[INFO] fetching crate syntax-rust 0.4.1...
[INFO] checking syntax-rust-0.4.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate syntax-rust 0.4.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate syntax-rust 0.4.1 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 crates.io crate syntax-rust 0.4.1
[INFO] finished tweaking crates.io crate syntax-rust 0.4.1
[INFO] tweaked toml for crates.io crate syntax-rust 0.4.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 30 packages
[INFO] [stderr]       Adding ansi_term v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding beef v0.4.4 (latest: v0.5.2)
[INFO] [stderr]       Adding ctor v0.1.26 (latest: v0.2.7)
[INFO] [stderr]       Adding heck v0.3.3 (latest: v0.5.0)
[INFO] [stderr]       Adding logos v0.11.4 (latest: v0.14.0)
[INFO] [stderr]       Adding logos-derive v0.11.5 (latest: v0.14.0)
[INFO] [stderr]       Adding pretty_assertions v0.6.1 (latest: v1.4.0)
[INFO] [stderr]       Adding regex-syntax v0.6.29 (latest: v0.8.3)
[INFO] [stderr]       Adding smol_str v0.1.24 (latest: v0.2.1)
[INFO] [stderr]       Adding strum v0.18.0 (latest: v0.26.2)
[INFO] [stderr]       Adding strum_macros v0.18.0 (latest: v0.26.2)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded dialect v0.4.1
[INFO] [stderr]   Downloaded beef v0.4.4
[INFO] [stderr]   Downloaded logos-derive v0.11.5
[INFO] [stderr]   Downloaded logos v0.11.4
[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] 74bd669b3ddf397fc2b56c5944b1f0e4f5d793cfb1e0a0f5648a67bc3354818e
[INFO] running `Command { std: "docker" "start" "-a" "74bd669b3ddf397fc2b56c5944b1f0e4f5d793cfb1e0a0f5648a67bc3354818e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74bd669b3ddf397fc2b56c5944b1f0e4f5d793cfb1e0a0f5648a67bc3354818e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74bd669b3ddf397fc2b56c5944b1f0e4f5d793cfb1e0a0f5648a67bc3354818e", kill_on_drop: false }`
[INFO] [stdout] 74bd669b3ddf397fc2b56c5944b1f0e4f5d793cfb1e0a0f5648a67bc3354818e
[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] 765215b647c3f89a6996a8ce6e1c97c825751beab8ef848cb7d6c86dcb092cce
[INFO] running `Command { std: "docker" "start" "-a" "765215b647c3f89a6996a8ce6e1c97c825751beab8ef848cb7d6c86dcb092cce", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling utf8-ranges v1.0.5
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking strum v0.18.0
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking smol_str v0.1.24
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stderr]     Checking dialect v0.4.1
[INFO] [stderr]     Checking logos v0.11.4
[INFO] [stderr]     Checking syntax-rust v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.48s
[INFO] running `Command { std: "docker" "inspect" "765215b647c3f89a6996a8ce6e1c97c825751beab8ef848cb7d6c86dcb092cce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "765215b647c3f89a6996a8ce6e1c97c825751beab8ef848cb7d6c86dcb092cce", kill_on_drop: false }`
[INFO] [stdout] 765215b647c3f89a6996a8ce6e1c97c825751beab8ef848cb7d6c86dcb092cce
[INFO] checking syntax-rust-0.4.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate syntax-rust 0.4.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate syntax-rust 0.4.1 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 crates.io crate syntax-rust 0.4.1
[INFO] finished tweaking crates.io crate syntax-rust 0.4.1
[INFO] tweaked toml for crates.io crate syntax-rust 0.4.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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] d13a633a24a787ad95f9962a45b94fb8d35facc8660aa87c1a22ee9ffde47eec
[INFO] running `Command { std: "docker" "start" "-a" "d13a633a24a787ad95f9962a45b94fb8d35facc8660aa87c1a22ee9ffde47eec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d13a633a24a787ad95f9962a45b94fb8d35facc8660aa87c1a22ee9ffde47eec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d13a633a24a787ad95f9962a45b94fb8d35facc8660aa87c1a22ee9ffde47eec", kill_on_drop: false }`
[INFO] [stdout] d13a633a24a787ad95f9962a45b94fb8d35facc8660aa87c1a22ee9ffde47eec
[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] 779e33f7bb1ad71e0b98e13fb424fe354464508de58d31f5c014f3ba989f97a8
[INFO] running `Command { std: "docker" "start" "-a" "779e33f7bb1ad71e0b98e13fb424fe354464508de58d31f5c014f3ba989f97a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]    Compiling utf8-ranges v1.0.5
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking strum v0.18.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking smol_str v0.1.24
[INFO] [stderr]    Compiling logos-derive v0.11.5
[INFO] [stderr]    Compiling strum_macros v0.18.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/logos-derive-0.11.5/src/mir.rs:103:21
[INFO] [stdout]     |
[INFO] [stdout] 103 |                     Err("#[regex]: non-greedy parsing is currently unsupported.")?;
[INFO] [stdout]     |                     ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 103 |                     Err::<T, &str>("#[regex]: non-greedy parsing is currently unsupported.")?;
[INFO] [stdout]     |                        +++++++++++
[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 `logos-derive` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "779e33f7bb1ad71e0b98e13fb424fe354464508de58d31f5c014f3ba989f97a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "779e33f7bb1ad71e0b98e13fb424fe354464508de58d31f5c014f3ba989f97a8", kill_on_drop: false }`
[INFO] [stdout] 779e33f7bb1ad71e0b98e13fb424fe354464508de58d31f5c014f3ba989f97a8