[INFO] updating cached repository tylanphear/gbrust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tylanphear/gbrust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tylanphear/gbrust" "work/ex/beta-1.38-1/sources/1.37.0/gh/tylanphear/gbrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tylanphear/gbrust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tylanphear/gbrust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tylanphear/gbrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tylanphear/gbrust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 585994d29742d7ebb403434ebee7ff369789c031
[INFO] sha for GitHub repo tylanphear/gbrust: 585994d29742d7ebb403434ebee7ff369789c031
[INFO] validating manifest of tylanphear/gbrust 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 tylanphear/gbrust 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 tylanphear/gbrust
[INFO] finished frobbing tylanphear/gbrust
[INFO] frobbed toml for tylanphear/gbrust written to work/ex/beta-1.38-1/sources/1.37.0/gh/tylanphear/gbrust/Cargo.toml
[INFO] started frobbing tylanphear/gbrust
[INFO] finished frobbing tylanphear/gbrust
[INFO] frobbed toml for tylanphear/gbrust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tylanphear/gbrust/Cargo.toml
[INFO] crate tylanphear/gbrust 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 tylanphear/gbrust against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tylanphear/gbrust:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 76f64d348a2337178087bd44a2e9a64944062cc9f72bfe920be9a5daff1e5094
[INFO] running `"docker" "start" "-a" "76f64d348a2337178087bd44a2e9a64944062cc9f72bfe920be9a5daff1e5094"`
[INFO] [stderr]    Compiling gbrust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `CPU`
[INFO] [stderr]  --> src/cpu.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct CPU {
[INFO] [stderr]   | ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/cpu.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tick`
[INFO] [stderr]   --> src/cpu.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn tick(&mut self, time: u8) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `update_clock`
[INFO] [stderr]   --> src/cpu.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn update_clock(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `and`
[INFO] [stderr]   --> src/cpu.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn and(&mut self, register: R8) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `or`
[INFO] [stderr]   --> src/cpu.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn or(&mut self, register: R8) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fetch8`
[INFO] [stderr]   --> src/cpu.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn fetch8(&self, register: R8) -> u8 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fetch16`
[INFO] [stderr]   --> src/cpu.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn fetch16(&self, register: R16) -> u16 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set8`
[INFO] [stderr]   --> src/cpu.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn set8(&mut self, register: R8, value: u8) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set16`
[INFO] [stderr]    --> src/cpu.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn set16(&mut self, register: R16, value: u16) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load`
[INFO] [stderr]    --> src/cpu.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     pub fn load(&mut self, to: R8, from: R8) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add8`
[INFO] [stderr]    --> src/cpu.rs:138:5
[INFO] [stderr]     |
[INFO] [stderr] 138 |     pub fn add8(&mut self, fst: R8, snd: R8) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Clock`
[INFO] [stderr]    --> src/cpu.rs:153:1
[INFO] [stderr]     |
[INFO] [stderr] 153 | struct Clock {
[INFO] [stderr]     | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Flags`
[INFO] [stderr]    --> src/cpu.rs:158:1
[INFO] [stderr]     |
[INFO] [stderr] 158 | struct Flags {
[INFO] [stderr]     | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u8s_to_u16`
[INFO] [stderr]    --> src/cpu.rs:164:1
[INFO] [stderr]     |
[INFO] [stderr] 164 | pub fn u8s_to_u16(high: u8, low: u8) -> u16 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u16_to_u8s`
[INFO] [stderr]    --> src/cpu.rs:169:1
[INFO] [stderr]     |
[INFO] [stderr] 169 | pub fn u16_to_u8s(wbyte: u16) -> (u8, u8) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `A`
[INFO] [stderr]    --> src/cpu.rs:175:5
[INFO] [stderr]     |
[INFO] [stderr] 175 |     A,
[INFO] [stderr]     |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `B`
[INFO] [stderr]    --> src/cpu.rs:176:5
[INFO] [stderr]     |
[INFO] [stderr] 176 |     B,
[INFO] [stderr]     |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `C`
[INFO] [stderr]    --> src/cpu.rs:177:5
[INFO] [stderr]     |
[INFO] [stderr] 177 |     C,
[INFO] [stderr]     |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `D`
[INFO] [stderr]    --> src/cpu.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     D,
[INFO] [stderr]     |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `E`
[INFO] [stderr]    --> src/cpu.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     E,
[INFO] [stderr]     |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `H`
[INFO] [stderr]    --> src/cpu.rs:180:5
[INFO] [stderr]     |
[INFO] [stderr] 180 |     H,
[INFO] [stderr]     |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `L`
[INFO] [stderr]    --> src/cpu.rs:181:5
[INFO] [stderr]     |
[INFO] [stderr] 181 |     L,
[INFO] [stderr]     |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CONST`
[INFO] [stderr]    --> src/cpu.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     CONST(u8)
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `registers`
[INFO] [stderr]    --> src/cpu.rs:187:5
[INFO] [stderr]     |
[INFO] [stderr] 187 |     pub fn registers() -> Iter<'static, R8> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `REGISTERS`
[INFO] [stderr]    --> src/cpu.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |         static REGISTERS: [R8; 7] = [R8::A, R8::B, R8::C, R8::D, R8::E, R8::H, R8::L];
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PC`
[INFO] [stderr]    --> src/cpu.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 |     PC,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SP`
[INFO] [stderr]    --> src/cpu.rs:196:5
[INFO] [stderr]     |
[INFO] [stderr] 196 |     SP,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BC`
[INFO] [stderr]    --> src/cpu.rs:197:5
[INFO] [stderr]     |
[INFO] [stderr] 197 |     BC,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DE`
[INFO] [stderr]    --> src/cpu.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     DE,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `HL`
[INFO] [stderr]    --> src/cpu.rs:199:5
[INFO] [stderr]     |
[INFO] [stderr] 199 |     HL,
[INFO] [stderr]     |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CONST`
[INFO] [stderr]    --> src/cpu.rs:200:5
[INFO] [stderr]     |
[INFO] [stderr] 200 |     CONST(u16)
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `registers`
[INFO] [stderr]    --> src/cpu.rs:204:5
[INFO] [stderr]     |
[INFO] [stderr] 204 |     pub fn registers() -> Iter<'static, R16> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `REGISTERS`
[INFO] [stderr]    --> src/cpu.rs:205:9
[INFO] [stderr]     |
[INFO] [stderr] 205 |         static REGISTERS: [R16; 5] = [R16::PC, R16::SP, R16::BC, R16::DE, R16::HL];
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `detect_half_carry`
[INFO] [stderr]    --> src/cpu.rs:210:1
[INFO] [stderr]     |
[INFO] [stderr] 210 | fn detect_half_carry(fst: u8, snd: u8) -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "76f64d348a2337178087bd44a2e9a64944062cc9f72bfe920be9a5daff1e5094"`
[INFO] running `"docker" "rm" "-f" "76f64d348a2337178087bd44a2e9a64944062cc9f72bfe920be9a5daff1e5094"`
[INFO] [stdout] 76f64d348a2337178087bd44a2e9a64944062cc9f72bfe920be9a5daff1e5094
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tylanphear/gbrust:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 8cd25321415c304443fedd9cc41bfbf2cb5cb3b0fd21c75177b70d2ac44535db
[INFO] running `"docker" "start" "-a" "8cd25321415c304443fedd9cc41bfbf2cb5cb3b0fd21c75177b70d2ac44535db"`
[INFO] [stderr]    Compiling gbrust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::u16::MAX as MAX16`
[INFO] [stderr]    --> src/cpu.rs:379:13
[INFO] [stderr]     |
[INFO] [stderr] 379 |         use std::u16::MAX as MAX16;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `and`
[INFO] [stderr]   --> src/cpu.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn and(&mut self, register: R8) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `or`
[INFO] [stderr]   --> src/cpu.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn or(&mut self, register: R8) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CONST`
[INFO] [stderr]    --> src/cpu.rs:200:5
[INFO] [stderr]     |
[INFO] [stderr] 200 |     CONST(u16)
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `"docker" "inspect" "8cd25321415c304443fedd9cc41bfbf2cb5cb3b0fd21c75177b70d2ac44535db"`
[INFO] running `"docker" "rm" "-f" "8cd25321415c304443fedd9cc41bfbf2cb5cb3b0fd21c75177b70d2ac44535db"`
[INFO] [stdout] 8cd25321415c304443fedd9cc41bfbf2cb5cb3b0fd21c75177b70d2ac44535db
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tylanphear/gbrust:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 147d32fa744ba24f8db7d897d4c2e5b8066e15a6296aa40602dc0216c2e7219b
[INFO] running `"docker" "start" "-a" "147d32fa744ba24f8db7d897d4c2e5b8066e15a6296aa40602dc0216c2e7219b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/gbrust-aa338d977417875f
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test cpu::test::cpu_can_add_constants_to_registers ... ok
[INFO] [stdout] test cpu::test::cpu_can_fetch_and_set_8bit_registers ... ok
[INFO] [stdout] test cpu::test::cpu_can_tick ... ok
[INFO] [stdout] test cpu::test::u16_splitting_and_combining_rational ... ok
[INFO] [stdout] test cpu::test::u8_combining_and_splitting_rational ... ok
[INFO] [stdout] test cpu::test::cpu_can_fetch_and_set_16bit_registers ... ok
[INFO] [stdout] test cpu::test::can_detect_half_carry ... ok
[INFO] [stdout] test cpu::test::cpu_can_add_8_bit_registers ... ok
[INFO] [stdout] test cpu::test::cpu_can_load_registers_to_registers ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "147d32fa744ba24f8db7d897d4c2e5b8066e15a6296aa40602dc0216c2e7219b"`
[INFO] running `"docker" "rm" "-f" "147d32fa744ba24f8db7d897d4c2e5b8066e15a6296aa40602dc0216c2e7219b"`
[INFO] [stdout] 147d32fa744ba24f8db7d897d4c2e5b8066e15a6296aa40602dc0216c2e7219b