[INFO] updating cached repository https://github.com/akrisrn/leet-code-rust
[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] 0e7052d00dd3095f98cb9ddf4e27b88366e9282b
[INFO] testing akrisrn/leet-code-rust against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fakrisrn%2Fleet-code-rust" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/akrisrn/leet-code-rust on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/akrisrn/leet-code-rust
[INFO] finished tweaking git repo https://github.com/akrisrn/leet-code-rust
[INFO] tweaked toml for git repo https://github.com/akrisrn/leet-code-rust written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/akrisrn/leet-code-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stdout] f375d4076acef55a1070c0a05a08188111cb4d5b074ce93fa975d877fbaab428
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "f375d4076acef55a1070c0a05a08188111cb4d5b074ce93fa975d877fbaab428"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling leet-code-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/solution/easy/p83_remove_duplicates_from_sorted_list.rs:16:62
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn delete_duplicates(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {}
[INFO] [stderr]    |            -----------------                                 ^^^^^^^^^^^^^^^^^^^^^ expected enum `std::option::Option`, found `()`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr]    |
[INFO] [stderr]    = note:   expected enum `std::option::Option<std::boxed::Box<solution::easy::p83_remove_duplicates_from_sorted_list::ListNode>>`
[INFO] [stderr]            found unit type `()`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/solution/easy/p88_merge_sorted_array.rs:22:81
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) -> Vec<i32> {}
[INFO] [stderr]    |            -----                                                                ^^^^^^^^ expected struct `std::vec::Vec`, found `()`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected struct `std::vec::Vec<i32>`
[INFO] [stderr]            found unit type `()`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `leet-code-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f375d4076acef55a1070c0a05a08188111cb4d5b074ce93fa975d877fbaab428"`
[INFO] running `"docker" "rm" "-f" "f375d4076acef55a1070c0a05a08188111cb4d5b074ce93fa975d877fbaab428"`
[INFO] [stdout] f375d4076acef55a1070c0a05a08188111cb4d5b074ce93fa975d877fbaab428