[INFO] updating cached repository btwotwo/chip8rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/btwotwo/chip8rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/btwotwo/chip8rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/btwotwo/chip8rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/btwotwo/chip8rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/btwotwo/chip8rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/btwotwo/chip8rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/btwotwo/chip8rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0a50fe6cbca722099a66614eb57a7e703449e018
[INFO] sha for GitHub repo btwotwo/chip8rust: 0a50fe6cbca722099a66614eb57a7e703449e018
[INFO] validating manifest of btwotwo/chip8rust 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 btwotwo/chip8rust 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 btwotwo/chip8rust
[INFO] finished frobbing btwotwo/chip8rust
[INFO] frobbed toml for btwotwo/chip8rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/btwotwo/chip8rust/Cargo.toml
[INFO] started frobbing btwotwo/chip8rust
[INFO] finished frobbing btwotwo/chip8rust
[INFO] frobbed toml for btwotwo/chip8rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/btwotwo/chip8rust/Cargo.toml
[INFO] crate btwotwo/chip8rust 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 btwotwo/chip8rust 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/btwotwo/chip8rust:/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] ac707f4d53949de43b3fdaca9adce2c6ad1f08f93f4c091b9a1016fa93bc6a09
[INFO] running `"docker" "start" "-a" "ac707f4d53949de43b3fdaca9adce2c6ad1f08f93f4c091b9a1016fa93bc6a09"`
[INFO] [stderr]    Compiling chip8rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `register_index`
[INFO] [stderr]   --> src/opcode/mod.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let register_index = (opcode & 0x0f00) >> 8;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_register_index`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `OpcodeImpl`
[INFO] [stderr]   --> src/opcode/mod.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | type OpcodeImpl = fn(Opcode, &mut Chip) -> ();
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `OpcodeHandler`
[INFO] [stderr]   --> src/opcode/mod.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | struct OpcodeHandler {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/opcode/mod.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn new() -> OpcodeHandler {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ret`
[INFO] [stderr]   --> src/opcode/mod.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn ret(_: Opcode, chip: &mut Chip) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `jp`
[INFO] [stderr]   --> src/opcode/mod.rs:56:1
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn jp(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `call`
[INFO] [stderr]   --> src/opcode/mod.rs:61:1
[INFO] [stderr]    |
[INFO] [stderr] 61 | fn call(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `se`
[INFO] [stderr]   --> src/opcode/mod.rs:68:1
[INFO] [stderr]    |
[INFO] [stderr] 68 | fn se(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sne`
[INFO] [stderr]   --> src/opcode/mod.rs:81:1
[INFO] [stderr]    |
[INFO] [stderr] 81 | fn sne(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sre`
[INFO] [stderr]   --> src/opcode/mod.rs:93:1
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn sre(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ld`
[INFO] [stderr]    --> src/opcode/mod.rs:105:1
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn ld(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add`
[INFO] [stderr]    --> src/opcode/mod.rs:111:1
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn add(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ldr`
[INFO] [stderr]    --> src/opcode/mod.rs:118:1
[INFO] [stderr]     |
[INFO] [stderr] 118 | fn ldr(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `or`
[INFO] [stderr]    --> src/opcode/mod.rs:124:1
[INFO] [stderr]     |
[INFO] [stderr] 124 | fn or(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `and`
[INFO] [stderr]    --> src/opcode/mod.rs:130:1
[INFO] [stderr]     |
[INFO] [stderr] 130 | fn and(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `xor`
[INFO] [stderr]    --> src/opcode/mod.rs:136:1
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn xor(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `addreg`
[INFO] [stderr]    --> src/opcode/mod.rs:142:1
[INFO] [stderr]     |
[INFO] [stderr] 142 | fn addreg(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `subreg`
[INFO] [stderr]    --> src/opcode/mod.rs:154:1
[INFO] [stderr]     |
[INFO] [stderr] 154 | fn subreg(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `shiftr`
[INFO] [stderr]    --> src/opcode/mod.rs:164:1
[INFO] [stderr]     |
[INFO] [stderr] 164 | fn shiftr(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sub`
[INFO] [stderr]    --> src/opcode/mod.rs:170:1
[INFO] [stderr]     |
[INFO] [stderr] 170 | fn sub(opcode: Opcode, chip: &mut Chip) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_opcode`
[INFO] [stderr]   --> src/main.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     current_opcode: Opcode,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `screen`
[INFO] [stderr]   --> src/main.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     screen: [bool; 64 * 32], //maybe enum?
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `emulate_cycle`
[INFO] [stderr]   --> src/main.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     fn emulate_cycle(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_opcode`
[INFO] [stderr]   --> src/main.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     fn set_opcode(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "ac707f4d53949de43b3fdaca9adce2c6ad1f08f93f4c091b9a1016fa93bc6a09"`
[INFO] running `"docker" "rm" "-f" "ac707f4d53949de43b3fdaca9adce2c6ad1f08f93f4c091b9a1016fa93bc6a09"`
[INFO] [stdout] ac707f4d53949de43b3fdaca9adce2c6ad1f08f93f4c091b9a1016fa93bc6a09
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/btwotwo/chip8rust:/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] db9540909f989eff9e1241f554be0036447607f41f5d9cc35983644129abe98a
[INFO] running `"docker" "start" "-a" "db9540909f989eff9e1241f554be0036447607f41f5d9cc35983644129abe98a"`
[INFO] [stderr]    Compiling chip8rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `register_index`
[INFO] [stderr]   --> src/opcode/mod.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let register_index = (opcode & 0x0f00) >> 8;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_register_index`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `opcode`
[INFO] [stderr]   --> src/opcode/test.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let opcode = 0x2DEA;
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_opcode`
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `OpcodeImpl`
[INFO] [stderr]   --> src/opcode/mod.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | type OpcodeImpl = fn(Opcode, &mut Chip) -> ();
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `OpcodeHandler`
[INFO] [stderr]   --> src/opcode/mod.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | struct OpcodeHandler {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/opcode/mod.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn new() -> OpcodeHandler {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_opcode`
[INFO] [stderr]   --> src/main.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     current_opcode: Opcode,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `screen`
[INFO] [stderr]   --> src/main.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     screen: [bool; 64 * 32], //maybe enum?
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `emulate_cycle`
[INFO] [stderr]   --> src/main.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     fn emulate_cycle(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_opcode`
[INFO] [stderr]   --> src/main.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     fn set_opcode(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "db9540909f989eff9e1241f554be0036447607f41f5d9cc35983644129abe98a"`
[INFO] running `"docker" "rm" "-f" "db9540909f989eff9e1241f554be0036447607f41f5d9cc35983644129abe98a"`
[INFO] [stdout] db9540909f989eff9e1241f554be0036447607f41f5d9cc35983644129abe98a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/btwotwo/chip8rust:/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] 6cbdc9d6e4dabfb1e5f68ad2fd14f056e9551d8bdfc6d04de82fc1b203eb7e81
[INFO] running `"docker" "start" "-a" "6cbdc9d6e4dabfb1e5f68ad2fd14f056e9551d8bdfc6d04de82fc1b203eb7e81"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chip8rust-c3c1ff8f6879e974
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test opcode::test::addreg_carry_test ... ok
[INFO] [stdout] test opcode::test::add_overflow_test ... ok
[INFO] [stdout] test opcode::test::addreg_test ... ok
[INFO] [stdout] test opcode::test::add_test ... ok
[INFO] [stdout] test opcode::test::ld_test ... ok
[INFO] [stdout] test opcode::test::or_test ... ok
[INFO] [stdout] test opcode::test::ret_test ... ok
[INFO] [stdout] test opcode::test::and_test ... ok
[INFO] [stdout] test opcode::test::sne_test ... ok
[INFO] [stdout] test opcode::test::sre_test ... ok
[INFO] [stdout] test opcode::test::shiftr_test ... ok
[INFO] [stdout] test opcode::test::call_test ... ok
[INFO] [stdout] test opcode::test::jp_test ... ok
[INFO] [stdout] test opcode::test::ldr_test ... ok
[INFO] [stdout] test opcode::test::subreg_carry_test ... ok
[INFO] [stdout] test opcode::test::sub_test_overflow ... ok
[INFO] [stdout] test opcode::test::subreg_test ... ok
[INFO] [stdout] test opcode::test::se_test ... ok
[INFO] [stdout] test opcode::test::sub_test ... ok
[INFO] [stdout] test opcode::test::xor_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6cbdc9d6e4dabfb1e5f68ad2fd14f056e9551d8bdfc6d04de82fc1b203eb7e81"`
[INFO] running `"docker" "rm" "-f" "6cbdc9d6e4dabfb1e5f68ad2fd14f056e9551d8bdfc6d04de82fc1b203eb7e81"`
[INFO] [stdout] 6cbdc9d6e4dabfb1e5f68ad2fd14f056e9551d8bdfc6d04de82fc1b203eb7e81