[INFO] updating cached repository aleph-naught2tog/rust_exercises
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/aleph-naught2tog/rust_exercises
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/aleph-naught2tog/rust_exercises" "work/ex/beta-1.38-1/sources/1.37.0/gh/aleph-naught2tog/rust_exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/aleph-naught2tog/rust_exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aleph-naught2tog/rust_exercises" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aleph-naught2tog/rust_exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aleph-naught2tog/rust_exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4c595198a84b111baf86c5b36d3b0ec1a2c958ff
[INFO] sha for GitHub repo aleph-naught2tog/rust_exercises: 4c595198a84b111baf86c5b36d3b0ec1a2c958ff
[INFO] validating manifest of aleph-naught2tog/rust_exercises 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 aleph-naught2tog/rust_exercises 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 aleph-naught2tog/rust_exercises
[INFO] finished frobbing aleph-naught2tog/rust_exercises
[INFO] frobbed toml for aleph-naught2tog/rust_exercises written to work/ex/beta-1.38-1/sources/1.37.0/gh/aleph-naught2tog/rust_exercises/Cargo.toml
[INFO] started frobbing aleph-naught2tog/rust_exercises
[INFO] finished frobbing aleph-naught2tog/rust_exercises
[INFO] frobbed toml for aleph-naught2tog/rust_exercises written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/aleph-naught2tog/rust_exercises/Cargo.toml
[INFO] crate aleph-naught2tog/rust_exercises 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 aleph-naught2tog/rust_exercises 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/aleph-naught2tog/rust_exercises:/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] 83aaa8607155151d22757d950159ed9be27944a6798c25c7276798a81831a7ff
[INFO] running `"docker" "start" "-a" "83aaa8607155151d22757d950159ed9be27944a6798c25c7276798a81831a7ff"`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/parser.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::trim_rgb`
[INFO] [stderr]   --> src/parser.rs:73:7
[INFO] [stderr]    |
[INFO] [stderr] 73 |   use super::trim_rgb;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `"docker" "inspect" "83aaa8607155151d22757d950159ed9be27944a6798c25c7276798a81831a7ff"`
[INFO] running `"docker" "rm" "-f" "83aaa8607155151d22757d950159ed9be27944a6798c25c7276798a81831a7ff"`
[INFO] [stdout] 83aaa8607155151d22757d950159ed9be27944a6798c25c7276798a81831a7ff
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/aleph-naught2tog/rust_exercises:/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] 47e034d6cc3dc4c20a2c58e5f5b8fcf72c5c625b8d4bde63b581ab7d37ac2b06
[INFO] running `"docker" "start" "-a" "47e034d6cc3dc4c20a2c58e5f5b8fcf72c5c625b8d4bde63b581ab7d37ac2b06"`
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/parser.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "47e034d6cc3dc4c20a2c58e5f5b8fcf72c5c625b8d4bde63b581ab7d37ac2b06"`
[INFO] running `"docker" "rm" "-f" "47e034d6cc3dc4c20a2c58e5f5b8fcf72c5c625b8d4bde63b581ab7d37ac2b06"`
[INFO] [stdout] 47e034d6cc3dc4c20a2c58e5f5b8fcf72c5c625b8d4bde63b581ab7d37ac2b06
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/aleph-naught2tog/rust_exercises:/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] d9d3a770a8e65ed9ca25595e8301b2eb26b23df20e712d4f7c45e176a6f894c4
[INFO] running `"docker" "start" "-a" "d9d3a770a8e65ed9ca25595e8301b2eb26b23df20e712d4f7c45e176a6f894c4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exercises-8016f77199655618
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test parser::tests::trim_rgb_hasrgb ... ok
[INFO] [stdout] test parser::tests::trim_rgb_doesnt_fail ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d9d3a770a8e65ed9ca25595e8301b2eb26b23df20e712d4f7c45e176a6f894c4"`
[INFO] running `"docker" "rm" "-f" "d9d3a770a8e65ed9ca25595e8301b2eb26b23df20e712d4f7c45e176a6f894c4"`
[INFO] [stdout] d9d3a770a8e65ed9ca25595e8301b2eb26b23df20e712d4f7c45e176a6f894c4