[INFO] updating cached repository learn-rust/guessing-game
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/learn-rust/guessing-game
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/learn-rust/guessing-game" "work/ex/beta-1.38-1/sources/1.37.0/gh/learn-rust/guessing-game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/learn-rust/guessing-game'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/learn-rust/guessing-game" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-rust/guessing-game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-rust/guessing-game'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9f7e85a12f889c3961e4288a46a2420ed97e738b
[INFO] sha for GitHub repo learn-rust/guessing-game: 9f7e85a12f889c3961e4288a46a2420ed97e738b
[INFO] validating manifest of learn-rust/guessing-game 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 learn-rust/guessing-game 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 learn-rust/guessing-game
[INFO] finished frobbing learn-rust/guessing-game
[INFO] frobbed toml for learn-rust/guessing-game written to work/ex/beta-1.38-1/sources/1.37.0/gh/learn-rust/guessing-game/Cargo.toml
[INFO] started frobbing learn-rust/guessing-game
[INFO] finished frobbing learn-rust/guessing-game
[INFO] frobbed toml for learn-rust/guessing-game written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-rust/guessing-game/Cargo.toml
[INFO] crate learn-rust/guessing-game 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 learn-rust/guessing-game 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/learn-rust/guessing-game:/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] 7f2af1820a324f6d079b1100acf5b030a539cfc71e41fa62a103b27eba74d677
[INFO] running `"docker" "start" "-a" "7f2af1820a324f6d079b1100acf5b030a539cfc71e41fa62a103b27eba74d677"`
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.72s
[INFO] running `"docker" "inspect" "7f2af1820a324f6d079b1100acf5b030a539cfc71e41fa62a103b27eba74d677"`
[INFO] running `"docker" "rm" "-f" "7f2af1820a324f6d079b1100acf5b030a539cfc71e41fa62a103b27eba74d677"`
[INFO] [stdout] 7f2af1820a324f6d079b1100acf5b030a539cfc71e41fa62a103b27eba74d677
[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/learn-rust/guessing-game:/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] 85a9c088f051f84a5c49a80766dcf3856d3f2ffcf21b5a8088c6c69f691870c3
[INFO] running `"docker" "start" "-a" "85a9c088f051f84a5c49a80766dcf3856d3f2ffcf21b5a8088c6c69f691870c3"`
[INFO] [stderr]    Compiling guessing_game v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `"docker" "inspect" "85a9c088f051f84a5c49a80766dcf3856d3f2ffcf21b5a8088c6c69f691870c3"`
[INFO] running `"docker" "rm" "-f" "85a9c088f051f84a5c49a80766dcf3856d3f2ffcf21b5a8088c6c69f691870c3"`
[INFO] [stdout] 85a9c088f051f84a5c49a80766dcf3856d3f2ffcf21b5a8088c6c69f691870c3
[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/learn-rust/guessing-game:/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] df3ec58bfe46f63d25f61ffa3049d7bcc7d14f69c70d7af08e3c59f9b9e03aea
[INFO] running `"docker" "start" "-a" "df3ec58bfe46f63d25f61ffa3049d7bcc7d14f69c70d7af08e3c59f9b9e03aea"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/guessing_game-9feda0ced712663b
[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" "df3ec58bfe46f63d25f61ffa3049d7bcc7d14f69c70d7af08e3c59f9b9e03aea"`
[INFO] running `"docker" "rm" "-f" "df3ec58bfe46f63d25f61ffa3049d7bcc7d14f69c70d7af08e3c59f9b9e03aea"`
[INFO] [stdout] df3ec58bfe46f63d25f61ffa3049d7bcc7d14f69c70d7af08e3c59f9b9e03aea