[INFO] updating cached repository VoxWave/Introduction_to_AI_2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/VoxWave/Introduction_to_AI_2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/VoxWave/Introduction_to_AI_2018" "work/ex/beta-1.38-1/sources/1.37.0/gh/VoxWave/Introduction_to_AI_2018"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/VoxWave/Introduction_to_AI_2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/VoxWave/Introduction_to_AI_2018" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/VoxWave/Introduction_to_AI_2018"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/VoxWave/Introduction_to_AI_2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a338fcb647cc10682a5da4c02f19cb1a0da6749a
[INFO] sha for GitHub repo VoxWave/Introduction_to_AI_2018: a338fcb647cc10682a5da4c02f19cb1a0da6749a
[INFO] validating manifest of VoxWave/Introduction_to_AI_2018 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 VoxWave/Introduction_to_AI_2018 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 VoxWave/Introduction_to_AI_2018
[INFO] finished frobbing VoxWave/Introduction_to_AI_2018
[INFO] frobbed toml for VoxWave/Introduction_to_AI_2018 written to work/ex/beta-1.38-1/sources/1.37.0/gh/VoxWave/Introduction_to_AI_2018/Cargo.toml
[INFO] started frobbing VoxWave/Introduction_to_AI_2018
[INFO] finished frobbing VoxWave/Introduction_to_AI_2018
[INFO] frobbed toml for VoxWave/Introduction_to_AI_2018 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/VoxWave/Introduction_to_AI_2018/Cargo.toml
[INFO] crate VoxWave/Introduction_to_AI_2018 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 VoxWave/Introduction_to_AI_2018 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-4/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/VoxWave/Introduction_to_AI_2018:/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] 80630397939d2ba04ee020bc9a56533c348d50ab318d7fef4fe319c971cacb3b
[INFO] running `"docker" "start" "-a" "80630397939d2ba04ee020bc9a56533c348d50ab318d7fef4fe319c971cacb3b"`
[INFO] [stderr]    Compiling serde v1.0.78
[INFO] [stderr]    Compiling syn v0.15.3
[INFO] [stderr]    Compiling serde_derive v1.0.78
[INFO] [stderr]    Compiling serde_json v1.0.27
[INFO] [stderr]    Compiling ai_kurssi v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | 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 36.78s
[INFO] running `"docker" "inspect" "80630397939d2ba04ee020bc9a56533c348d50ab318d7fef4fe319c971cacb3b"`
[INFO] running `"docker" "rm" "-f" "80630397939d2ba04ee020bc9a56533c348d50ab318d7fef4fe319c971cacb3b"`
[INFO] [stdout] 80630397939d2ba04ee020bc9a56533c348d50ab318d7fef4fe319c971cacb3b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/VoxWave/Introduction_to_AI_2018:/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] 1364ba1a38d6ea481a6f548a4e698c260d927646d995bcbe3e7811dbe380f9d5
[INFO] running `"docker" "start" "-a" "1364ba1a38d6ea481a6f548a4e698c260d927646d995bcbe3e7811dbe380f9d5"`
[INFO] [stderr]    Compiling ai_kurssi v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | 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 0.83s
[INFO] running `"docker" "inspect" "1364ba1a38d6ea481a6f548a4e698c260d927646d995bcbe3e7811dbe380f9d5"`
[INFO] running `"docker" "rm" "-f" "1364ba1a38d6ea481a6f548a4e698c260d927646d995bcbe3e7811dbe380f9d5"`
[INFO] [stdout] 1364ba1a38d6ea481a6f548a4e698c260d927646d995bcbe3e7811dbe380f9d5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/VoxWave/Introduction_to_AI_2018:/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] d09bffd005d639e75687ee599af2f732067379d1d69d25bad4391d729fd7a19d
[INFO] running `"docker" "start" "-a" "d09bffd005d639e75687ee599af2f732067379d1d69d25bad4391d729fd7a19d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ai_kurssi-7638c4eeb6d6500f
[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" "d09bffd005d639e75687ee599af2f732067379d1d69d25bad4391d729fd7a19d"`
[INFO] running `"docker" "rm" "-f" "d09bffd005d639e75687ee599af2f732067379d1d69d25bad4391d729fd7a19d"`
[INFO] [stdout] d09bffd005d639e75687ee599af2f732067379d1d69d25bad4391d729fd7a19d