[INFO] updating cached repository https://github.com/danrspencer/adventofcode2019
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 07c8be5edbed2441f180e2afb70a863a10b4b633
[INFO] testing danrspencer/adventofcode2019 against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanrspencer%2Fadventofcode2019" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danrspencer/adventofcode2019 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/danrspencer/adventofcode2019
[INFO] finished tweaking git repo https://github.com/danrspencer/adventofcode2019
[INFO] tweaked toml for git repo https://github.com/danrspencer/adventofcode2019 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/danrspencer/adventofcode2019 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5beb2322dac820ec29b2bbbe70e57c8407f033a0c5b6c36ed56c399bc3d1e78a
[INFO] running `Command { std: "docker" "start" "-a" "5beb2322dac820ec29b2bbbe70e57c8407f033a0c5b6c36ed56c399bc3d1e78a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5beb2322dac820ec29b2bbbe70e57c8407f033a0c5b6c36ed56c399bc3d1e78a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5beb2322dac820ec29b2bbbe70e57c8407f033a0c5b6c36ed56c399bc3d1e78a", kill_on_drop: false }`
[INFO] [stdout] 5beb2322dac820ec29b2bbbe70e57c8407f033a0c5b6c36ed56c399bc3d1e78a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4c39d538aff379374b4bcce2d96692ad4600193294f0915687dd96c13349785
[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" "a4c39d538aff379374b4bcce2d96692ad4600193294f0915687dd96c13349785", kill_on_drop: false }`
[INFO] [stderr]    Compiling adventofcode2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0502]: cannot borrow `program` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/day2.rs:40:56
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let operation = program.get(pointer);
[INFO] [stdout]    |                         ------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 40 |         let output = program.get(pointer + 3).and_then(|op| program.get_mut(*op));
[INFO] [stdout]    |                                                        ^^^^ ------- second borrow occurs due to use of `program` in closure
[INFO] [stdout]    |                                                        |
[INFO] [stdout]    |                                                        mutable borrow occurs here
[INFO] [stdout] 41 | 
[INFO] [stdout] 42 |         let result = match operation {
[INFO] [stdout]    |                            --------- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `adventofcode2019`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "a4c39d538aff379374b4bcce2d96692ad4600193294f0915687dd96c13349785", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4c39d538aff379374b4bcce2d96692ad4600193294f0915687dd96c13349785", kill_on_drop: false }`
[INFO] [stdout] a4c39d538aff379374b4bcce2d96692ad4600193294f0915687dd96c13349785