[INFO] cloning repository performance/enum_hall
[INFO] running `"git" "clone" "--bare" "git://github.com/performance/enum_hall.git" "work/cache/sources/gh/performance/enum_hall"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/performance/enum_hall'...
[INFO] running `"git" "clone" "work/cache/sources/gh/performance/enum_hall" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/performance/enum_hall"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/performance/enum_hall'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/performance/enum_hall" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/performance/enum_hall"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/performance/enum_hall'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 92a1d9b240fb5b4899db5644a3a0010441c0821f
[INFO] sha for GitHub repo performance/enum_hall: 92a1d9b240fb5b4899db5644a3a0010441c0821f
[INFO] validating manifest of performance/enum_hall on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of performance/enum_hall on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing performance/enum_hall
[INFO] finished frobbing performance/enum_hall
[INFO] frobbed toml for performance/enum_hall written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/performance/enum_hall/Cargo.toml
[INFO] started frobbing performance/enum_hall
[INFO] finished frobbing performance/enum_hall
[INFO] frobbed toml for performance/enum_hall written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/performance/enum_hall/Cargo.toml
[INFO] crate performance/enum_hall already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/performance/enum_hall/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking performance/enum_hall against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-4/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/performance/enum_hall:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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=forbid" "-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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b7a9fc66b4ba7f553db04622e46e160a8c6c803cfdb91598a364b6322c0de4be
[INFO] running `"docker" "start" "-a" "b7a9fc66b4ba7f553db04622e46e160a8c6c803cfdb91598a364b6322c0de4be"`
[INFO] [stderr]     Checking enum_hall v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0425]: cannot find function `sample` in module `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] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `sample` in module `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] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `sample` in module `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] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: meta-variable repeats with different Kleene operator
[INFO] [stderr]   --> <::enum_derive::IterVariants macros>:23:49
[INFO] [stderr]    |
[INFO] [stderr] 13 | $ ( $ var_names : ident ) , * ) ) => {
[INFO] [stderr]    |                             - expected repetition
[INFO] [stderr] ...
[INFO] [stderr] 23 | enum_derive_util ! ( @ first_expr $ ( $ name :: $ var_names ) , + ) ) ) } } }
[INFO] [stderr]    |                                                 ^^^^^^^^^^^     - conflicting repetition
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(meta_variable_misuse)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: meta-variable repeats with different Kleene operator
[INFO] [stderr]   --> <::enum_derive::IterVariantNames macros>:24:49
[INFO] [stderr]    |
[INFO] [stderr] 13 | $ ( $ var_names : ident ) , * ) ) => {
[INFO] [stderr]    |                             - expected repetition
[INFO] [stderr] ...
[INFO] [stderr] 24 | enum_derive_util ! ( @ first_expr $ ( $ name :: $ var_names ) , + ) ) ) } } }
[INFO] [stderr]    |                                                 ^^^^^^^^^^^     - conflicting repetition
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `sample` in module `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] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `sample` in module `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] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `sample` in module `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] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 6  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: meta-variable repeats with different Kleene operator
[INFO] [stderr]   --> <::enum_derive::IterVariants macros>:23:49
[INFO] [stderr]    |
[INFO] [stderr] 13 | $ ( $ var_names : ident ) , * ) ) => {
[INFO] [stderr]    |                             - expected repetition
[INFO] [stderr] ...
[INFO] [stderr] 23 | enum_derive_util ! ( @ first_expr $ ( $ name :: $ var_names ) , + ) ) ) } } }
[INFO] [stderr]    |                                                 ^^^^^^^^^^^     - conflicting repetition
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(meta_variable_misuse)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: meta-variable repeats with different Kleene operator
[INFO] [stderr]   --> <::enum_derive::IterVariantNames macros>:24:49
[INFO] [stderr]    |
[INFO] [stderr] 13 | $ ( $ var_names : ident ) , * ) ) => {
[INFO] [stderr]    |                             - expected repetition
[INFO] [stderr] ...
[INFO] [stderr] 24 | enum_derive_util ! ( @ first_expr $ ( $ name :: $ var_names ) , + ) ) ) } } }
[INFO] [stderr]    |                                                 ^^^^^^^^^^^     - conflicting repetition
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 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] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 5 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" "b7a9fc66b4ba7f553db04622e46e160a8c6c803cfdb91598a364b6322c0de4be"`
[INFO] running `"docker" "rm" "-f" "b7a9fc66b4ba7f553db04622e46e160a8c6c803cfdb91598a364b6322c0de4be"`
[INFO] [stdout] b7a9fc66b4ba7f553db04622e46e160a8c6c803cfdb91598a364b6322c0de4be