[INFO] updating cached repository athaeryn/impsort
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/athaeryn/impsort
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/athaeryn/impsort" "work/ex/beta-1.38-1/sources/1.37.0/gh/athaeryn/impsort"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/athaeryn/impsort'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/athaeryn/impsort" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/athaeryn/impsort"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/athaeryn/impsort'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9945c2723619c5c711e52e9b832000cf02624c6c
[INFO] sha for GitHub repo athaeryn/impsort: 9945c2723619c5c711e52e9b832000cf02624c6c
[INFO] validating manifest of athaeryn/impsort 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 athaeryn/impsort 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 athaeryn/impsort
[INFO] finished frobbing athaeryn/impsort
[INFO] frobbed toml for athaeryn/impsort written to work/ex/beta-1.38-1/sources/1.37.0/gh/athaeryn/impsort/Cargo.toml
[INFO] started frobbing athaeryn/impsort
[INFO] finished frobbing athaeryn/impsort
[INFO] frobbed toml for athaeryn/impsort written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/athaeryn/impsort/Cargo.toml
[INFO] crate athaeryn/impsort 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 athaeryn/impsort 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-3/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/athaeryn/impsort:/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] f781a79c147991cb12a4828ef61d23272a6524ac1e0f10f0b0764fce870d5ea4
[INFO] running `"docker" "start" "-a" "f781a79c147991cb12a4828ef61d23272a6524ac1e0f10f0b0764fce870d5ea4"`
[INFO] [stderr]    Compiling impsort v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     io::stdin().read_to_string(&mut buffer);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `"docker" "inspect" "f781a79c147991cb12a4828ef61d23272a6524ac1e0f10f0b0764fce870d5ea4"`
[INFO] running `"docker" "rm" "-f" "f781a79c147991cb12a4828ef61d23272a6524ac1e0f10f0b0764fce870d5ea4"`
[INFO] [stdout] f781a79c147991cb12a4828ef61d23272a6524ac1e0f10f0b0764fce870d5ea4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/athaeryn/impsort:/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] ac0a4484a4f276a9f208174f76dd63ea21ae7ca977ac2e323d8adc0658619680
[INFO] running `"docker" "start" "-a" "ac0a4484a4f276a9f208174f76dd63ea21ae7ca977ac2e323d8adc0658619680"`
[INFO] [stderr]    Compiling impsort v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     io::stdin().read_to_string(&mut buffer);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "ac0a4484a4f276a9f208174f76dd63ea21ae7ca977ac2e323d8adc0658619680"`
[INFO] running `"docker" "rm" "-f" "ac0a4484a4f276a9f208174f76dd63ea21ae7ca977ac2e323d8adc0658619680"`
[INFO] [stdout] ac0a4484a4f276a9f208174f76dd63ea21ae7ca977ac2e323d8adc0658619680
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/athaeryn/impsort:/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] bf1c3b71fce83a3a7fd6e08f2e97f14042be9562000f6015844dd700b9f1082f
[INFO] running `"docker" "start" "-a" "bf1c3b71fce83a3a7fd6e08f2e97f14042be9562000f6015844dd700b9f1082f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/impsort-acee8ab1b6f4d51e
[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" "bf1c3b71fce83a3a7fd6e08f2e97f14042be9562000f6015844dd700b9f1082f"`
[INFO] running `"docker" "rm" "-f" "bf1c3b71fce83a3a7fd6e08f2e97f14042be9562000f6015844dd700b9f1082f"`
[INFO] [stdout] bf1c3b71fce83a3a7fd6e08f2e97f14042be9562000f6015844dd700b9f1082f