[INFO] fetching crate takyon 0.2.0...
[INFO] checking takyon-0.2.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate takyon 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate takyon 0.2.0 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 takyon 0.2.0
[INFO] finished tweaking crates.io crate takyon 0.2.0
[INFO] tweaked toml for crates.io crate takyon 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate takyon 0.2.0 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 nohash v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 38e0dfc5f05eb43889393b6a7f21243df3ab8c8214c21265fe36c2ba74c70769
[INFO] running `Command { std: "docker" "start" "-a" "38e0dfc5f05eb43889393b6a7f21243df3ab8c8214c21265fe36c2ba74c70769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38e0dfc5f05eb43889393b6a7f21243df3ab8c8214c21265fe36c2ba74c70769", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38e0dfc5f05eb43889393b6a7f21243df3ab8c8214c21265fe36c2ba74c70769", kill_on_drop: false }`
[INFO] [stdout] 38e0dfc5f05eb43889393b6a7f21243df3ab8c8214c21265fe36c2ba74c70769
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f1c1b54299bcfb99eac7940e2a1287e5d2db86f14bf08ba0f3deed461744264a
[INFO] running `Command { std: "docker" "start" "-a" "f1c1b54299bcfb99eac7940e2a1287e5d2db86f14bf08ba0f3deed461744264a", kill_on_drop: false }`
[INFO] [stderr]    Compiling io-uring v0.6.2
[INFO] [stderr]     Checking nohash v0.2.0
[INFO] [stderr]     Checking takyon v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "f1c1b54299bcfb99eac7940e2a1287e5d2db86f14bf08ba0f3deed461744264a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1c1b54299bcfb99eac7940e2a1287e5d2db86f14bf08ba0f3deed461744264a", kill_on_drop: false }`
[INFO] [stdout] f1c1b54299bcfb99eac7940e2a1287e5d2db86f14bf08ba0f3deed461744264a
[INFO] checking takyon-0.2.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate takyon 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate takyon 0.2.0 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 takyon 0.2.0
[INFO] finished tweaking crates.io crate takyon 0.2.0
[INFO] tweaked toml for crates.io crate takyon 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate takyon 0.2.0 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] ecd58d2d276b64ff1f7758a670e13fb2074a1587f2aed9f885b75d934a63bb9e
[INFO] running `Command { std: "docker" "start" "-a" "ecd58d2d276b64ff1f7758a670e13fb2074a1587f2aed9f885b75d934a63bb9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecd58d2d276b64ff1f7758a670e13fb2074a1587f2aed9f885b75d934a63bb9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecd58d2d276b64ff1f7758a670e13fb2074a1587f2aed9f885b75d934a63bb9e", kill_on_drop: false }`
[INFO] [stdout] ecd58d2d276b64ff1f7758a670e13fb2074a1587f2aed9f885b75d934a63bb9e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e280bd0d2f8ea001b1594a88fd6bb2865f1b11ed655de79fe3de6b7209f9e633
[INFO] running `Command { std: "docker" "start" "-a" "e280bd0d2f8ea001b1594a88fd6bb2865f1b11ed655de79fe3de6b7209f9e633", kill_on_drop: false }`
[INFO] [stderr]    Compiling io-uring v0.6.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking nohash v0.2.0
[INFO] [stderr]     Checking takyon v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> examples/tcp_server.rs:6:23
[INFO] [stdout]    |
[INFO] [stdout] 6  |       takyon::run(async {
[INFO] [stdout]    |  _______________________^
[INFO] [stdout] 7  | |         let sock = TcpListener::bind("127.0.0.1:5000").await.unwrap();
[INFO] [stdout] 8  | |
[INFO] [stdout] 9  | |         loop {
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }
[INFO] [stdout] 29 | |     });
[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 `takyon` (example "tcp_server") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e280bd0d2f8ea001b1594a88fd6bb2865f1b11ed655de79fe3de6b7209f9e633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e280bd0d2f8ea001b1594a88fd6bb2865f1b11ed655de79fe3de6b7209f9e633", kill_on_drop: false }`
[INFO] [stdout] e280bd0d2f8ea001b1594a88fd6bb2865f1b11ed655de79fe3de6b7209f9e633