[INFO] updating cached repository https://github.com/performance/enum_hall
[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] 92a1d9b240fb5b4899db5644a3a0010441c0821f
[INFO] testing performance/enum_hall against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperformance%2Fenum_hall" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files: 100% (37/37)   
Checking out files: 100% (37/37), done.
[INFO] validating manifest of git repo https://github.com/performance/enum_hall on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/performance/enum_hall
[INFO] finished tweaking git repo https://github.com/performance/enum_hall
[INFO] tweaked toml for git repo https://github.com/performance/enum_hall written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/performance/enum_hall already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-7/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stdout] 2c5d7fa76377f48b51489017d5e50a692c647cac43ec2483b9b2ad4f2b534212
[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" "2c5d7fa76377f48b51489017d5e50a692c647cac43ec2483b9b2ad4f2b534212"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling custom_derive v0.1.7
[INFO] [stderr]    Compiling enum_derive v0.1.7
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling enum_hall v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0425]: cannot find function `sample` in crate `rand`
[INFO] [stderr]   --> src/main.rs:22:44
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let car_choice    : DoorChoice = rand::sample( rng, door_choices.into_iter(), 1)[0].clone();
[INFO] [stderr]    |                                            ^^^^^^ not found in `rand`
[INFO] [stderr]    |
[INFO] [stderr] help: consider importing this function
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `sample` in crate `rand`
[INFO] [stderr]   --> src/main.rs:23:44
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let player_choice : DoorChoice = rand::sample( rng, door_choices.into_iter(), 1)[0].clone();
[INFO] [stderr]    |                                            ^^^^^^ not found in `rand`
[INFO] [stderr]    |
[INFO] [stderr] help: consider importing this function
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `sample` in crate `rand`
[INFO] [stderr]   --> src/main.rs:42:11
[INFO] [stderr]    |
[INFO] [stderr] 42 |     rand::sample(rng, choices.into_iter(), 1)[0].clone()
[INFO] [stderr]    |           ^^^^^^ not found in `rand`
[INFO] [stderr]    |
[INFO] [stderr] help: consider importing this function
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: could not compile `enum_hall`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2c5d7fa76377f48b51489017d5e50a692c647cac43ec2483b9b2ad4f2b534212"`
[INFO] running `"docker" "rm" "-f" "2c5d7fa76377f48b51489017d5e50a692c647cac43ec2483b9b2ad4f2b534212"`
[INFO] [stdout] 2c5d7fa76377f48b51489017d5e50a692c647cac43ec2483b9b2ad4f2b534212