[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-1.37-6/sources/1.36.0/gh/aleph-naught2tog/rust_exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/aleph-naught2tog/rust_exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aleph-naught2tog/rust_exercises" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aleph-naught2tog/rust_exercises"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of aleph-naught2tog/rust_exercises 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 aleph-naught2tog/rust_exercises
[INFO] finished frobbing aleph-naught2tog/rust_exercises
[INFO] frobbed toml for aleph-naught2tog/rust_exercises written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing aleph-naught2tog/rust_exercises 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-4/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/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] dca6285dbee7f5df7c77fa027bc026966a44281d9d432b889ed0b8d5cc9c492e
[INFO] running `"docker" "start" "-a" "dca6285dbee7f5df7c77fa027bc026966a44281d9d432b889ed0b8d5cc9c492e"`
[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 1.12s
[INFO] running `"docker" "inspect" "dca6285dbee7f5df7c77fa027bc026966a44281d9d432b889ed0b8d5cc9c492e"`
[INFO] running `"docker" "rm" "-f" "dca6285dbee7f5df7c77fa027bc026966a44281d9d432b889ed0b8d5cc9c492e"`
[INFO] [stdout] dca6285dbee7f5df7c77fa027bc026966a44281d9d432b889ed0b8d5cc9c492e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 44d7efeda776db69a50d9c98cb71a5b286bf607a8b945e1a5a5f25ba80f98297
[INFO] running `"docker" "start" "-a" "44d7efeda776db69a50d9c98cb71a5b286bf607a8b945e1a5a5f25ba80f98297"`
[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" "44d7efeda776db69a50d9c98cb71a5b286bf607a8b945e1a5a5f25ba80f98297"`
[INFO] running `"docker" "rm" "-f" "44d7efeda776db69a50d9c98cb71a5b286bf607a8b945e1a5a5f25ba80f98297"`
[INFO] [stdout] 44d7efeda776db69a50d9c98cb71a5b286bf607a8b945e1a5a5f25ba80f98297
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 66f8e2ec31a5da559203198e537808ca45f8e247ef0961f6378c2de2f938c51b
[INFO] running `"docker" "start" "-a" "66f8e2ec31a5da559203198e537808ca45f8e247ef0961f6378c2de2f938c51b"`
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 2 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exercises-2e7caa181c2bde28
[INFO] [stdout] test parser::tests::trim_rgb_doesnt_fail ... ok
[INFO] [stdout] test parser::tests::trim_rgb_hasrgb ... 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" "66f8e2ec31a5da559203198e537808ca45f8e247ef0961f6378c2de2f938c51b"`
[INFO] running `"docker" "rm" "-f" "66f8e2ec31a5da559203198e537808ca45f8e247ef0961f6378c2de2f938c51b"`
[INFO] [stdout] 66f8e2ec31a5da559203198e537808ca45f8e247ef0961f6378c2de2f938c51b