[INFO] cloning repository https://github.com/utkarshkukreti/draco-starter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/utkarshkukreti/draco-starter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Futkarshkukreti%2Fdraco-starter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Futkarshkukreti%2Fdraco-starter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0d01e691013d0a6f2de60cdbbc54a235a76ab095
[INFO] checking utkarshkukreti/draco-starter against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Futkarshkukreti%2Fdraco-starter" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/utkarshkukreti/draco-starter 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/utkarshkukreti/draco-starter
[INFO] finished tweaking git repo https://github.com/utkarshkukreti/draco-starter
[INFO] tweaked toml for git repo https://github.com/utkarshkukreti/draco-starter written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/utkarshkukreti/draco-starter 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 wasm-bindgen v0.2.25
[INFO] [stderr]   Downloaded wincolor v1.0.1
[INFO] [stderr]   Downloaded termcolor v1.0.4
[INFO] [stderr]   Downloaded sourcefile v0.1.4
[INFO] [stderr]   Downloaded failure_derive v0.1.3
[INFO] [stderr]   Downloaded wasm-bindgen-webidl v0.2.19
[INFO] [stderr]   Downloaded byteorder v1.2.6
[INFO] [stderr]   Downloaded quick-error v1.2.2
[INFO] [stderr]   Downloaded humantime v1.1.1
[INFO] [stderr]   Downloaded env_logger v0.5.13
[INFO] [stderr]   Downloaded cc v1.0.25
[INFO] [stderr]   Downloaded regex-syntax v0.6.2
[INFO] [stderr]   Downloaded web-sys v0.3.2
[INFO] [stderr]   Downloaded libc v0.2.43
[INFO] [stderr]   Downloaded backtrace-sys v0.1.24
[INFO] [stderr]   Downloaded regex v1.0.5
[INFO] [stderr]   Downloaded nom v4.1.1
[INFO] [stderr]   Downloaded memchr v2.1.0
[INFO] [stderr]   Downloaded proc-macro2 v0.4.20
[INFO] [stderr]   Downloaded serde v1.0.80
[INFO] [stderr]   Downloaded backtrace v0.3.9
[INFO] [stderr]   Downloaded int_hash v0.1.1
[INFO] [stderr]   Downloaded ryu v0.2.6
[INFO] [stderr]   Downloaded serde_json v1.0.32
[INFO] [stderr]   Downloaded js-sys v0.3.2
[INFO] [stderr]   Downloaded syn v0.15.13
[INFO] [stderr]   Downloaded aho-corasick v0.6.8
[INFO] [stderr]   Downloaded winapi-util v0.1.1
[INFO] [stderr]   Downloaded failure v0.1.3
[INFO] [stderr]   Downloaded weedle v0.8.0
[INFO] [stderr]   Downloaded serde_derive v1.0.80
[INFO] [stderr]   Downloaded utf8-ranges v1.0.1
[INFO] [stderr]   Downloaded rustc-demangle v0.1.9
[INFO] [stderr]   Downloaded synstructure v0.10.0
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.25
[INFO] [stderr]   Downloaded draco v0.1.0
[INFO] [stderr]   Downloaded lazy_static v1.1.0
[INFO] [stderr]   Downloaded log v0.4.5
[INFO] [stderr]   Downloaded quote v0.6.8
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.25
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.25
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2fd094cfb77b45a3f8c789986939045a4cc51e26a29ec2424ac6d9b6a7096e83
[INFO] running `Command { std: "docker" "start" "-a" "2fd094cfb77b45a3f8c789986939045a4cc51e26a29ec2424ac6d9b6a7096e83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fd094cfb77b45a3f8c789986939045a4cc51e26a29ec2424ac6d9b6a7096e83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fd094cfb77b45a3f8c789986939045a4cc51e26a29ec2424ac6d9b6a7096e83", kill_on_drop: false }`
[INFO] [stdout] 2fd094cfb77b45a3f8c789986939045a4cc51e26a29ec2424ac6d9b6a7096e83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2bbc8ad58f7621fb151ac37948ec3967cb60faef81f6bdebe458adf59784511f
[INFO] running `Command { std: "docker" "start" "-a" "2bbc8ad58f7621fb151ac37948ec3967cb60faef81f6bdebe458adf59784511f", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.25
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.9
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling wasm-bindgen v0.2.25
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling heck v0.3.0
[INFO] [stderr]     Checking int_hash v0.1.1
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling nom v4.1.1
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.15.13
[INFO] [stderr]    Compiling weedle v0.8.0
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling serde_json v1.0.32
[INFO] [stderr]    Compiling synstructure v0.10.0
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling failure v0.1.3
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.25
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.25
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.19
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.25
[INFO] [stderr]    Compiling web-sys v0.3.2
[INFO] [stderr]     Checking js-sys v0.3.2
[INFO] [stderr]     Checking draco v0.1.0
[INFO] [stderr]     Checking draco-starter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.32s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v4.1.1, wasm-bindgen v0.2.25
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "2bbc8ad58f7621fb151ac37948ec3967cb60faef81f6bdebe458adf59784511f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bbc8ad58f7621fb151ac37948ec3967cb60faef81f6bdebe458adf59784511f", kill_on_drop: false }`
[INFO] [stdout] 2bbc8ad58f7621fb151ac37948ec3967cb60faef81f6bdebe458adf59784511f
[INFO] checking utkarshkukreti/draco-starter against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Futkarshkukreti%2Fdraco-starter" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/utkarshkukreti/draco-starter 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/utkarshkukreti/draco-starter
[INFO] finished tweaking git repo https://github.com/utkarshkukreti/draco-starter
[INFO] tweaked toml for git repo https://github.com/utkarshkukreti/draco-starter written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/utkarshkukreti/draco-starter 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] fc2142a894e3d85091f075c0a1a5d2889f23e1890ff5d041099bd2800344d857
[INFO] running `Command { std: "docker" "start" "-a" "fc2142a894e3d85091f075c0a1a5d2889f23e1890ff5d041099bd2800344d857", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc2142a894e3d85091f075c0a1a5d2889f23e1890ff5d041099bd2800344d857", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc2142a894e3d85091f075c0a1a5d2889f23e1890ff5d041099bd2800344d857", kill_on_drop: false }`
[INFO] [stdout] fc2142a894e3d85091f075c0a1a5d2889f23e1890ff5d041099bd2800344d857
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 37bd652f8bbd05693a5df578076e2de3175f7a291471f0d3d47f41272d68559b
[INFO] running `Command { std: "docker" "start" "-a" "37bd652f8bbd05693a5df578076e2de3175f7a291471f0d3d47f41272d68559b", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.25
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.9
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling wasm-bindgen v0.2.25
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling heck v0.3.0
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]     Checking int_hash v0.1.1
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling nom v4.1.1
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling syn v0.15.13
[INFO] [stderr]    Compiling weedle v0.8.0
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/regex-1.0.5/src/exec.rs:754:13
[INFO] [stdout]     |
[INFO] [stdout] 754 | /             match dfa::Fsm::reverse(
[INFO] [stdout] 755 | |                 &self.ro.dfa_reverse,
[INFO] [stdout] 756 | |                 self.cache,
[INFO] [stdout] 757 | |                 false,
[INFO] [stdout] ...   |
[INFO] [stdout] 764 | |                 Quit => return Some(Quit),
[INFO] [stdout] 765 | |             };
[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] running `Command { std: "docker" "inspect" "37bd652f8bbd05693a5df578076e2de3175f7a291471f0d3d47f41272d68559b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37bd652f8bbd05693a5df578076e2de3175f7a291471f0d3d47f41272d68559b", kill_on_drop: false }`
[INFO] [stdout] 37bd652f8bbd05693a5df578076e2de3175f7a291471f0d3d47f41272d68559b