[INFO] cloning repository XDMAN500/Rust-RomanNumerals
[INFO] running `"git" "clone" "--bare" "git://github.com/XDMAN500/Rust-RomanNumerals.git" "work/cache/sources/gh/XDMAN500/Rust-RomanNumerals"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/XDMAN500/Rust-RomanNumerals'...
[INFO] running `"git" "clone" "work/cache/sources/gh/XDMAN500/Rust-RomanNumerals" "work/ex/beta-1.37-6/sources/1.36.0/gh/XDMAN500/Rust-RomanNumerals"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/XDMAN500/Rust-RomanNumerals'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/XDMAN500/Rust-RomanNumerals" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/XDMAN500/Rust-RomanNumerals"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/XDMAN500/Rust-RomanNumerals'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 88eb1d2a1dbe778b320b7a4595a44ae19b600d2f
[INFO] sha for GitHub repo XDMAN500/Rust-RomanNumerals: 88eb1d2a1dbe778b320b7a4595a44ae19b600d2f
[INFO] validating manifest of XDMAN500/Rust-RomanNumerals on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of XDMAN500/Rust-RomanNumerals on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing XDMAN500/Rust-RomanNumerals
[INFO] finished frobbing XDMAN500/Rust-RomanNumerals
[INFO] frobbed toml for XDMAN500/Rust-RomanNumerals written to work/ex/beta-1.37-6/sources/1.36.0/gh/XDMAN500/Rust-RomanNumerals/Cargo.toml
[INFO] started frobbing XDMAN500/Rust-RomanNumerals
[INFO] finished frobbing XDMAN500/Rust-RomanNumerals
[INFO] frobbed toml for XDMAN500/Rust-RomanNumerals written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/XDMAN500/Rust-RomanNumerals/Cargo.toml
[INFO] crate XDMAN500/Rust-RomanNumerals already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing XDMAN500/Rust-RomanNumerals against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/XDMAN500/Rust-RomanNumerals:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] a459a860ef69aae24a66bb058d7da06e83d3614ca1c7061e8cca2bc594b54c43
[INFO] running `"docker" "start" "-a" "a459a860ef69aae24a66bb058d7da06e83d3614ca1c7061e8cca2bc594b54c43"`
[INFO] [stderr]    Compiling roman-numerals v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `from_decimal`
[INFO] [stderr]   --> src/roman_numerals.rs:24:3
[INFO] [stderr]    |
[INFO] [stderr] 24 |         fn from_decimal<'a>(num: i32) -> Option<&'a RomanDigit> {
[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" "a459a860ef69aae24a66bb058d7da06e83d3614ca1c7061e8cca2bc594b54c43"`
[INFO] running `"docker" "rm" "-f" "a459a860ef69aae24a66bb058d7da06e83d3614ca1c7061e8cca2bc594b54c43"`
[INFO] [stdout] a459a860ef69aae24a66bb058d7da06e83d3614ca1c7061e8cca2bc594b54c43
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/XDMAN500/Rust-RomanNumerals:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] d43c3e66691f8f383d5d0bbad12cbe481f27acded30702e7ae681d05b2dee744
[INFO] running `"docker" "start" "-a" "d43c3e66691f8f383d5d0bbad12cbe481f27acded30702e7ae681d05b2dee744"`
[INFO] [stderr]    Compiling roman-numerals v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `from_decimal`
[INFO] [stderr]   --> src/roman_numerals.rs:24:3
[INFO] [stderr]    |
[INFO] [stderr] 24 |         fn from_decimal<'a>(num: i32) -> Option<&'a RomanDigit> {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "d43c3e66691f8f383d5d0bbad12cbe481f27acded30702e7ae681d05b2dee744"`
[INFO] running `"docker" "rm" "-f" "d43c3e66691f8f383d5d0bbad12cbe481f27acded30702e7ae681d05b2dee744"`
[INFO] [stdout] d43c3e66691f8f383d5d0bbad12cbe481f27acded30702e7ae681d05b2dee744
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/XDMAN500/Rust-RomanNumerals:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 76b9149a9605c9bcf94afedacd679edfc06582f726ca430b5c43be632bd92cc8
[INFO] running `"docker" "start" "-a" "76b9149a9605c9bcf94afedacd679edfc06582f726ca430b5c43be632bd92cc8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/roman_numerals-1f71ad291c6136de
[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" "76b9149a9605c9bcf94afedacd679edfc06582f726ca430b5c43be632bd92cc8"`
[INFO] running `"docker" "rm" "-f" "76b9149a9605c9bcf94afedacd679edfc06582f726ca430b5c43be632bd92cc8"`
[INFO] [stdout] 76b9149a9605c9bcf94afedacd679edfc06582f726ca430b5c43be632bd92cc8