main.rs:18:3
[INFO] [stderr]    |
[INFO] [stderr] 18 |   fn set_bc(&mut self, value: u16) {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Instruction`
[INFO] [stderr]   --> src/main.rs:89:6
[INFO] [stderr]    |
[INFO] [stderr] 89 | enum Instruction {
[INFO] [stderr]    |      ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ArithmeticTarget`
[INFO] [stderr]   --> src/main.rs:98:6
[INFO] [stderr]    |
[INFO] [stderr] 98 | enum ArithmeticTarget {
[INFO] [stderr]    |      ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `execute`
[INFO] [stderr]    --> src/main.rs:109:3
[INFO] [stderr]     |
[INFO] [stderr] 109 |   fn execute(&mut self, instruction: Instruction) -> u16 {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `jump`
[INFO] [stderr]    --> src/main.rs:144:3
[INFO] [stderr]     |
[INFO] [stderr] 144 |   fn jump(&self, should_jump: bool) -> u16 {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]    --> src/main.rs:159:3
[INFO] [stderr]     |
[INFO] [stderr] 159 |   fn add(&mut self, value: u8) -> u8 {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `CPU`
[INFO] [stderr]    --> src/main.rs:172:8
[INFO] [stderr]     |
[INFO] [stderr] 172 | struct CPU {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MemoryBus`
[INFO] [stderr]    --> src/main.rs:178:8
[INFO] [stderr]     |
[INFO] [stderr] 178 | struct MemoryBus {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_byte`
[INFO] [stderr]    --> src/main.rs:183:3
[INFO] [stderr]     |
[INFO] [stderr] 183 |   fn read_byte(&self, address: u16) -> u8 {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `step`
[INFO] [stderr]    --> src/main.rs:189:3
[INFO] [stderr]     |
[INFO] [stderr] 189 |   fn step(&mut self) {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_byte`
[INFO] [stderr]    --> src/main.rs:212:3
[INFO] [stderr]     |
[INFO] [stderr] 212 |   fn from_byte(byte: u8, prefixed: bool) -> Option<Instruction> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_byte_prefixed`
[INFO] [stderr]    --> src/main.rs:220:3
[INFO] [stderr]     |
[INFO] [stderr] 220 |   fn from_byte_prefixed(byte: u8) -> Option<Instruction> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_byte_not_prefixed`
[INFO] [stderr]    --> src/main.rs:231:3
[INFO] [stderr]     |
[INFO] [stderr] 231 |   fn from_byte_not_prefixed(byte: u8) -> Option<Instruction> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `JumpTest`
[INFO] [stderr]    --> src/main.rs:243:6
[INFO] [stderr]     |
[INFO] [stderr] 243 | enum JumpTest {
[INFO] [stderr]     |      ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 16 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "f86b4c1956fa9873d1887dc9936a5a9a21c7142142dcae53fbb789177415639f"`
[INFO] running `"docker" "rm" "-f" "f86b4c1956fa9873d1887dc9936a5a9a21c7142142dcae53fbb789177415639f"`
[INFO] [stdout] f86b4c1956fa9873d1887dc9936a5a9a21c7142142dcae53fbb789177415639f