[INFO] updating cached repository XDMAN500/Rust-RomanNumerals
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/XDMAN500/Rust-RomanNumerals
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/XDMAN500/Rust-RomanNumerals" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/XDMAN500/Rust-RomanNumerals"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/XDMAN500/Rust-RomanNumerals'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/XDMAN500/Rust-RomanNumerals" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/XDMAN500/Rust-RomanNumerals"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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 master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of XDMAN500/Rust-RomanNumerals on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "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/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/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/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking XDMAN500/Rust-RomanNumerals against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-6/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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=forbid" "-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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a9954709c5a0487c95b06f6e23d77cd039773f548ee778461e65b8a89a68aef4
[INFO] running `"docker" "start" "-a" "a9954709c5a0487c95b06f6e23d77cd039773f548ee778461e65b8a89a68aef4"`
[INFO] [stderr]     Checking 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] 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 0.55s
[INFO] running `"docker" "inspect" "a9954709c5a0487c95b06f6e23d77cd039773f548ee778461e65b8a89a68aef4"`
[INFO] running `"docker" "rm" "-f" "a9954709c5a0487c95b06f6e23d77cd039773f548ee778461e65b8a89a68aef4"`
[INFO] [stdout] a9954709c5a0487c95b06f6e23d77cd039773f548ee778461e65b8a89a68aef4