[INFO] cloning repository https://github.com/helios-lang/helios-fmt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/helios-lang/helios-fmt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelios-lang%2Fhelios-fmt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelios-lang%2Fhelios-fmt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d54177a52261493238ba31c61ca9876802eb3d8
[INFO] checking helios-lang/helios-fmt against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelios-lang%2Fhelios-fmt" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/helios-lang/helios-fmt 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/helios-lang/helios-fmt
[INFO] finished tweaking git repo https://github.com/helios-lang/helios-fmt
[INFO] tweaked toml for git repo https://github.com/helios-lang/helios-fmt written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/helios-lang/helios-fmt 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 git repository `https://github.com/helios-lang/helios`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rowan v0.10.0
[INFO] [stderr]   Downloaded terminal_size v0.1.15
[INFO] [stderr]   Downloaded dissimilar v1.0.2
[INFO] [stderr]   Downloaded text-size v1.0.0
[INFO] [stderr]   Downloaded textwrap v0.13.2
[INFO] [stderr]   Downloaded drop_bomb v0.1.5
[INFO] [stderr]   Downloaded smawk v0.3.0
[INFO] [stderr]   Downloaded expect-test v1.1.0
[INFO] [stderr]   Downloaded smol_str v0.1.17
[INFO] [stderr]   Downloaded thin-dst v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 1db590b6c5a95b185abb3b0d945d93ca4676e4f6e2ddadbc8d477a11929ad2dd
[INFO] running `Command { std: "docker" "start" "-a" "1db590b6c5a95b185abb3b0d945d93ca4676e4f6e2ddadbc8d477a11929ad2dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1db590b6c5a95b185abb3b0d945d93ca4676e4f6e2ddadbc8d477a11929ad2dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1db590b6c5a95b185abb3b0d945d93ca4676e4f6e2ddadbc8d477a11929ad2dd", kill_on_drop: false }`
[INFO] [stdout] 1db590b6c5a95b185abb3b0d945d93ca4676e4f6e2ddadbc8d477a11929ad2dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] bbb37180d320f32c8193d6f51709f3a8c9eec2bc14bc843ac51337f8a9e1b0d7
[INFO] running `Command { std: "docker" "start" "-a" "bbb37180d320f32c8193d6f51709f3a8c9eec2bc14bc843ac51337f8a9e1b0d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking text-size v1.0.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking smawk v0.3.0
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]     Checking smol_str v0.1.17
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking thin-dst v1.1.0
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking drop_bomb v0.1.5
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking expect-test v1.1.0
[INFO] [stderr]     Checking rowan v0.10.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking terminal_size v0.1.15
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking textwrap v0.13.2
[INFO] [stderr]     Checking helios-formatting v0.2.0 (https://github.com/helios-lang/helios?branch=develop#30a50d00)
[INFO] [stderr]     Checking helios-diagnostics v0.2.0 (https://github.com/helios-lang/helios?branch=develop#30a50d00)
[INFO] [stderr]     Checking helios-syntax v0.2.0 (https://github.com/helios-lang/helios?branch=develop#30a50d00)
[INFO] [stderr]     Checking helios-parser v0.2.0 (https://github.com/helios-lang/helios?branch=develop#30a50d00)
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking helios-fmt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `Command { std: "docker" "inspect" "bbb37180d320f32c8193d6f51709f3a8c9eec2bc14bc843ac51337f8a9e1b0d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbb37180d320f32c8193d6f51709f3a8c9eec2bc14bc843ac51337f8a9e1b0d7", kill_on_drop: false }`
[INFO] [stdout] bbb37180d320f32c8193d6f51709f3a8c9eec2bc14bc843ac51337f8a9e1b0d7
[INFO] checking helios-lang/helios-fmt against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhelios-lang%2Fhelios-fmt" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/helios-lang/helios-fmt 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/helios-lang/helios-fmt
[INFO] finished tweaking git repo https://github.com/helios-lang/helios-fmt
[INFO] tweaked toml for git repo https://github.com/helios-lang/helios-fmt written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/helios-lang/helios-fmt 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 0dc89942d97e97e8060822b5f07ab5c9576df3e35e87232802c64f11483db06c
[INFO] running `Command { std: "docker" "start" "-a" "0dc89942d97e97e8060822b5f07ab5c9576df3e35e87232802c64f11483db06c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0dc89942d97e97e8060822b5f07ab5c9576df3e35e87232802c64f11483db06c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dc89942d97e97e8060822b5f07ab5c9576df3e35e87232802c64f11483db06c", kill_on_drop: false }`
[INFO] [stdout] 0dc89942d97e97e8060822b5f07ab5c9576df3e35e87232802c64f11483db06c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 417d7403fa79bdc5b11de35a612b289c4f7e2a8d13dcb5914c6f07ea46db08a8
[INFO] running `Command { std: "docker" "start" "-a" "417d7403fa79bdc5b11de35a612b289c4f7e2a8d13dcb5914c6f07ea46db08a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking text-size v1.0.0
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]     Checking smawk v0.3.0
[INFO] [stderr]     Checking thin-dst v1.1.0
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking smol_str v0.1.17
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking drop_bomb v0.1.5
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking rowan v0.10.0
[INFO] [stderr]     Checking expect-test v1.1.0
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking terminal_size v0.1.15
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking textwrap v0.13.2
[INFO] [stderr]     Checking helios-formatting v0.2.0 (https://github.com/helios-lang/helios?branch=develop#30a50d00)
[INFO] [stderr]     Checking helios-syntax v0.2.0 (https://github.com/helios-lang/helios?branch=develop#30a50d00)
[INFO] [stderr]     Checking helios-diagnostics v0.2.0 (https://github.com/helios-lang/helios?branch=develop#30a50d00)
[INFO] [stderr]     Checking helios-parser v0.2.0 (https://github.com/helios-lang/helios?branch=develop#30a50d00)
[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" "417d7403fa79bdc5b11de35a612b289c4f7e2a8d13dcb5914c6f07ea46db08a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "417d7403fa79bdc5b11de35a612b289c4f7e2a8d13dcb5914c6f07ea46db08a8", kill_on_drop: false }`
[INFO] [stdout] 417d7403fa79bdc5b11de35a612b289c4f7e2a8d13dcb5914c6f07ea46db08a8