[INFO] fetching crate arl 0.2.0...
[INFO] checking arl-0.2.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate arl 0.2.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate arl 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 arl 0.2.0
[INFO] finished tweaking crates.io crate arl 0.2.0
[INFO] tweaked toml for crates.io crate arl 0.2.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate arl 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]  Downloading crates ...
[INFO] [stderr]   Downloaded hermit-abi v0.3.3
[INFO] [stderr]   Downloaded proc-macro2 v1.0.68
[INFO] [stderr]   Downloaded memchr v2.6.4
[INFO] [stderr]   Downloaded libc v0.2.148
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b547b59555495c7c69fd7be922899302e7ccc6b9c6aeecff03c4eb9ac5276ac9
[INFO] running `Command { std: "docker" "start" "-a" "b547b59555495c7c69fd7be922899302e7ccc6b9c6aeecff03c4eb9ac5276ac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b547b59555495c7c69fd7be922899302e7ccc6b9c6aeecff03c4eb9ac5276ac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b547b59555495c7c69fd7be922899302e7ccc6b9c6aeecff03c4eb9ac5276ac9", kill_on_drop: false }`
[INFO] [stdout] b547b59555495c7c69fd7be922899302e7ccc6b9c6aeecff03c4eb9ac5276ac9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] a26c23c4033ff584a1c209c89e64740a85e77266375983138c98dba986faf2fa
[INFO] running `Command { std: "docker" "start" "-a" "a26c23c4033ff584a1c209c89e64740a85e77266375983138c98dba986faf2fa", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.68
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]     Checking tokio v1.32.0
[INFO] [stderr]     Checking arl v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.95s
[INFO] running `Command { std: "docker" "inspect" "a26c23c4033ff584a1c209c89e64740a85e77266375983138c98dba986faf2fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a26c23c4033ff584a1c209c89e64740a85e77266375983138c98dba986faf2fa", kill_on_drop: false }`
[INFO] [stdout] a26c23c4033ff584a1c209c89e64740a85e77266375983138c98dba986faf2fa
[INFO] checking arl-0.2.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate arl 0.2.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate arl 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 arl 0.2.0
[INFO] finished tweaking crates.io crate arl 0.2.0
[INFO] tweaked toml for crates.io crate arl 0.2.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate arl 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 55dadafe9cfffd55042cec60993475971ea2020e19d0a1afda78f97cb087c679
[INFO] running `Command { std: "docker" "start" "-a" "55dadafe9cfffd55042cec60993475971ea2020e19d0a1afda78f97cb087c679", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55dadafe9cfffd55042cec60993475971ea2020e19d0a1afda78f97cb087c679", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55dadafe9cfffd55042cec60993475971ea2020e19d0a1afda78f97cb087c679", kill_on_drop: false }`
[INFO] [stdout] 55dadafe9cfffd55042cec60993475971ea2020e19d0a1afda78f97cb087c679
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b8e9ac5f3128cbe01833b1888d4d8d872a322413ee1f1b8b61b6494d08d18f7c
[INFO] running `Command { std: "docker" "start" "-a" "b8e9ac5f3128cbe01833b1888d4d8d872a322413ee1f1b8b61b6494d08d18f7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.68
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]     Checking tokio v1.32.0
[INFO] [stderr]     Checking arl v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> examples/simple.rs:16:9
[INFO] [stdout]     |
[INFO] [stdout] 16  | /         tokio::spawn(async move {
[INFO] [stdout] 17  | |             // Do things in a loop. Notice there is no `sleep` in here.
[INFO] [stdout] 18  | |             loop {
[INFO] [stdout] 19  | |                 // Wait if needed. First 10 will be executed immediately.
[INFO] [stdout] ...   |
[INFO] [stdout] 25  | |             }
[INFO] [stdout] 26  | |         });
[INFO] [stdout]     | |__________^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `tokio::spawn`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/task/spawn.rs:167:20
[INFO] [stdout]     |
[INFO] [stdout] 164 |     pub fn spawn<T>(future: T) -> JoinHandle<T::Output>
[INFO] [stdout]     |            ----- required by a bound in this function
[INFO] [stdout] ...
[INFO] [stdout] 167 |         T::Output: Send + 'static,
[INFO] [stdout]     |                    ^^^^ required by this bound in `spawn`
[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 E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arl` (example "simple") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b8e9ac5f3128cbe01833b1888d4d8d872a322413ee1f1b8b61b6494d08d18f7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8e9ac5f3128cbe01833b1888d4d8d872a322413ee1f1b8b61b6494d08d18f7c", kill_on_drop: false }`
[INFO] [stdout] b8e9ac5f3128cbe01833b1888d4d8d872a322413ee1f1b8b61b6494d08d18f7c