[INFO] updating cached repository vrinek/memory-game
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vrinek/memory-game
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vrinek/memory-game" "work/ex/beta-1.38-1/sources/1.37.0/gh/vrinek/memory-game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/vrinek/memory-game'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vrinek/memory-game" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vrinek/memory-game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vrinek/memory-game'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 76a57c4760e7c8e7b444bc642dcbcdd3951b75b2
[INFO] sha for GitHub repo vrinek/memory-game: 76a57c4760e7c8e7b444bc642dcbcdd3951b75b2
[INFO] validating manifest of vrinek/memory-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 vrinek/memory-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 vrinek/memory-game
[INFO] finished frobbing vrinek/memory-game
[INFO] frobbed toml for vrinek/memory-game written to work/ex/beta-1.38-1/sources/1.37.0/gh/vrinek/memory-game/Cargo.toml
[INFO] started frobbing vrinek/memory-game
[INFO] finished frobbing vrinek/memory-game
[INFO] frobbed toml for vrinek/memory-game written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vrinek/memory-game/Cargo.toml
[INFO] crate vrinek/memory-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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vrinek/memory-game/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] testing vrinek/memory-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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vrinek/memory-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] 9b6365cb1769fb337d55c6136c262e8211b7d8bc285eceb31cc110a895ea4996
[INFO] running `"docker" "start" "-a" "9b6365cb1769fb337d55c6136c262e8211b7d8bc285eceb31cc110a895ea4996"`
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling image v0.22.1
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling piston-gfx_texture v0.38.0
[INFO] [stderr]    Compiling piston2d-gfx_graphics v0.64.0
[INFO] [stderr]    Compiling pistoncore-input v0.28.0
[INFO] [stderr]    Compiling pistoncore-window v0.44.0
[INFO] [stderr]    Compiling pistoncore-event_loop v0.49.0
[INFO] [stderr]    Compiling pistoncore-glutin_window v0.63.0
[INFO] [stderr]    Compiling piston v0.49.0
[INFO] [stderr]    Compiling piston_window v0.103.0
[INFO] [stderr]    Compiling memory-game v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `rand::XorShiftRng`
[INFO] [stderr]  --> src/deck.rs:3:30
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{Rng, SeedableRng, XorShiftRng};
[INFO] [stderr]   |                              ^^^^^^^^^^^ no `XorShiftRng` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `weak_rng` in module `rand`
[INFO] [stderr]   --> src/deck.rs:55:19
[INFO] [stderr]    |
[INFO] [stderr] 55 |             rand::weak_rng()
[INFO] [stderr]    |                   ^^^^^^^^ not found in `rand`
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Rng`, `SeedableRng`
[INFO] [stderr]  --> src/deck.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{Rng, SeedableRng, XorShiftRng};
[INFO] [stderr]   |            ^^^  ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: `piston_window::PistonWindow` is not an iterator
[INFO] [stderr]   --> src/app.rs:25:18
[INFO] [stderr]    |
[INFO] [stderr] 25 |         for e in window {
[INFO] [stderr]    |                  ^^^^^^ `piston_window::PistonWindow` is not an iterator
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::iter::Iterator` is not implemented for `piston_window::PistonWindow`
[INFO] [stderr]    = note: required by `std::iter::IntoIterator::into_iter`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0425, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `memory-game`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9b6365cb1769fb337d55c6136c262e8211b7d8bc285eceb31cc110a895ea4996"`
[INFO] running `"docker" "rm" "-f" "9b6365cb1769fb337d55c6136c262e8211b7d8bc285eceb31cc110a895ea4996"`
[INFO] [stdout] 9b6365cb1769fb337d55c6136c262e8211b7d8bc285eceb31cc110a895ea4996