[INFO] updating cached repository b4284/guessing_game
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/b4284/guessing_game
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/b4284/guessing_game" "work/ex/beta-1.38-1/sources/1.37.0/gh/b4284/guessing_game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/b4284/guessing_game'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/b4284/guessing_game" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/b4284/guessing_game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/b4284/guessing_game'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c1780cdf1b0740d0297c46b50d131e91c6ae2bd8
[INFO] sha for GitHub repo b4284/guessing_game: c1780cdf1b0740d0297c46b50d131e91c6ae2bd8
[INFO] validating manifest of b4284/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 b4284/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 b4284/guessing_game
[INFO] finished frobbing b4284/guessing_game
[INFO] frobbed toml for b4284/guessing_game written to work/ex/beta-1.38-1/sources/1.37.0/gh/b4284/guessing_game/Cargo.toml
[INFO] started frobbing b4284/guessing_game
[INFO] finished frobbing b4284/guessing_game
[INFO] frobbed toml for b4284/guessing_game written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/b4284/guessing_game/Cargo.toml
[INFO] crate b4284/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing b4284/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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/b4284/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] 47422e344ae7d230250ad85ac6df842a42b1eb4cd53a7a34df604935235a4a0d
[INFO] running `"docker" "start" "-a" "47422e344ae7d230250ad85ac6df842a42b1eb4cd53a7a34df604935235a4a0d"`
[INFO] [stderr]    Compiling guessing_game v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: could not find `rand` in `std`
[INFO] [stderr]  --> src/main.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let secret = std::rand::random::<u8>() % 100 + 1;
[INFO] [stderr]   |                       ^^^^ could not find `rand` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 1 parameter but 0 parameters were supplied
[INFO] [stderr]   --> src/main.rs:31:38
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let input = std::io::stdin().read_line().ok().expect("shouldn't fail");
[INFO] [stderr]    |                                      ^^^^^^^^^ expected 1 parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `trim` found for type `usize` in the current scope
[INFO] [stderr]   --> src/main.rs:32:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |         match input.trim().parse::<u8>() {
[INFO] [stderr]    |                     ^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0061, E0433, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0061`.
[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" "47422e344ae7d230250ad85ac6df842a42b1eb4cd53a7a34df604935235a4a0d"`
[INFO] running `"docker" "rm" "-f" "47422e344ae7d230250ad85ac6df842a42b1eb4cd53a7a34df604935235a4a0d"`
[INFO] [stdout] 47422e344ae7d230250ad85ac6df842a42b1eb4cd53a7a34df604935235a4a0d