[INFO] updating cached repository Lapz/lox
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Lapz/lox
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Lapz/lox" "work/ex/beta-1.38-1/sources/1.37.0/gh/Lapz/lox"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Lapz/lox'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Lapz/lox" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Lapz/lox"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Lapz/lox'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ab169a8937bcb2afaa414e492495dc0880999425
[INFO] sha for GitHub repo Lapz/lox: ab169a8937bcb2afaa414e492495dc0880999425
[INFO] validating manifest of Lapz/lox 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 Lapz/lox 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 Lapz/lox
[INFO] finished frobbing Lapz/lox
[INFO] frobbed toml for Lapz/lox written to work/ex/beta-1.38-1/sources/1.37.0/gh/Lapz/lox/Cargo.toml
[INFO] started frobbing Lapz/lox
[INFO] finished frobbing Lapz/lox
[INFO] frobbed toml for Lapz/lox written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Lapz/lox/Cargo.toml
[INFO] crate Lapz/lox 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing Lapz/lox against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Lapz/lox:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 3893dd345b277067c589cc0636c815b2aad28c3e9a17b073c3ca49c5ea09cde1
[INFO] running `"docker" "start" "-a" "3893dd345b277067c589cc0636c815b2aad28c3e9a17b073c3ca49c5ea09cde1"`
[INFO] [stderr]    Compiling lox v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(nll)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/compiler.rs:22:36
[INFO] [stderr]    |
[INFO] [stderr] 22 |     prefix: HashMap<RuleToken, &'a PrefixParser>,
[INFO] [stderr]    |                                    ^^^^^^^^^^^^ help: use `dyn`: `dyn PrefixParser`
[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/compiler.rs:23:35
[INFO] [stderr]    |
[INFO] [stderr] 23 |     infix: HashMap<RuleToken, &'a InfixParser>,
[INFO] [stderr]    |                                   ^^^^^^^^^^^ help: use `dyn`: `dyn InfixParser`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the trait bound `compiler::IndexParselet: compiler::InfixParser` is not satisfied
[INFO] [stderr]   --> src/compiler.rs:96:18
[INFO] [stderr]    |
[INFO] [stderr] 96 |         compiler.infix(RuleToken::LBracket,&IndexParselet(Precedence::Call));
[INFO] [stderr]    |                  ^^^^^ the trait `compiler::InfixParser` is not implemented for `compiler::IndexParselet`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `lox`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3893dd345b277067c589cc0636c815b2aad28c3e9a17b073c3ca49c5ea09cde1"`
[INFO] running `"docker" "rm" "-f" "3893dd345b277067c589cc0636c815b2aad28c3e9a17b073c3ca49c5ea09cde1"`
[INFO] [stdout] 3893dd345b277067c589cc0636c815b2aad28c3e9a17b073c3ca49c5ea09cde1