[INFO] cloning repository https://github.com/cargillchantry/advent-code-2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cargillchantry/advent-code-2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcargillchantry%2Fadvent-code-2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcargillchantry%2Fadvent-code-2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fa7eb0b6f85a450c3a21a1c92b28162b6c2f5f80
[INFO] checking cargillchantry/advent-code-2020 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcargillchantry%2Fadvent-code-2020" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cargillchantry/advent-code-2020 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cargillchantry/advent-code-2020
[INFO] finished tweaking git repo https://github.com/cargillchantry/advent-code-2020
[INFO] tweaked toml for git repo https://github.com/cargillchantry/advent-code-2020 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cargillchantry/advent-code-2020 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2646a1b863768f1597e275cec017611c37a124f6335f7164b5c28ce268b87931
[INFO] running `Command { std: "docker" "start" "-a" "2646a1b863768f1597e275cec017611c37a124f6335f7164b5c28ce268b87931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2646a1b863768f1597e275cec017611c37a124f6335f7164b5c28ce268b87931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2646a1b863768f1597e275cec017611c37a124f6335f7164b5c28ce268b87931", kill_on_drop: false }`
[INFO] [stdout] 2646a1b863768f1597e275cec017611c37a124f6335f7164b5c28ce268b87931
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17aad9ccb47fad0059fc1097d9144afd0fafcff966bb5043c4c09d3c6573bb39
[INFO] running `Command { std: "docker" "start" "-a" "17aad9ccb47fad0059fc1097d9144afd0fafcff966bb5043c4c09d3c6573bb39", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking advent-2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `index_adjustment`
[INFO] [stdout]    --> src/day_twenty.rs:162:21
[INFO] [stdout]     |
[INFO] [stdout] 162 |     let (transform, index_adjustment) =
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_index_adjustment`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `FlipX`, `FlipY`, and `FlipXY` are never constructed
[INFO] [stdout]   --> src/day_twenty.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Flip {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 14 |     FlipX, FlipY, FlipXY, Identity
[INFO] [stdout]    |     ^^^^^  ^^^^^  ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Flip` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `FlipSide` is never used
[INFO] [stdout]    --> src/day_twenty.rs:139:7
[INFO] [stdout]     |
[INFO] [stdout] 139 | trait FlipSide {
[INFO] [stdout]     |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index_adjustment`
[INFO] [stdout]    --> src/day_twenty.rs:162:21
[INFO] [stdout]     |
[INFO] [stdout] 162 |     let (transform, index_adjustment) =
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_index_adjustment`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `FlipX`, `FlipY`, and `FlipXY` are never constructed
[INFO] [stdout]   --> src/day_twenty.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Flip {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 14 |     FlipX, FlipY, FlipXY, Identity
[INFO] [stdout]    |     ^^^^^  ^^^^^  ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Flip` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `FlipSide` is never used
[INFO] [stdout]    --> src/day_twenty.rs:139:7
[INFO] [stdout]     |
[INFO] [stdout] 139 | trait FlipSide {
[INFO] [stdout]     |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.88s
[INFO] running `Command { std: "docker" "inspect" "17aad9ccb47fad0059fc1097d9144afd0fafcff966bb5043c4c09d3c6573bb39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17aad9ccb47fad0059fc1097d9144afd0fafcff966bb5043c4c09d3c6573bb39", kill_on_drop: false }`
[INFO] [stdout] 17aad9ccb47fad0059fc1097d9144afd0fafcff966bb5043c4c09d3c6573bb39
[INFO] checking cargillchantry/advent-code-2020 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcargillchantry%2Fadvent-code-2020" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cargillchantry/advent-code-2020 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cargillchantry/advent-code-2020
[INFO] finished tweaking git repo https://github.com/cargillchantry/advent-code-2020
[INFO] tweaked toml for git repo https://github.com/cargillchantry/advent-code-2020 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/cargillchantry/advent-code-2020 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 996055516f49161529a9fa03169db41111c7a65ca62db71d1a7158ddef9f497e
[INFO] running `Command { std: "docker" "start" "-a" "996055516f49161529a9fa03169db41111c7a65ca62db71d1a7158ddef9f497e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "996055516f49161529a9fa03169db41111c7a65ca62db71d1a7158ddef9f497e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "996055516f49161529a9fa03169db41111c7a65ca62db71d1a7158ddef9f497e", kill_on_drop: false }`
[INFO] [stdout] 996055516f49161529a9fa03169db41111c7a65ca62db71d1a7158ddef9f497e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f773d4efa00a21f4c488ef9316051a03cf1898eb61164b5dff689802b489df3e
[INFO] running `Command { std: "docker" "start" "-a" "f773d4efa00a21f4c488ef9316051a03cf1898eb61164b5dff689802b489df3e", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.4.2/src/exec.rs:836:13
[INFO] [stdout]     |
[INFO] [stdout] 836 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 837 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 838 | |                 self.cache.value(),
[INFO] [stdout] 839 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 850 | |                 Quit => return Some(Quit),
[INFO] [stdout] 851 | |             };
[INFO] [stdout]     | |_____________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regex` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f773d4efa00a21f4c488ef9316051a03cf1898eb61164b5dff689802b489df3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f773d4efa00a21f4c488ef9316051a03cf1898eb61164b5dff689802b489df3e", kill_on_drop: false }`
[INFO] [stdout] f773d4efa00a21f4c488ef9316051a03cf1898eb61164b5dff689802b489df3e