[INFO] fetching crate toy-async-runtime 0.1.0-alpha.1...
[INFO] checking toy-async-runtime-0.1.0-alpha.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate toy-async-runtime 0.1.0-alpha.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate toy-async-runtime 0.1.0-alpha.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 toy-async-runtime 0.1.0-alpha.1
[INFO] finished tweaking crates.io crate toy-async-runtime 0.1.0-alpha.1
[INFO] tweaked toml for crates.io crate toy-async-runtime 0.1.0-alpha.1 written to /workspace/builds/worker-4-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] 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] 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] adbf19348aa12d12b27daf42bafde22970f9e255cb980a8228858bf02dd251a6
[INFO] running `Command { std: "docker" "start" "-a" "adbf19348aa12d12b27daf42bafde22970f9e255cb980a8228858bf02dd251a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "adbf19348aa12d12b27daf42bafde22970f9e255cb980a8228858bf02dd251a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adbf19348aa12d12b27daf42bafde22970f9e255cb980a8228858bf02dd251a6", kill_on_drop: false }`
[INFO] [stdout] adbf19348aa12d12b27daf42bafde22970f9e255cb980a8228858bf02dd251a6
[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] 980ccf2ef2760b3252ffccb34cd6aaaa01616de9691a91b076e1a16f7f9db08e
[INFO] running `Command { std: "docker" "start" "-a" "980ccf2ef2760b3252ffccb34cd6aaaa01616de9691a91b076e1a16f7f9db08e", kill_on_drop: false }`
[INFO] [stderr]     Checking toy-async-runtime v0.1.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "980ccf2ef2760b3252ffccb34cd6aaaa01616de9691a91b076e1a16f7f9db08e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "980ccf2ef2760b3252ffccb34cd6aaaa01616de9691a91b076e1a16f7f9db08e", kill_on_drop: false }`
[INFO] [stdout] 980ccf2ef2760b3252ffccb34cd6aaaa01616de9691a91b076e1a16f7f9db08e
[INFO] checking toy-async-runtime-0.1.0-alpha.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate toy-async-runtime 0.1.0-alpha.1 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate toy-async-runtime 0.1.0-alpha.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 toy-async-runtime 0.1.0-alpha.1
[INFO] finished tweaking crates.io crate toy-async-runtime 0.1.0-alpha.1
[INFO] tweaked toml for crates.io crate toy-async-runtime 0.1.0-alpha.1 written to /workspace/builds/worker-4-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] 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] aed84283a984e0cedf49664b6631cb5dd9933882d032d5ed150c83c1c4c75d14
[INFO] running `Command { std: "docker" "start" "-a" "aed84283a984e0cedf49664b6631cb5dd9933882d032d5ed150c83c1c4c75d14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aed84283a984e0cedf49664b6631cb5dd9933882d032d5ed150c83c1c4c75d14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aed84283a984e0cedf49664b6631cb5dd9933882d032d5ed150c83c1c4c75d14", kill_on_drop: false }`
[INFO] [stdout] aed84283a984e0cedf49664b6631cb5dd9933882d032d5ed150c83c1c4c75d14
[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] d96b2f001d3e42cb7a9d95d1f16b39e2669eadaa403dcdbb54247b4e124ef31b
[INFO] running `Command { std: "docker" "start" "-a" "d96b2f001d3e42cb7a9d95d1f16b39e2669eadaa403dcdbb54247b4e124ef31b", kill_on_drop: false }`
[INFO] [stderr]     Checking toy-async-runtime v0.1.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/runitime.rs:28:28
[INFO] [stdout]    |
[INFO] [stdout] 28 |         std::thread::spawn(|| loop {
[INFO] [stdout]    |                            ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `std::thread::spawn`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 28 ~         std::thread::spawn(|| -> /* Type */ { loop {
[INFO] [stdout] 29 |             let task = match Runtime::get().pop_front() {
[INFO] [stdout]  ...
[INFO] [stdout] 40 |             }
[INFO] [stdout] 41 ~         } });
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]   --> src/runitime.rs:28:28
[INFO] [stdout]    |
[INFO] [stdout] 28 |         std::thread::spawn(|| loop {
[INFO] [stdout]    |                            ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `std::thread::spawn`
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 28 ~         std::thread::spawn(|| -> /* Type */ { loop {
[INFO] [stdout] 29 |             let task = match Runtime::get().pop_front() {
[INFO] [stdout]  ...
[INFO] [stdout] 40 |             }
[INFO] [stdout] 41 ~         } });
[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 E0283`.
[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 `toy-async-runtime` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `toy-async-runtime` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d96b2f001d3e42cb7a9d95d1f16b39e2669eadaa403dcdbb54247b4e124ef31b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d96b2f001d3e42cb7a9d95d1f16b39e2669eadaa403dcdbb54247b4e124ef31b", kill_on_drop: false }`
[INFO] [stdout] d96b2f001d3e42cb7a9d95d1f16b39e2669eadaa403dcdbb54247b4e124ef31b