[INFO] updating cached repository ilja4/test_keygen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ilja4/test_keygen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ilja4/test_keygen" "work/ex/beta-1.38-1/sources/1.37.0/gh/ilja4/test_keygen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ilja4/test_keygen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ilja4/test_keygen" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ilja4/test_keygen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ilja4/test_keygen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 03a56ef7b1bef18cd40c2c4ed74f2afca9c97d16
[INFO] sha for GitHub repo ilja4/test_keygen: 03a56ef7b1bef18cd40c2c4ed74f2afca9c97d16
[INFO] validating manifest of ilja4/test_keygen 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 ilja4/test_keygen 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 ilja4/test_keygen
[INFO] finished frobbing ilja4/test_keygen
[INFO] frobbed toml for ilja4/test_keygen written to work/ex/beta-1.38-1/sources/1.37.0/gh/ilja4/test_keygen/Cargo.toml
[INFO] started frobbing ilja4/test_keygen
[INFO] finished frobbing ilja4/test_keygen
[INFO] frobbed toml for ilja4/test_keygen written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ilja4/test_keygen/Cargo.toml
[INFO] crate ilja4/test_keygen 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 ilja4/test_keygen 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ilja4/test_keygen:/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] c29865ad46453b07539e22489c01f734875b9bdf037aa955e82753d65b89d677
[INFO] running `"docker" "start" "-a" "c29865ad46453b07539e22489c01f734875b9bdf037aa955e82753d65b89d677"`
[INFO] [stderr]    Compiling cc v1.0.22
[INFO] [stderr]    Compiling openssl v0.10.11
[INFO] [stderr]    Compiling openssl-src v110.0.7+1.1.0i
[INFO] [stderr]    Compiling openssl-sys v0.9.35
[INFO] [stderr]    Compiling test_keygen v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     file.read_to_end(&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 2m 54s
[INFO] running `"docker" "inspect" "c29865ad46453b07539e22489c01f734875b9bdf037aa955e82753d65b89d677"`
[INFO] running `"docker" "rm" "-f" "c29865ad46453b07539e22489c01f734875b9bdf037aa955e82753d65b89d677"`
[INFO] [stdout] c29865ad46453b07539e22489c01f734875b9bdf037aa955e82753d65b89d677
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ilja4/test_keygen:/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] 89dea8d67e6028d590bc0af6ba33daf09a20baaaa0a60d861c78dde332d8e99b
[INFO] running `"docker" "start" "-a" "89dea8d67e6028d590bc0af6ba33daf09a20baaaa0a60d861c78dde332d8e99b"`
[INFO] [stderr]    Compiling test_keygen v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     file.read_to_end(&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 0.72s
[INFO] running `"docker" "inspect" "89dea8d67e6028d590bc0af6ba33daf09a20baaaa0a60d861c78dde332d8e99b"`
[INFO] running `"docker" "rm" "-f" "89dea8d67e6028d590bc0af6ba33daf09a20baaaa0a60d861c78dde332d8e99b"`
[INFO] [stdout] 89dea8d67e6028d590bc0af6ba33daf09a20baaaa0a60d861c78dde332d8e99b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ilja4/test_keygen:/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] 7366ea3c4d9d7058647b190123d736511ce9e45e448357486ca19e5cf8827dd0
[INFO] running `"docker" "start" "-a" "7366ea3c4d9d7058647b190123d736511ce9e45e448357486ca19e5cf8827dd0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/test_keygen-fa2e1a0c3f322bb0
[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" "7366ea3c4d9d7058647b190123d736511ce9e45e448357486ca19e5cf8827dd0"`
[INFO] running `"docker" "rm" "-f" "7366ea3c4d9d7058647b190123d736511ce9e45e448357486ca19e5cf8827dd0"`
[INFO] [stdout] 7366ea3c4d9d7058647b190123d736511ce9e45e448357486ca19e5cf8827dd0