[INFO] updating cached repository Axelderan/lexgen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Axelderan/lexgen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Axelderan/lexgen" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Axelderan/lexgen"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Axelderan/lexgen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Axelderan/lexgen" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Axelderan/lexgen"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Axelderan/lexgen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 058593568e122cd6d158d6ab3a7d7a90c252759a
[INFO] sha for GitHub repo Axelderan/lexgen: 058593568e122cd6d158d6ab3a7d7a90c252759a
[INFO] validating manifest of Axelderan/lexgen on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Axelderan/lexgen on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Axelderan/lexgen
[INFO] finished frobbing Axelderan/lexgen
[INFO] frobbed toml for Axelderan/lexgen written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Axelderan/lexgen/Cargo.toml
[INFO] started frobbing Axelderan/lexgen
[INFO] finished frobbing Axelderan/lexgen
[INFO] frobbed toml for Axelderan/lexgen written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Axelderan/lexgen/Cargo.toml
[INFO] crate Axelderan/lexgen already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Axelderan/lexgen against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-6/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Axelderan/lexgen:/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=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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7c9e5c8d35f8716b94cc3ed4c537ba76fdf34cdd3e566ff7fefd7c05794fc2d7
[INFO] running `"docker" "start" "-a" "7c9e5c8d35f8716b94cc3ed4c537ba76fdf34cdd3e566ff7fefd7c05794fc2d7"`
[INFO] [stderr]     Checking rejeks v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `super::unoptimized_dfa`
[INFO] [stderr]  --> src/dfa/optimized_dfa.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::unoptimized_dfa;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]  --> src/dfa/optimized_dfa.rs:5:36
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut buckets = vec![vec![]; (acceptances + 1)];
[INFO] [stderr]   |                                    ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `NFATransition`, `NFA`
[INFO] [stderr]  --> src/dfa/mod.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::dfa::nfa::{NFATransition, NFA};
[INFO] [stderr]   |                       ^^^^^^^^^^^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `DFA`, `ParseError`
[INFO] [stderr]   --> src/lib.rs:11:18
[INFO] [stderr]    |
[INFO] [stderr] 11 | use crate::dfa::{ParseError, DFA};
[INFO] [stderr]    |                  ^^^^^^^^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]  --> src/dfa/optimized_dfa.rs:5:36
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut buckets = vec![vec![]; (acceptances + 1)];
[INFO] [stderr]   |                                    ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `NFATransition`, `NFA`
[INFO] [stderr]  --> src/dfa/mod.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::dfa::nfa::{NFATransition, NFA};
[INFO] [stderr]   |                       ^^^^^^^^^^^^^  ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `DFA`, `ParseError`
[INFO] [stderr]   --> src/lib.rs:11:18
[INFO] [stderr]    |
[INFO] [stderr] 11 | use crate::dfa::{ParseError, DFA};
[INFO] [stderr]    |                  ^^^^^^^^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0282]: type annotations needed for `std::option::Option<T>`
[INFO] [stderr]   --> src/dfa/optimized_dfa.rs:38:34
[INFO] [stderr]    |
[INFO] [stderr] 38 |             let mut new_bucket = None;
[INFO] [stderr]    |                 --------------   ^^^^ cannot infer type for `T`
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 consider giving `new_bucket` the explicit type `std::option::Option<T>`, where the type parameter `T` is specified
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0282`.
[INFO] [stderr] error: Could not compile `rejeks`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0282]: type annotations needed for `std::option::Option<T>`
[INFO] [stderr]   --> src/dfa/optimized_dfa.rs:38:34
[INFO] [stderr]    |
[INFO] [stderr] 38 |             let mut new_bucket = None;
[INFO] [stderr]    |                 --------------   ^^^^ cannot infer type for `T`
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 consider giving `new_bucket` the explicit type `std::option::Option<T>`, where the type parameter `T` is specified
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0282`.
[INFO] [stderr] error: Could not compile `rejeks`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7c9e5c8d35f8716b94cc3ed4c537ba76fdf34cdd3e566ff7fefd7c05794fc2d7"`
[INFO] running `"docker" "rm" "-f" "7c9e5c8d35f8716b94cc3ed4c537ba76fdf34cdd3e566ff7fefd7c05794fc2d7"`
[INFO] [stdout] 7c9e5c8d35f8716b94cc3ed4c537ba76fdf34cdd3e566ff7fefd7c05794fc2d7