[INFO] cloning repository https://github.com/aki-akaguma/aki-mline
[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-mline" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faki-akaguma%2Faki-mline", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faki-akaguma%2Faki-mline'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 972bd3cd476ac11bf05881d97fd328466c9b7475
[INFO] checking aki-akaguma/aki-mline 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-mline" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aki-akaguma/aki-mline 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-5-tc1/source/.cargo/config
[INFO] started tweaking git repo https://github.com/aki-akaguma/aki-mline
[INFO] finished tweaking git repo https://github.com/aki-akaguma/aki-mline
[INFO] tweaked toml for git repo https://github.com/aki-akaguma/aki-mline written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/aki-akaguma/aki-mline 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 naive_opt v0.1.22
[INFO] [stderr]   Downloaded exec-target v0.2.8
[INFO] [stderr]   Downloaded indoc v1.0.9
[INFO] [stderr]   Downloaded memx-cdy v0.1.11
[INFO] [stderr]   Downloaded memx v0.1.25
[INFO] [stderr]   Downloaded case v1.0.0
[INFO] [stderr]   Downloaded flood-tide-gen v0.1.20
[INFO] [stderr]   Downloaded flood-tide v0.2.9
[INFO] [stderr]   Downloaded runnel v0.3.16
[INFO] [stderr]   Downloaded rust-version-info-file v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 2e87d32b1415d153bcb39b4fb2bbb7c79e099461128432ce0a6bd0628bc0cb4d
[INFO] running `Command { std: "docker" "start" "-a" "2e87d32b1415d153bcb39b4fb2bbb7c79e099461128432ce0a6bd0628bc0cb4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e87d32b1415d153bcb39b4fb2bbb7c79e099461128432ce0a6bd0628bc0cb4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e87d32b1415d153bcb39b4fb2bbb7c79e099461128432ce0a6bd0628bc0cb4d", kill_on_drop: false }`
[INFO] [stdout] 2e87d32b1415d153bcb39b4fb2bbb7c79e099461128432ce0a6bd0628bc0cb4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 61b02f454845c285dbc328a2b5f1601590d0745d67aad2f02da15ff41ec0f03c
[INFO] running `Command { std: "docker" "start" "-a" "61b02f454845c285dbc328a2b5f1601590d0745d67aad2f02da15ff41ec0f03c", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.16
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]    Compiling libc v0.2.139
[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]    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]     Checking aho-corasick v0.7.20
[INFO] [stderr]    Compiling memx v0.1.25
[INFO] [stderr]    Compiling runnel v0.3.16
[INFO] [stderr]    Compiling aki-mline v0.1.31 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking memx-cdy v0.1.11
[INFO] [stderr]     Checking naive_opt v0.1.22
[INFO] [stderr]     Checking regex v1.7.1
[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_color_when::OptColorWhenParseError`
[INFO] [stdout]  --> src/util/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use self::opt_color_when::OptColorWhenParseError;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::opt_around_num::OptAroundNumParseError`
[INFO] [stdout]   --> src/util/mod.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use self::opt_around_num::OptAroundNumParseError;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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: unused import: `self::opt_color_when::OptColorWhenParseError`
[INFO] [stdout]  --> src/util/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use self::opt_color_when::OptColorWhenParseError;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::opt_around_num::OptAroundNumParseError`
[INFO] [stdout]   --> src/util/mod.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use self::opt_around_num::OptAroundNumParseError;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "61b02f454845c285dbc328a2b5f1601590d0745d67aad2f02da15ff41ec0f03c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61b02f454845c285dbc328a2b5f1601590d0745d67aad2f02da15ff41ec0f03c", kill_on_drop: false }`
[INFO] [stdout] 61b02f454845c285dbc328a2b5f1601590d0745d67aad2f02da15ff41ec0f03c
[INFO] checking aki-akaguma/aki-mline 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-mline" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aki-akaguma/aki-mline 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-5-tc2/source/.cargo/config
[INFO] started tweaking git repo https://github.com/aki-akaguma/aki-mline
[INFO] finished tweaking git repo https://github.com/aki-akaguma/aki-mline
[INFO] tweaked toml for git repo https://github.com/aki-akaguma/aki-mline written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/aki-akaguma/aki-mline 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 615e637b1e94554f2df0a7bad27a70bdb2ddc2681d07afb7b0b69b75fe8634b6
[INFO] running `Command { std: "docker" "start" "-a" "615e637b1e94554f2df0a7bad27a70bdb2ddc2681d07afb7b0b69b75fe8634b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "615e637b1e94554f2df0a7bad27a70bdb2ddc2681d07afb7b0b69b75fe8634b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "615e637b1e94554f2df0a7bad27a70bdb2ddc2681d07afb7b0b69b75fe8634b6", kill_on_drop: false }`
[INFO] [stdout] 615e637b1e94554f2df0a7bad27a70bdb2ddc2681d07afb7b0b69b75fe8634b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 8651e0cf10bf814920c39c5b99ff00fa314d1e3df530e10c8f9d385abf8fab47
[INFO] running `Command { std: "docker" "start" "-a" "8651e0cf10bf814920c39c5b99ff00fa314d1e3df530e10c8f9d385abf8fab47", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.16
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]    Compiling libc v0.2.139
[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]    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]     Checking aho-corasick v0.7.20
[INFO] [stderr]    Compiling memx v0.1.25
[INFO] [stderr]    Compiling runnel v0.3.16
[INFO] [stderr]    Compiling aki-mline v0.1.31 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking memx-cdy v0.1.11
[INFO] [stderr]     Checking naive_opt v0.1.22
[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" "8651e0cf10bf814920c39c5b99ff00fa314d1e3df530e10c8f9d385abf8fab47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8651e0cf10bf814920c39c5b99ff00fa314d1e3df530e10c8f9d385abf8fab47", kill_on_drop: false }`
[INFO] [stdout] 8651e0cf10bf814920c39c5b99ff00fa314d1e3df530e10c8f9d385abf8fab47