[INFO] updating cached repository NivenT/Brainfuck_AI
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/NivenT/Brainfuck_AI
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/NivenT/Brainfuck_AI" "work/ex/beta-1.38-1/sources/1.37.0/gh/NivenT/Brainfuck_AI"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/NivenT/Brainfuck_AI'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/NivenT/Brainfuck_AI" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/NivenT/Brainfuck_AI"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/NivenT/Brainfuck_AI'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 20fcf955b2ebe68d31fc84293b809e4858b983f7
[INFO] sha for GitHub repo NivenT/Brainfuck_AI: 20fcf955b2ebe68d31fc84293b809e4858b983f7
[INFO] validating manifest of NivenT/Brainfuck_AI 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 NivenT/Brainfuck_AI 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 NivenT/Brainfuck_AI
[INFO] finished frobbing NivenT/Brainfuck_AI
[INFO] frobbed toml for NivenT/Brainfuck_AI written to work/ex/beta-1.38-1/sources/1.37.0/gh/NivenT/Brainfuck_AI/Cargo.toml
[INFO] started frobbing NivenT/Brainfuck_AI
[INFO] finished frobbing NivenT/Brainfuck_AI
[INFO] frobbed toml for NivenT/Brainfuck_AI written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/NivenT/Brainfuck_AI/Cargo.toml
[INFO] crate NivenT/Brainfuck_AI 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/NivenT/Brainfuck_AI/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[INFO] the lockfile is outdated, regenerating it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] 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] testing NivenT/Brainfuck_AI 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/NivenT/Brainfuck_AI:/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] a074f7da3603f67d3a62a6d94a5a5b5f4d11dd9da13c750ef9b1f7d2fd9ee739
[INFO] running `"docker" "start" "-a" "a074f7da3603f67d3a62a6d94a5a5b5f4d11dd9da13c750ef9b1f7d2fd9ee739"`
[INFO] [stderr]    Compiling Brainfuck_AI v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]  --> src/interpreter.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use rand::{thread_rng, Rng};
[INFO] [stderr]   |                        ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/algorithm.rs:11:19
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fit_func:             Box<Fitness>,
[INFO] [stderr]    |                               ^^^^^^^ help: use `dyn`: `dyn Fitness`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/algorithm.rs:20:89
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn new(size: usize, mut_rate: f64, cross_rate: f64, bred: f64, kept: f64, fit: Box<Fitness>) -> GAlgo {
[INFO] [stderr]    |                                                                                            ^^^^^^^ help: use `dyn`: `dyn Fitness`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `gen_ascii_chars` found for type `rand::prelude::ThreadRng` in the current scope
[INFO] [stderr]   --> src/interpreter.rs:62:37
[INFO] [stderr]    |
[INFO] [stderr] 62 |         InputTape{stream: thread_rng().gen_ascii_chars().take(len).collect()}
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `Brainfuck_AI`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a074f7da3603f67d3a62a6d94a5a5b5f4d11dd9da13c750ef9b1f7d2fd9ee739"`
[INFO] running `"docker" "rm" "-f" "a074f7da3603f67d3a62a6d94a5a5b5f4d11dd9da13c750ef9b1f7d2fd9ee739"`
[INFO] [stdout] a074f7da3603f67d3a62a6d94a5a5b5f4d11dd9da13c750ef9b1f7d2fd9ee739