[INFO] updating cached repository michaelsergio/chip8-disassembler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/michaelsergio/chip8-disassembler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/michaelsergio/chip8-disassembler" "work/ex/beta-1.38-1/sources/1.37.0/gh/michaelsergio/chip8-disassembler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/michaelsergio/chip8-disassembler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/michaelsergio/chip8-disassembler" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/michaelsergio/chip8-disassembler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/michaelsergio/chip8-disassembler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0788eb177d99555757e6fe836a2ce19005c2158e
[INFO] sha for GitHub repo michaelsergio/chip8-disassembler: 0788eb177d99555757e6fe836a2ce19005c2158e
[INFO] validating manifest of michaelsergio/chip8-disassembler 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 michaelsergio/chip8-disassembler 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 michaelsergio/chip8-disassembler
[INFO] finished frobbing michaelsergio/chip8-disassembler
[INFO] frobbed toml for michaelsergio/chip8-disassembler written to work/ex/beta-1.38-1/sources/1.37.0/gh/michaelsergio/chip8-disassembler/Cargo.toml
[INFO] started frobbing michaelsergio/chip8-disassembler
[INFO] finished frobbing michaelsergio/chip8-disassembler
[INFO] frobbed toml for michaelsergio/chip8-disassembler written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/michaelsergio/chip8-disassembler/Cargo.toml
[INFO] crate michaelsergio/chip8-disassembler 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 michaelsergio/chip8-disassembler 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-2/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/michaelsergio/chip8-disassembler:/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] e961ac2b24a237795d18c4b7d6d619d3faf620856971e6d6d4473e147dbf8365
[INFO] running `"docker" "start" "-a" "e961ac2b24a237795d18c4b7d6d619d3faf620856971e6d6d4473e147dbf8365"`
[INFO] [stderr]    Compiling chip8-disassemble v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `decode_op`
[INFO] [stderr]   --> src/main.rs:90:1
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn decode_op(opcode: u8) -> &'static str {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "e961ac2b24a237795d18c4b7d6d619d3faf620856971e6d6d4473e147dbf8365"`
[INFO] running `"docker" "rm" "-f" "e961ac2b24a237795d18c4b7d6d619d3faf620856971e6d6d4473e147dbf8365"`
[INFO] [stdout] e961ac2b24a237795d18c4b7d6d619d3faf620856971e6d6d4473e147dbf8365
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/michaelsergio/chip8-disassembler:/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] e6017773572138064bb38dd8d7d8d9033f3da273c709c5647a6aff90cbcec782
[INFO] running `"docker" "start" "-a" "e6017773572138064bb38dd8d7d8d9033f3da273c709c5647a6aff90cbcec782"`
[INFO] [stderr]    Compiling chip8-disassemble v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `decode_op`
[INFO] [stderr]   --> src/main.rs:90:1
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn decode_op(opcode: u8) -> &'static str {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "e6017773572138064bb38dd8d7d8d9033f3da273c709c5647a6aff90cbcec782"`
[INFO] running `"docker" "rm" "-f" "e6017773572138064bb38dd8d7d8d9033f3da273c709c5647a6aff90cbcec782"`
[INFO] [stdout] e6017773572138064bb38dd8d7d8d9033f3da273c709c5647a6aff90cbcec782
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/michaelsergio/chip8-disassembler:/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] 014ae6ac7937eb483f24ead1369fc347692b93187f3a68a61060ce5630da504d
[INFO] running `"docker" "start" "-a" "014ae6ac7937eb483f24ead1369fc347692b93187f3a68a61060ce5630da504d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chip8_disassemble-bee52e70a144da53
[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" "014ae6ac7937eb483f24ead1369fc347692b93187f3a68a61060ce5630da504d"`
[INFO] running `"docker" "rm" "-f" "014ae6ac7937eb483f24ead1369fc347692b93187f3a68a61060ce5630da504d"`
[INFO] [stdout] 014ae6ac7937eb483f24ead1369fc347692b93187f3a68a61060ce5630da504d