[INFO] updating cached repository divyenduz/ferrous-boy
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/divyenduz/ferrous-boy
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/divyenduz/ferrous-boy" "work/ex/beta-1.38-1/sources/1.37.0/gh/divyenduz/ferrous-boy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/divyenduz/ferrous-boy'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/divyenduz/ferrous-boy" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/divyenduz/ferrous-boy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/divyenduz/ferrous-boy'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 01978236c331d662773c78f07c0e37a7300f9c65
[INFO] sha for GitHub repo divyenduz/ferrous-boy: 01978236c331d662773c78f07c0e37a7300f9c65
[INFO] validating manifest of divyenduz/ferrous-boy on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of divyenduz/ferrous-boy on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing divyenduz/ferrous-boy
[INFO] finished frobbing divyenduz/ferrous-boy
[INFO] frobbed toml for divyenduz/ferrous-boy written to work/ex/beta-1.38-1/sources/1.37.0/gh/divyenduz/ferrous-boy/Cargo.toml
[INFO] started frobbing divyenduz/ferrous-boy
[INFO] finished frobbing divyenduz/ferrous-boy
[INFO] frobbed toml for divyenduz/ferrous-boy written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/divyenduz/ferrous-boy/Cargo.toml
[INFO] crate divyenduz/ferrous-boy already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing divyenduz/ferrous-boy against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/divyenduz/ferrous-boy:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 2cae466f39dbb548582981b2ef5a23fd505c03f70abc4703dcbaaaa4c695142a
[INFO] running `"docker" "start" "-a" "2cae466f39dbb548582981b2ef5a23fd505c03f70abc4703dcbaaaa4c695142a"`
[INFO] [stderr]    Compiling ferrous-boy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Registers`
[INFO] [stderr]  --> src/main.rs:1:1
[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:89:1
[INFO] [stderr]    |
[INFO] [stderr] 89 | enum Instruction {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ArithmeticTarget`
[INFO] [stderr]   --> src/main.rs:98:1
[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:172:1
[INFO] [stderr]     |
[INFO] [stderr] 172 | struct CPU {
[INFO] [stderr]     | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MemoryBus`
[INFO] [stderr]    --> src/main.rs:178:1
[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:243:1
[INFO] [stderr]     |
[INFO] [stderr] 243 | enum JumpTest {
[INFO] [stderr]     | ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "2cae466f39dbb548582981b2ef5a23fd505c03f70abc4703dcbaaaa4c695142a"`
[INFO] running `"docker" "rm" "-f" "2cae466f39dbb548582981b2ef5a23fd505c03f70abc4703dcbaaaa4c695142a"`
[INFO] [stdout] 2cae466f39dbb548582981b2ef5a23fd505c03f70abc4703dcbaaaa4c695142a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/divyenduz/ferrous-boy:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4efbd1192ed9052e69eb005356f7882b005b8a4d17b1045b7c2812993ca44379
[INFO] running `"docker" "start" "-a" "4efbd1192ed9052e69eb005356f7882b005b8a4d17b1045b7c2812993ca44379"`
[INFO] [stderr]    Compiling ferrous-boy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Registers`
[INFO] [stderr]  --> src/main.rs:1:1
[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:89:1
[INFO] [stderr]    |
[INFO] [stderr] 89 | enum Instruction {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ArithmeticTarget`
[INFO] [stderr]   --> src/main.rs:98:1
[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:172:1
[INFO] [stderr]     |
[INFO] [stderr] 172 | struct CPU {
[INFO] [stderr]     | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MemoryBus`
[INFO] [stderr]    --> src/main.rs:178:1
[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:243:1
[INFO] [stderr]     |
[INFO] [stderr] 243 | enum JumpTest {
[INFO] [stderr]     | ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `"docker" "inspect" "4efbd1192ed9052e69eb005356f7882b005b8a4d17b1045b7c2812993ca44379"`
[INFO] running `"docker" "rm" "-f" "4efbd1192ed9052e69eb005356f7882b005b8a4d17b1045b7c2812993ca44379"`
[INFO] [stdout] 4efbd1192ed9052e69eb005356f7882b005b8a4d17b1045b7c2812993ca44379
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/divyenduz/ferrous-boy:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 85f8d2dcf1e4b55d533967d14f0170b7e27e67f5736bfc5cb62e753655f3b7b4
[INFO] running `"docker" "start" "-a" "85f8d2dcf1e4b55d533967d14f0170b7e27e67f5736bfc5cb62e753655f3b7b4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ferrous_boy-99d5d7eb480dfc68
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "85f8d2dcf1e4b55d533967d14f0170b7e27e67f5736bfc5cb62e753655f3b7b4"`
[INFO] running `"docker" "rm" "-f" "85f8d2dcf1e4b55d533967d14f0170b7e27e67f5736bfc5cb62e753655f3b7b4"`
[INFO] [stdout] 85f8d2dcf1e4b55d533967d14f0170b7e27e67f5736bfc5cb62e753655f3b7b4