[INFO] cloning repository https://github.com/aki-akaguma/aki-mcycle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aki-akaguma/aki-mcycle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faki-akaguma%2Faki-mcycle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faki-akaguma%2Faki-mcycle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dc1f02e5e1554c37e9f84b694cd154148d0ba754
[INFO] checking aki-akaguma/aki-mcycle against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faki-akaguma%2Faki-mcycle" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aki-akaguma/aki-mcycle 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] removed /workspace/builds/worker-0-tc1/source/.cargo/config
[INFO] started tweaking git repo https://github.com/aki-akaguma/aki-mcycle
[INFO] finished tweaking git repo https://github.com/aki-akaguma/aki-mcycle
[INFO] tweaked toml for git repo https://github.com/aki-akaguma/aki-mcycle written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/aki-akaguma/aki-mcycle 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 runnel v0.3.16
[INFO] [stderr]   Downloaded memx-cdy v0.1.11
[INFO] [stderr]   Downloaded flood-tide v0.2.9
[INFO] [stderr]   Downloaded case v1.0.0
[INFO] [stderr]   Downloaded flood-tide-gen v0.1.20
[INFO] [stderr]   Downloaded exec-target v0.2.8
[INFO] [stderr]   Downloaded memx v0.1.25
[INFO] [stderr]   Downloaded rust-version-info-file v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 48b976c00706656415939560b470c6d0ad8b41adbe7553539e6bef567fa8772d
[INFO] running `Command { std: "docker" "start" "-a" "48b976c00706656415939560b470c6d0ad8b41adbe7553539e6bef567fa8772d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48b976c00706656415939560b470c6d0ad8b41adbe7553539e6bef567fa8772d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48b976c00706656415939560b470c6d0ad8b41adbe7553539e6bef567fa8772d", kill_on_drop: false }`
[INFO] [stdout] 48b976c00706656415939560b470c6d0ad8b41adbe7553539e6bef567fa8772d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] ee71dbfe4b53281f008247d0519b79df48d0a094af54529adb4a59e1d8163b42
[INFO] running `Command { std: "docker" "start" "-a" "ee71dbfe4b53281f008247d0519b79df48d0a094af54529adb4a59e1d8163b42", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.16
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking cpufeatures v0.2.5
[INFO] [stderr]    Compiling rust-version-info-file v0.1.8
[INFO] [stderr]     Checking flood-tide v0.2.9
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking exec-target v0.2.8
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking case v1.0.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling memx v0.1.25
[INFO] [stderr]    Compiling runnel v0.3.16
[INFO] [stderr]    Compiling aki-mcycle v0.1.28 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking memx-cdy v0.1.11
[INFO] [stderr]     Checking flood-tide-gen v0.1.20
[INFO] [stdout] warning: unused import: `self::opt_uc_x_param::OptUcXParamParseError`
[INFO] [stdout]  --> src/util/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use self::opt_uc_x_param::OptUcXParamParseError;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::opt_uc_x_param::OptUcXParamParseError`
[INFO] [stdout]  --> src/util/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use self::opt_uc_x_param::OptUcXParamParseError;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.92s
[INFO] running `Command { std: "docker" "inspect" "ee71dbfe4b53281f008247d0519b79df48d0a094af54529adb4a59e1d8163b42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee71dbfe4b53281f008247d0519b79df48d0a094af54529adb4a59e1d8163b42", kill_on_drop: false }`
[INFO] [stdout] ee71dbfe4b53281f008247d0519b79df48d0a094af54529adb4a59e1d8163b42
[INFO] checking aki-akaguma/aki-mcycle against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faki-akaguma%2Faki-mcycle" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aki-akaguma/aki-mcycle 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] removed /workspace/builds/worker-0-tc2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/aki-akaguma/aki-mcycle
[INFO] finished tweaking git repo https://github.com/aki-akaguma/aki-mcycle
[INFO] tweaked toml for git repo https://github.com/aki-akaguma/aki-mcycle written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/aki-akaguma/aki-mcycle 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] d327efb1d18f174174b872613c1602655180e9b5b4b3aa205547ff53f170b801
[INFO] running `Command { std: "docker" "start" "-a" "d327efb1d18f174174b872613c1602655180e9b5b4b3aa205547ff53f170b801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d327efb1d18f174174b872613c1602655180e9b5b4b3aa205547ff53f170b801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d327efb1d18f174174b872613c1602655180e9b5b4b3aa205547ff53f170b801", kill_on_drop: false }`
[INFO] [stdout] d327efb1d18f174174b872613c1602655180e9b5b4b3aa205547ff53f170b801
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 53dbc09df6a871ab0422aaf7c85625199bc6c09541d1ce279a735dd44ebe1b99
[INFO] running `Command { std: "docker" "start" "-a" "53dbc09df6a871ab0422aaf7c85625199bc6c09541d1ce279a735dd44ebe1b99", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.16
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking cpufeatures v0.2.5
[INFO] [stderr]    Compiling rust-version-info-file v0.1.8
[INFO] [stderr]     Checking flood-tide v0.2.9
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking exec-target v0.2.8
[INFO] [stderr]     Checking case v1.0.0
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling memx v0.1.25
[INFO] [stderr]    Compiling runnel v0.3.16
[INFO] [stderr]    Compiling aki-mcycle v0.1.28 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking memx-cdy v0.1.11
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.7.1/src/exec.rs:848:13
[INFO] [stdout]     |
[INFO] [stdout] 848 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 849 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 850 | |                 self.cache.value(),
[INFO] [stdout] 851 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 862 | |                 Quit => return Some(Quit),
[INFO] [stdout] 863 | |             };
[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" "53dbc09df6a871ab0422aaf7c85625199bc6c09541d1ce279a735dd44ebe1b99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53dbc09df6a871ab0422aaf7c85625199bc6c09541d1ce279a735dd44ebe1b99", kill_on_drop: false }`
[INFO] [stdout] 53dbc09df6a871ab0422aaf7c85625199bc6c09541d1ce279a735dd44ebe1b99