[INFO] updating cached repository Hokutosei/learn_rustlang
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Hokutosei/learn_rustlang
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Hokutosei/learn_rustlang" "work/ex/beta-1.38-1/sources/1.37.0/gh/Hokutosei/learn_rustlang"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Hokutosei/learn_rustlang'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Hokutosei/learn_rustlang" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Hokutosei/learn_rustlang"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Hokutosei/learn_rustlang'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] eba99a8585999f1652270066e9c40a0946daef34
[INFO] sha for GitHub repo Hokutosei/learn_rustlang: eba99a8585999f1652270066e9c40a0946daef34
[INFO] validating manifest of Hokutosei/learn_rustlang 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 Hokutosei/learn_rustlang 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 Hokutosei/learn_rustlang
[INFO] finished frobbing Hokutosei/learn_rustlang
[INFO] frobbed toml for Hokutosei/learn_rustlang written to work/ex/beta-1.38-1/sources/1.37.0/gh/Hokutosei/learn_rustlang/Cargo.toml
[INFO] started frobbing Hokutosei/learn_rustlang
[INFO] finished frobbing Hokutosei/learn_rustlang
[INFO] frobbed toml for Hokutosei/learn_rustlang written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Hokutosei/learn_rustlang/Cargo.toml
[INFO] crate Hokutosei/learn_rustlang 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Hokutosei/learn_rustlang against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Hokutosei/learn_rustlang:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 83fd24479c59ac1a3b80a9cdea164f8c1d2b8a158cba95a0d1a84198c3328646
[INFO] running `"docker" "start" "-a" "83fd24479c59ac1a3b80a9cdea164f8c1d2b8a158cba95a0d1a84198c3328646"`
[INFO] [stderr]    Compiling learn101 v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::rand`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::rand;
[INFO] [stderr]   |     ^^^^^^^^^ no `rand` in the root
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::thread::sleep_ms': replaced by `std::thread::sleep`
[INFO] [stderr]   --> src/main.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         thread::sleep_ms(delay);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::thread::sleep_ms': replaced by `std::thread::sleep`
[INFO] [stderr]   --> src/main.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |             thread::sleep_ms(x);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:22:26
[INFO] [stderr]    |
[INFO] [stderr] 22 |             let x: u32 = randTime();
[INFO] [stderr]    |                          ^^^^^^^^^^ expected u32, found i32
[INFO] [stderr] help: you can convert an `i32` to `u32` and panic if the converted value wouldn't fit
[INFO] [stderr]    |
[INFO] [stderr] 22 |             let x: u32 = randTime().try_into().unwrap();
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `learn101`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "83fd24479c59ac1a3b80a9cdea164f8c1d2b8a158cba95a0d1a84198c3328646"`
[INFO] running `"docker" "rm" "-f" "83fd24479c59ac1a3b80a9cdea164f8c1d2b8a158cba95a0d1a84198c3328646"`
[INFO] [stdout] 83fd24479c59ac1a3b80a9cdea164f8c1d2b8a158cba95a0d1a84198c3328646