[INFO] updating cached repository https://github.com/MrRobb/tetris-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 030fb89637c5567350c49493eb1f323f1acaf223
[INFO] checking MrRobb/tetris-rs against try#8a5e87609850cdd8679aada01eb0f3062f254ca8 for pr-71140
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMrRobb%2Ftetris-rs" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MrRobb/tetris-rs on toolchain 8a5e87609850cdd8679aada01eb0f3062f254ca8
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/MrRobb/tetris-rs
[INFO] finished tweaking git repo https://github.com/MrRobb/tetris-rs
[INFO] tweaked toml for git repo https://github.com/MrRobb/tetris-rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/MrRobb/tetris-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f1e0d85e1050b05315e7034d0145239c37f7e271d705d13ad1eedd79e05ea479
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "f1e0d85e1050b05315e7034d0145239c37f7e271d705d13ad1eedd79e05ea479"`
[INFO] [stderr]    Compiling syn v0.15.34
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[INFO] [stderr] error[E0433]: failed to resolve: could not find `SmallRng` in `rngs`
[INFO] [stderr]   --> src/tetris/model/board.rs:61:23
[INFO] [stderr]    |
[INFO] [stderr] 61 |         let mut rng = rngs::SmallRng::from_seed(seed);
[INFO] [stderr]    |                             ^^^^^^^^ could not find `SmallRng` in `rngs`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `SmallRng` in module `rngs`
[INFO] [stderr]   --> src/tetris/model/board.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |     rng: rngs::SmallRng,
[INFO] [stderr]    |                ^^^^^^^^ not found in `rngs`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SeedableRng`
[INFO] [stderr]  --> src/tetris/model/board.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{rngs, Rng, SeedableRng};
[INFO] [stderr]   |                       ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `SmallRng` in `rngs`
[INFO] [stderr]   --> src/tetris/model/board.rs:61:23
[INFO] [stderr]    |
[INFO] [stderr] 61 |         let mut rng = rngs::SmallRng::from_seed(seed);
[INFO] [stderr]    |                             ^^^^^^^^ could not find `SmallRng` in `rngs`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `SmallRng` in module `rngs`
[INFO] [stderr]   --> src/tetris/model/board.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |     rng: rngs::SmallRng,
[INFO] [stderr]    |                ^^^^^^^^ not found in `rngs`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SeedableRng`
[INFO] [stderr]  --> src/tetris/model/board.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{rngs, Rng, SeedableRng};
[INFO] [stderr]   |                       ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]  --> src/tetris/model/board.rs:3:18
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{rngs, Rng, SeedableRng};
[INFO] [stderr]   |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: could not compile `tetris`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]  --> src/tetris/model/board.rs:3:18
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{rngs, Rng, SeedableRng};
[INFO] [stderr]   |                  ^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: could not compile `tetris`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f1e0d85e1050b05315e7034d0145239c37f7e271d705d13ad1eedd79e05ea479"`
[INFO] running `"docker" "rm" "-f" "f1e0d85e1050b05315e7034d0145239c37f7e271d705d13ad1eedd79e05ea479"`
[INFO] [stdout] f1e0d85e1050b05315e7034d0145239c37f7e271d705d13ad1eedd79e05ea479