[INFO] cloning repository https://github.com/jcrowgey/aoc_2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jcrowgey/aoc_2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcrowgey%2Faoc_2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcrowgey%2Faoc_2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b77ca12e3e1a80080036ec5defcd2d142ff619e
[INFO] checking jcrowgey/aoc_2018 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjcrowgey%2Faoc_2018" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jcrowgey/aoc_2018 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jcrowgey/aoc_2018
[INFO] finished tweaking git repo https://github.com/jcrowgey/aoc_2018
[INFO] tweaked toml for git repo https://github.com/jcrowgey/aoc_2018 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/jcrowgey/aoc_2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 815739d6f8410aedcc1d6930cdecbc38e01005c77b5b6367b336a7dab4c85b51
[INFO] running `Command { std: "docker" "start" "-a" "815739d6f8410aedcc1d6930cdecbc38e01005c77b5b6367b336a7dab4c85b51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "815739d6f8410aedcc1d6930cdecbc38e01005c77b5b6367b336a7dab4c85b51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "815739d6f8410aedcc1d6930cdecbc38e01005c77b5b6367b336a7dab4c85b51", kill_on_drop: false }`
[INFO] [stdout] 815739d6f8410aedcc1d6930cdecbc38e01005c77b5b6367b336a7dab4c85b51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b6e0a1cdd88629f19fe4de6da520b345d0507938d113e6561ea00f0b8f96fda
[INFO] running `Command { std: "docker" "start" "-a" "8b6e0a1cdd88629f19fe4de6da520b345d0507938d113e6561ea00f0b8f96fda", kill_on_drop: false }`
[INFO] [stderr]     Checking aoc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `char_counts` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/two.rs:14:32
[INFO] [stdout]    |
[INFO] [stdout] 13 |             match char_counts.get(&chr) {
[INFO] [stdout]    |                   ----------- immutable borrow occurs here
[INFO] [stdout] 14 |                 Some(count) => char_counts.insert(chr, count + 1),
[INFO] [stdout]    |                                ^^^^^^^^^^^             ----- immutable borrow later used here
[INFO] [stdout]    |                                |
[INFO] [stdout]    |                                mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `use_counts` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/three.rs:70:36
[INFO] [stdout]    |
[INFO] [stdout] 69 |                 match use_counts.get(&key) {
[INFO] [stdout]    |                       ---------- immutable borrow occurs here
[INFO] [stdout] 70 |                     Some(count) => use_counts.insert(key, count + 1),
[INFO] [stdout]    |                                    ^^^^^^^^^^             ----- immutable borrow later used here
[INFO] [stdout]    |                                    |
[INFO] [stdout]    |                                    mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `char_counts` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/two.rs:14:32
[INFO] [stdout]    |
[INFO] [stdout] 13 |             match char_counts.get(&chr) {
[INFO] [stdout]    |                   ----------- immutable borrow occurs here
[INFO] [stdout] 14 |                 Some(count) => char_counts.insert(chr, count + 1),
[INFO] [stdout]    |                                ^^^^^^^^^^^             ----- immutable borrow later used here
[INFO] [stdout]    |                                |
[INFO] [stdout]    |                                mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `use_counts` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/three.rs:70:36
[INFO] [stdout]    |
[INFO] [stdout] 69 |                 match use_counts.get(&key) {
[INFO] [stdout]    |                       ---------- immutable borrow occurs here
[INFO] [stdout] 70 |                     Some(count) => use_counts.insert(key, count + 1),
[INFO] [stdout]    |                                    ^^^^^^^^^^             ----- immutable borrow later used here
[INFO] [stdout]    |                                    |
[INFO] [stdout]    |                                    mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "8b6e0a1cdd88629f19fe4de6da520b345d0507938d113e6561ea00f0b8f96fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b6e0a1cdd88629f19fe4de6da520b345d0507938d113e6561ea00f0b8f96fda", kill_on_drop: false }`
[INFO] [stdout] 8b6e0a1cdd88629f19fe4de6da520b345d0507938d113e6561ea00f0b8f96fda