[INFO] cloning repository https://github.com/antono/aoc2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/antono/aoc2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fantono%2Faoc2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fantono%2Faoc2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d6eba81dc96e7bed460e69e22d0aa8f80dfb4652
[INFO] checking antono/aoc2018 against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fantono%2Faoc2018" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/antono/aoc2018
[INFO] finished tweaking git repo https://github.com/antono/aoc2018
[INFO] tweaked toml for git repo https://github.com/antono/aoc2018 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/antono/aoc2018 on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/antono/aoc2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ea30634fb9d38588023ef5cdd92f38646e2fa1a3a01dd184705c0f8eaa21d42
[INFO] running `Command { std: "docker" "start" "-a" "4ea30634fb9d38588023ef5cdd92f38646e2fa1a3a01dd184705c0f8eaa21d42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ea30634fb9d38588023ef5cdd92f38646e2fa1a3a01dd184705c0f8eaa21d42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ea30634fb9d38588023ef5cdd92f38646e2fa1a3a01dd184705c0f8eaa21d42", kill_on_drop: false }`
[INFO] [stdout] 4ea30634fb9d38588023ef5cdd92f38646e2fa1a3a01dd184705c0f8eaa21d42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 694f56e03ab6aaeb8e43ac3aaa2dbbe1daa3d7218931bfb3dc0324f6e888ac80
[INFO] running `Command { std: "docker" "start" "-a" "694f56e03ab6aaeb8e43ac3aaa2dbbe1daa3d7218931bfb3dc0324f6e888ac80", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]    Compiling unindent v0.1.3
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]     Checking time v0.1.41
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]    Compiling proc-macro-hack v0.5.4
[INFO] [stderr]    Compiling indoc-impl v0.3.1
[INFO] [stderr]     Checking indoc v0.3.1
[INFO] [stderr]     Checking aoc2018 v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/bin/4.rs:203:32
[INFO] [stdout]     |
[INFO] [stdout] 203 |         for shift_timelines in records.get(key) {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 203 -         for shift_timelines in records.get(key) {
[INFO] [stdout] 203 +         while let Some(shift_timelines) = records.get(key) {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 203 -         for shift_timelines in records.get(key) {
[INFO] [stdout] 203 +         if let Some(shift_timelines) = records.get(key) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/bin/4.rs:203:32
[INFO] [stdout]     |
[INFO] [stdout] 203 |         for shift_timelines in records.get(key) {
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 203 -         for shift_timelines in records.get(key) {
[INFO] [stdout] 203 +         while let Some(shift_timelines) = records.get(key) {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 203 -         for shift_timelines in records.get(key) {
[INFO] [stdout] 203 +         if let Some(shift_timelines) = records.get(key) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `topological_sort` is never used
[INFO] [stdout]    --> src/bin/7.rs:170:12
[INFO] [stdout]     |
[INFO] [stdout] 132 | impl DAG {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 170 |     pub fn topological_sort(&mut self) -> Vec<Letter> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_char` is never used
[INFO] [stdout]    --> src/bin/7.rs:291:8
[INFO] [stdout]     |
[INFO] [stdout] 281 | impl Letter {
[INFO] [stdout]     | ----------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 291 |     fn from_char(char: char) -> Letter {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.49s
[INFO] running `Command { std: "docker" "inspect" "694f56e03ab6aaeb8e43ac3aaa2dbbe1daa3d7218931bfb3dc0324f6e888ac80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "694f56e03ab6aaeb8e43ac3aaa2dbbe1daa3d7218931bfb3dc0324f6e888ac80", kill_on_drop: false }`
[INFO] [stdout] 694f56e03ab6aaeb8e43ac3aaa2dbbe1daa3d7218931bfb3dc0324f6e888ac80