[INFO] updating cached repository https://github.com/NivenT/Brainfuck_AI
[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] 20fcf955b2ebe68d31fc84293b809e4858b983f7
[INFO] checking NivenT/Brainfuck_AI against nightly-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNivenT%2FBrainfuck_AI" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NivenT/Brainfuck_AI on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/NivenT/Brainfuck_AI
[INFO] finished tweaking git repo https://github.com/NivenT/Brainfuck_AI
[INFO] tweaked toml for git repo https://github.com/NivenT/Brainfuck_AI written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/NivenT/Brainfuck_AI already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=allow" "-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" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 60685900883c2f0396ba2911c0d6dff29bfbfc86799ae89428f84f87e79a02b9
[INFO] running `"docker" "start" "-a" "60685900883c2f0396ba2911c0d6dff29bfbfc86799ae89428f84f87e79a02b9"`
[INFO] [stderr]     Checking Brainfuck_AI v0.1.0 (/opt/rustwide/workdir)
[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]    |                                        ^^^^^^^^^^^^^^^ method not found in `rand::prelude::ThreadRng`
[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] warning: build failed, waiting for other jobs to finish...
[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]    |                                        ^^^^^^^^^^^^^^^ method not found in `rand::prelude::ThreadRng`
[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" "60685900883c2f0396ba2911c0d6dff29bfbfc86799ae89428f84f87e79a02b9"`
[INFO] running `"docker" "rm" "-f" "60685900883c2f0396ba2911c0d6dff29bfbfc86799ae89428f84f87e79a02b9"`
[INFO] [stdout] 60685900883c2f0396ba2911c0d6dff29bfbfc86799ae89428f84f87e79a02b9