[INFO] updating cached repository swzhou/rustguessnumber
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/swzhou/rustguessnumber
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/swzhou/rustguessnumber" "work/ex/beta-1.38-1/sources/1.37.0/gh/swzhou/rustguessnumber"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/swzhou/rustguessnumber'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/swzhou/rustguessnumber" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/swzhou/rustguessnumber"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/swzhou/rustguessnumber'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f67634ba132a303946d42cc3a1293aa44d3d85d6
[INFO] sha for GitHub repo swzhou/rustguessnumber: f67634ba132a303946d42cc3a1293aa44d3d85d6
[INFO] validating manifest of swzhou/rustguessnumber 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 swzhou/rustguessnumber 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 swzhou/rustguessnumber
[INFO] finished frobbing swzhou/rustguessnumber
[INFO] frobbed toml for swzhou/rustguessnumber written to work/ex/beta-1.38-1/sources/1.37.0/gh/swzhou/rustguessnumber/Cargo.toml
[INFO] started frobbing swzhou/rustguessnumber
[INFO] finished frobbing swzhou/rustguessnumber
[INFO] frobbed toml for swzhou/rustguessnumber written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/swzhou/rustguessnumber/Cargo.toml
[INFO] crate swzhou/rustguessnumber 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 swzhou/rustguessnumber 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/swzhou/rustguessnumber:/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] d8379f8e820622a21e82e7750ec339a01bbe5689081c8bd512e5262bcf040fb5
[INFO] running `"docker" "start" "-a" "d8379f8e820622a21e82e7750ec339a01bbe5689081c8bd512e5262bcf040fb5"`
[INFO] [stderr]    Compiling guessing_game v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::old_io`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::old_io;
[INFO] [stderr]   |     ^^^^^^^^^^^ no `old_io` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::rand`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::rand;
[INFO] [stderr]   |     ^^^^^^^^^ no `rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `guessing_game`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d8379f8e820622a21e82e7750ec339a01bbe5689081c8bd512e5262bcf040fb5"`
[INFO] running `"docker" "rm" "-f" "d8379f8e820622a21e82e7750ec339a01bbe5689081c8bd512e5262bcf040fb5"`
[INFO] [stdout] d8379f8e820622a21e82e7750ec339a01bbe5689081c8bd512e5262bcf040fb5