[INFO] cloning repository https://github.com/Axelderan/lexgen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Axelderan/lexgen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAxelderan%2Flexgen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAxelderan%2Flexgen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 058593568e122cd6d158d6ab3a7d7a90c252759a
[INFO] testing Axelderan/lexgen against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAxelderan%2Flexgen" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Axelderan/lexgen on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Axelderan/lexgen
[INFO] finished tweaking git repo https://github.com/Axelderan/lexgen
[INFO] tweaked toml for git repo https://github.com/Axelderan/lexgen written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Axelderan/lexgen already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fef6f4603a50ca90f065e8b667e5ac85e0505bce287a08fcbbff11032da6b33d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fef6f4603a50ca90f065e8b667e5ac85e0505bce287a08fcbbff11032da6b33d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fef6f4603a50ca90f065e8b667e5ac85e0505bce287a08fcbbff11032da6b33d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fef6f4603a50ca90f065e8b667e5ac85e0505bce287a08fcbbff11032da6b33d", kill_on_drop: false }`
[INFO] [stdout] fef6f4603a50ca90f065e8b667e5ac85e0505bce287a08fcbbff11032da6b33d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80bfc63744e8c75d17458c70628bda46fcfe5788e311e15fb22394161a801188
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "80bfc63744e8c75d17458c70628bda46fcfe5788e311e15fb22394161a801188", kill_on_drop: false }`
[INFO] [stderr]    Compiling rejeks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::unoptimized_dfa`
[INFO] [stdout]  --> src/dfa/optimized_dfa.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::unoptimized_dfa;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]  --> src/dfa/optimized_dfa.rs:5:36
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut buckets = vec![vec![]; (acceptances + 1)];
[INFO] [stdout]   |                                    ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NFATransition`, `NFA`
[INFO] [stdout]  --> src/dfa/mod.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::dfa::nfa::{NFATransition, NFA};
[INFO] [stdout]   |                       ^^^^^^^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DFA`, `ParseError`
[INFO] [stdout]   --> src/lib.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::dfa::{ParseError, DFA};
[INFO] [stdout]    |                  ^^^^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed for `std::option::Option<T>`
[INFO] [stdout]   --> src/dfa/optimized_dfa.rs:38:34
[INFO] [stdout]    |
[INFO] [stdout] 38 |             let mut new_bucket = None;
[INFO] [stdout]    |                 --------------   ^^^^ cannot infer type for type parameter `T` declared on the enum `Option`
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 consider giving `new_bucket` the explicit type `std::option::Option<T>`, where the type parameter `T` is specified
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rejeks`.
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "80bfc63744e8c75d17458c70628bda46fcfe5788e311e15fb22394161a801188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80bfc63744e8c75d17458c70628bda46fcfe5788e311e15fb22394161a801188", kill_on_drop: false }`
[INFO] [stdout] 80bfc63744e8c75d17458c70628bda46fcfe5788e311e15fb22394161a801188