[INFO] crate gameai 0.0.2 is already in cache
[INFO] extracting crate gameai 0.0.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/gameai/0.0.2
[INFO] extracting crate gameai 0.0.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/gameai/0.0.2
[INFO] validating manifest of gameai-0.0.2 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gameai-0.0.2 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gameai-0.0.2
[INFO] finished frobbing gameai-0.0.2
[INFO] frobbed toml for gameai-0.0.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/gameai/0.0.2/Cargo.toml
[INFO] started frobbing gameai-0.0.2
[INFO] finished frobbing gameai-0.0.2
[INFO] frobbed toml for gameai-0.0.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/gameai/0.0.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing gameai-0.0.2 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/gameai/0.0.2:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 81c28975c6721bb7f26b7679c0170f612592d38c143fe59358d7cffcec584bce
[INFO] running `"docker" "start" "-a" "81c28975c6721bb7f26b7679c0170f612592d38c143fe59358d7cffcec584bce"`
[INFO] [stderr]    Compiling cpuprofiler v0.0.3
[INFO] [stderr]    Compiling gameai v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `rand::XorShiftRng`
[INFO] [stderr]  --> src/strategies/negamax.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use rand::XorShiftRng;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^ no `XorShiftRng` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::XorShiftRng`
[INFO] [stderr]  --> src/strategies/mcts.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::{Rng, XorShiftRng};
[INFO] [stderr]   |                 ^^^^^^^^^^^ no `XorShiftRng` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::XorShiftRng`
[INFO] [stderr]  --> src/strategies/mcts_parallel.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use rand::XorShiftRng;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^ no `XorShiftRng` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Rand` in module `rand`
[INFO] [stderr]   --> src/game/connectfour.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 | impl rand::Rand for Color {
[INFO] [stderr]    |            ^^^^ not found in `rand`
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Rand` in module `rand`
[INFO] [stderr]   --> src/game/dots.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 | impl rand::Rand for DotsPlayer {
[INFO] [stderr]    |            ^^^^ not found in `rand`
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Rand` in module `rand`
[INFO] [stderr]    --> src/runner.rs:126:28
[INFO] [stderr]     |
[INFO] [stderr] 126 |     G::Agent: Send + rand::Rand + fmt::Display,
[INFO] [stderr]     |                            ^^^^ not found in `rand`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0405, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0405`.
[INFO] [stderr] error: Could not compile `gameai`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "81c28975c6721bb7f26b7679c0170f612592d38c143fe59358d7cffcec584bce"`
[INFO] running `"docker" "rm" "-f" "81c28975c6721bb7f26b7679c0170f612592d38c143fe59358d7cffcec584bce"`
[INFO] [stdout] 81c28975c6721bb7f26b7679c0170f612592d38c143fe59358d7cffcec584bce