[INFO] cloning repository https://github.com/nrxus/advent_of_code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nrxus/advent_of_code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrxus%2Fadvent_of_code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrxus%2Fadvent_of_code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b038001d31bc6171e29bf2ac963c8067bf692333
[INFO] building nrxus/advent_of_code against master#881c1ac408d93bb7adaa3a51dabab9266e82eee8 for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrxus%2Fadvent_of_code" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nrxus/advent_of_code on toolchain 881c1ac408d93bb7adaa3a51dabab9266e82eee8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nrxus/advent_of_code
[INFO] finished tweaking git repo https://github.com/nrxus/advent_of_code
[INFO] tweaked toml for git repo https://github.com/nrxus/advent_of_code written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/nrxus/advent_of_code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded array-macro v1.0.5
[INFO] [stderr]   Downloaded standback v0.2.13
[INFO] [stderr]   Downloaded time v0.2.23
[INFO] [stderr]   Downloaded enum-map v0.6.4
[INFO] [stderr]   Downloaded enum-map-derive v0.4.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "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] 5b8ba4e78ba726016f1694882d5b93b11a0d61aaadb60e102f3297210e8e7603
[INFO] running `Command { std: "docker" "start" "-a" "5b8ba4e78ba726016f1694882d5b93b11a0d61aaadb60e102f3297210e8e7603", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b8ba4e78ba726016f1694882d5b93b11a0d61aaadb60e102f3297210e8e7603", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b8ba4e78ba726016f1694882d5b93b11a0d61aaadb60e102f3297210e8e7603", kill_on_drop: false }`
[INFO] [stdout] 5b8ba4e78ba726016f1694882d5b93b11a0d61aaadb60e102f3297210e8e7603
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 003dc2cefc0269a3a64bba31c8ac823a0c0ea3c7a60669199f9090545b7d7ce9
[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" "003dc2cefc0269a3a64bba31c8ac823a0c0ea3c7a60669199f9090545b7d7ce9", kill_on_drop: false }`
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_01a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_01a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_01a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_01b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_01b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_01b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_02a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_02a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_02a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_02b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_02b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_02b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_03a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_03a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_03a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_03b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_03b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_03b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_04a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_04a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_04a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_04b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_04b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_04b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_05a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_05a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_05a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_05b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_05b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_05b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_06a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_06a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_06a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_06b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_06b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_06b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_07a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_07a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_07a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_07b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_07b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_07b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_08a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_08a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_08a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_08b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_08b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_08b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_09a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_09a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_09a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_09b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_09b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_09b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_10a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_10a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_10a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_10b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_10b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_10b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_11a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_11a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_11a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_11b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_11b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_11b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_12a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_12a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_12a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_12b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_12b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_12b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_13a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_13a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_13a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_13b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_13b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_13b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_14a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_14a` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_14a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_14b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)` has the same output filename as the bin target `day_14b` in package `twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_14b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_01a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_01a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_01a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_01b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_01b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_01b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_02a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_02a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_02a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_02b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_02b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_02b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_03a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_03a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_03a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_03b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_03b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_03b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_04a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_04a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_04a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_04b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_04b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_04b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_05a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_05a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_05a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_05b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)` has the same output filename as the bin target `day_05b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_05b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_01a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_01a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_01a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_01b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_01b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_01b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_02a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_02a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_02a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_02b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_02b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_02b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_03a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_03a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_03a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_03b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_03b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_03b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_04a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_04a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_04a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_04b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_04b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_04b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_05a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_05a` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_05a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_05b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_05b` in package `twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_05b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_06a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_06a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_06a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_06b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_06b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_06b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_07a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_07a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_07a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_07b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_07b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_07b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_08a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_08a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_08a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_08b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_08b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_08b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_09a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_09a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_09a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_09b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_09b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_09b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_10a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_10a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_10a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_10b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_10b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_10b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_11a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_11a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_11a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_11b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_11b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_11b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_12a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_12a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_12a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_12b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_12b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_12b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_13a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_13a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_13a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_13b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_13b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_13b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_14a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_14a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_14a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_14b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_14b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_14b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_15a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_15a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_15a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_15b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_15b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_15b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_16a` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_16a` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_16a
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `day_16b` in package `twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)` has the same output filename as the bin target `day_16b` in package `twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/debug/day_16b
[INFO] [stderr] The targets should have unique names.
[INFO] [stderr] Consider changing their names to be unique or compiling them separately.
[INFO] [stderr] This may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling common v0.1.0 (/opt/rustwide/workdir/common)
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling array-macro v1.0.5
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling futures-core v0.3.8
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling pin-project-lite v0.1.11
[INFO] [stderr]    Compiling pin-project-lite v0.2.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]    Compiling futures-task v0.3.8
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling futures-sink v0.3.8
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling try-lock v0.2.2
[INFO] [stderr]    Compiling encoding_rs v0.8.20
[INFO] [stderr]    Compiling httpdate v0.3.2
[INFO] [stderr]    Compiling tower-service v0.3.0
[INFO] [stderr]    Compiling mime v0.3.14
[INFO] [stderr]    Compiling funty v1.0.1
[INFO] [stderr]    Compiling tap v1.0.0
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling base64 v0.13.0
[INFO] [stderr]    Compiling strum v0.20.0
[INFO] [stderr]    Compiling intcode v0.1.0 (/opt/rustwide/workdir/intcode)
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]    Compiling standback v0.2.13
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling time v0.2.23
[INFO] [stderr]    Compiling cookie v0.14.3
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling tracing-core v0.1.17
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling futures-channel v0.3.8
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling http v0.2.1
[INFO] [stderr]    Compiling form_urlencoded v1.0.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.8
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling tracing v0.1.22
[INFO] [stderr]    Compiling bitvec v0.19.4
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling openssl-sys v0.9.51
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling socket2 v0.3.17
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling tokio v0.2.23
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling url v2.2.0
[INFO] [stderr]    Compiling http-body v0.3.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)
[INFO] [stderr]    Compiling twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)
[INFO] [stderr]    Compiling twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-1.0.53/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' -C metadata=c2323e542eb5564f -C extra-filename=-c2323e542eb5564f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-2d492171d79c8fc1.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-c83ede9efebeed7b.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-e196087a89e1a4e5.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "003dc2cefc0269a3a64bba31c8ac823a0c0ea3c7a60669199f9090545b7d7ce9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "003dc2cefc0269a3a64bba31c8ac823a0c0ea3c7a60669199f9090545b7d7ce9", kill_on_drop: false }`
[INFO] [stdout] 003dc2cefc0269a3a64bba31c8ac823a0c0ea3c7a60669199f9090545b7d7ce9
