[INFO] updating cached repository PlasmaPower/random-walk
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/PlasmaPower/random-walk
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/PlasmaPower/random-walk" "work/ex/beta-1.37-6/sources/1.36.0/gh/PlasmaPower/random-walk"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/PlasmaPower/random-walk'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/PlasmaPower/random-walk" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/PlasmaPower/random-walk"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/PlasmaPower/random-walk'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4c3be3cb2aee6f580185c50dbbc60c3aabe38750
[INFO] sha for GitHub repo PlasmaPower/random-walk: 4c3be3cb2aee6f580185c50dbbc60c3aabe38750
[INFO] validating manifest of PlasmaPower/random-walk 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 PlasmaPower/random-walk 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 PlasmaPower/random-walk
[INFO] finished frobbing PlasmaPower/random-walk
[INFO] frobbed toml for PlasmaPower/random-walk written to work/ex/beta-1.37-6/sources/1.36.0/gh/PlasmaPower/random-walk/Cargo.toml
[INFO] started frobbing PlasmaPower/random-walk
[INFO] finished frobbing PlasmaPower/random-walk
[INFO] frobbed toml for PlasmaPower/random-walk written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/PlasmaPower/random-walk/Cargo.toml
[INFO] crate PlasmaPower/random-walk 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing PlasmaPower/random-walk 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-0/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/PlasmaPower/random-walk:/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] 0a2d679fb876f1893c4b8b701ebaeb385c4c6eddb71a5ec1570bc6c86ea17228
[INFO] running `"docker" "start" "-a" "0a2d679fb876f1893c4b8b701ebaeb385c4c6eddb71a5ec1570bc6c86ea17228"`
[INFO] [stderr]    Compiling random-walk v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:51:30
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn random_walk(mut rng: &mut Rng, starting_room: &Room) -> u8 {
[INFO] [stderr]    |                              ^^^ help: use `dyn`: `dyn Rng`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.84s
[INFO] running `"docker" "inspect" "0a2d679fb876f1893c4b8b701ebaeb385c4c6eddb71a5ec1570bc6c86ea17228"`
[INFO] running `"docker" "rm" "-f" "0a2d679fb876f1893c4b8b701ebaeb385c4c6eddb71a5ec1570bc6c86ea17228"`
[INFO] [stdout] 0a2d679fb876f1893c4b8b701ebaeb385c4c6eddb71a5ec1570bc6c86ea17228
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/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/PlasmaPower/random-walk:/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] c3e897548bd029a2ed6d235f40d81b98868e5c43d8e70d45c57af24fee75c337
[INFO] running `"docker" "start" "-a" "c3e897548bd029a2ed6d235f40d81b98868e5c43d8e70d45c57af24fee75c337"`
[INFO] [stderr]    Compiling random-walk v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:51:30
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn random_walk(mut rng: &mut Rng, starting_room: &Room) -> u8 {
[INFO] [stderr]    |                              ^^^ help: use `dyn`: `dyn Rng`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "c3e897548bd029a2ed6d235f40d81b98868e5c43d8e70d45c57af24fee75c337"`
[INFO] running `"docker" "rm" "-f" "c3e897548bd029a2ed6d235f40d81b98868e5c43d8e70d45c57af24fee75c337"`
[INFO] [stdout] c3e897548bd029a2ed6d235f40d81b98868e5c43d8e70d45c57af24fee75c337
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/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/PlasmaPower/random-walk:/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] 9bd95b04e1fec38be5bc4834669f2ae4e1ac539326d82553d7644915bf8a6ce2
[INFO] running `"docker" "start" "-a" "9bd95b04e1fec38be5bc4834669f2ae4e1ac539326d82553d7644915bf8a6ce2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/random_walk-3164681626e69378
[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" "9bd95b04e1fec38be5bc4834669f2ae4e1ac539326d82553d7644915bf8a6ce2"`
[INFO] running `"docker" "rm" "-f" "9bd95b04e1fec38be5bc4834669f2ae4e1ac539326d82553d7644915bf8a6ce2"`
[INFO] [stdout] 9bd95b04e1fec38be5bc4834669f2ae4e1ac539326d82553d7644915bf8a6ce2