[INFO] cloning repository https://github.com/ajfrantz/advent2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ajfrantz/advent2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajfrantz%2Fadvent2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajfrantz%2Fadvent2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cfabacdc3548efccb1d6501394d03f374ef14330
[INFO] checking ajfrantz/advent2019 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajfrantz%2Fadvent2019" "/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/ajfrantz/advent2019 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/ajfrantz/advent2019
[INFO] finished tweaking git repo https://github.com/ajfrantz/advent2019
[INFO] tweaked toml for git repo https://github.com/ajfrantz/advent2019 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ajfrantz/advent2019 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded once_cell v0.2.4
[INFO] [stderr]   Downloaded reformation v0.5.0
[INFO] [stderr]   Downloaded derive_more v0.13.0
[INFO] [stderr]   Downloaded reformation_derive v0.5.0
[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] e9f068d04d8a10e18d343786793efeb93db90a7c563619e531edae452336d05c
[INFO] running `Command { std: "docker" "start" "-a" "e9f068d04d8a10e18d343786793efeb93db90a7c563619e531edae452336d05c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9f068d04d8a10e18d343786793efeb93db90a7c563619e531edae452336d05c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9f068d04d8a10e18d343786793efeb93db90a7c563619e531edae452336d05c", kill_on_drop: false }`
[INFO] [stdout] e9f068d04d8a10e18d343786793efeb93db90a7c563619e531edae452336d05c
[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] c7c98d12c6e3fef81c473952015d3a986e5a86666c170757ff441b5a56cae0ea
[INFO] running `Command { std: "docker" "start" "-a" "c7c98d12c6e3fef81c473952015d3a986e5a86666c170757ff441b5a56cae0ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking maybe-uninit v2.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking lock_api v0.3.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]     Checking once_cell v0.2.4
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling reformation_derive v0.5.0
[INFO] [stderr]    Compiling derive_more v0.13.0
[INFO] [stderr]     Checking reformation v0.5.0
[INFO] [stderr]     Checking advent2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.63s
[INFO] running `Command { std: "docker" "inspect" "c7c98d12c6e3fef81c473952015d3a986e5a86666c170757ff441b5a56cae0ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7c98d12c6e3fef81c473952015d3a986e5a86666c170757ff441b5a56cae0ea", kill_on_drop: false }`
[INFO] [stdout] c7c98d12c6e3fef81c473952015d3a986e5a86666c170757ff441b5a56cae0ea
[INFO] checking ajfrantz/advent2019 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajfrantz%2Fadvent2019" "/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/ajfrantz/advent2019 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/ajfrantz/advent2019
[INFO] finished tweaking git repo https://github.com/ajfrantz/advent2019
[INFO] tweaked toml for git repo https://github.com/ajfrantz/advent2019 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ajfrantz/advent2019 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] 847e3586b37ecaf17e7d21c214bf66e516310e36c3f7f36fc3dc40b413258477
[INFO] running `Command { std: "docker" "start" "-a" "847e3586b37ecaf17e7d21c214bf66e516310e36c3f7f36fc3dc40b413258477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "847e3586b37ecaf17e7d21c214bf66e516310e36c3f7f36fc3dc40b413258477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "847e3586b37ecaf17e7d21c214bf66e516310e36c3f7f36fc3dc40b413258477", kill_on_drop: false }`
[INFO] [stdout] 847e3586b37ecaf17e7d21c214bf66e516310e36c3f7f36fc3dc40b413258477
[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] 736d567e442f490438f98e74c53e0890d9e9a2b9d2a8068a5c4ee0e9b66d1ab9
[INFO] running `Command { std: "docker" "start" "-a" "736d567e442f490438f98e74c53e0890d9e9a2b9d2a8068a5c4ee0e9b66d1ab9", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling num-bigint v0.2.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking lock_api v0.3.2
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]     Checking once_cell v0.2.4
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.3.1/src/exec.rs:838:13
[INFO] [stdout]     |
[INFO] [stdout] 838 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 839 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 840 | |                 self.cache.value(),
[INFO] [stdout] 841 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 852 | |                 Quit => return Some(Quit),
[INFO] [stdout] 853 | |             };
[INFO] [stdout]     | |_____________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.3.1/src/exec.rs:838:13
[INFO] [stdout]     |
[INFO] [stdout] 838 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 839 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 840 | |                 self.cache.value(),
[INFO] [stdout] 841 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 852 | |                 Quit => return Some(Quit),
[INFO] [stdout] 853 | |             };
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[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" "736d567e442f490438f98e74c53e0890d9e9a2b9d2a8068a5c4ee0e9b66d1ab9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "736d567e442f490438f98e74c53e0890d9e9a2b9d2a8068a5c4ee0e9b66d1ab9", kill_on_drop: false }`
[INFO] [stdout] 736d567e442f490438f98e74c53e0890d9e9a2b9d2a8068a5c4ee0e9b66d1ab9