[INFO] fetching crate flo-task 0.1.0...
[INFO] checking flo-task-0.1.0 against try#8ea250bdb76176ecb0225baa34aa634b024ae0e2 for pr-101692
[INFO] extracting crate flo-task 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate flo-task 0.1.0 on toolchain 8ea250bdb76176ecb0225baa34aa634b024ae0e2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flo-task 0.1.0
[INFO] finished tweaking crates.io crate flo-task 0.1.0
[INFO] tweaked toml for crates.io crate flo-task 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] feaa8b828210679849b120e94d7b4dcee318765372c2d70e93c7f38d0d9674b5
[INFO] running `Command { std: "docker" "start" "-a" "feaa8b828210679849b120e94d7b4dcee318765372c2d70e93c7f38d0d9674b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "feaa8b828210679849b120e94d7b4dcee318765372c2d70e93c7f38d0d9674b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "feaa8b828210679849b120e94d7b4dcee318765372c2d70e93c7f38d0d9674b5", kill_on_drop: false }`
[INFO] [stdout] feaa8b828210679849b120e94d7b4dcee318765372c2d70e93c7f38d0d9674b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+8ea250bdb76176ecb0225baa34aa634b024ae0e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53b5da44e2fcdd82f76b6798d61f573a8c7d9336e9c365e9501ecae46b168c71
[INFO] running `Command { std: "docker" "start" "-a" "53b5da44e2fcdd82f76b6798d61f573a8c7d9336e9c365e9501ecae46b168c71", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stderr]    Compiling futures-channel v0.3.24
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-task v0.3.24
[INFO] [stderr]    Compiling futures-util v0.3.24
[INFO] [stderr]     Checking futures-sink v0.3.24
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.24
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling futures-macro v0.3.24
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking flo-task v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0391]: cycle detected when type-checking `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn`
[INFO] [stdout]   --> src/spawn_scope.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     pub fn spawn<F>(&self, future: F) 
[INFO] [stdout] 24 | |     where F: Future<Output = ()> + Send + 'static
[INFO] [stdout]    | |_________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout] note: ...which requires generator glue MIR for `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 28 | |             tokio::select! {
[INFO] [stdout] 29 | |                 _ = handle.left() => {},
[INFO] [stdout] 30 | |                 _ = future => {},
[INFO] [stdout] 31 | |             }
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires elaborating drops for `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 28 | |             tokio::select! {
[INFO] [stdout] 29 | |                 _ = handle.left() => {},
[INFO] [stdout] 30 | |                 _ = future => {},
[INFO] [stdout] 31 | |             }
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires borrow-checking `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 28 | |             tokio::select! {
[INFO] [stdout] 29 | |                 _ = handle.left() => {},
[INFO] [stdout] 30 | |                 _ = future => {},
[INFO] [stdout] 31 | |             }
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires processing `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 28 | |             tokio::select! {
[INFO] [stdout] 29 | |                 _ = handle.left() => {},
[INFO] [stdout] 30 | |                 _ = future => {},
[INFO] [stdout] 31 | |             }
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires processing MIR for `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 28 | |             tokio::select! {
[INFO] [stdout] 29 | |                 _ = handle.left() => {},
[INFO] [stdout] 30 | |                 _ = future => {},
[INFO] [stdout] 31 | |             }
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires unsafety-checking `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 28 | |             tokio::select! {
[INFO] [stdout] 29 | |                 _ = handle.left() => {},
[INFO] [stdout] 30 | |                 _ = future => {},
[INFO] [stdout] 31 | |             }
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires building MIR for `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 28 | |             tokio::select! {
[INFO] [stdout] 29 | |                 _ = handle.left() => {},
[INFO] [stdout] 30 | |                 _ = future => {},
[INFO] [stdout] 31 | |             }
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires type-checking `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:27:33
[INFO] [stdout]    |
[INFO] [stdout] 27 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 28 | |             tokio::select! {
[INFO] [stdout] 29 | |                 _ = handle.left() => {},
[INFO] [stdout] 30 | |                 _ = future => {},
[INFO] [stdout] 31 | |             }
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout]    = note: ...which again requires type-checking `spawn_scope::<impl at src/spawn_scope.rs:12:1: 12:16>::spawn`, completing the cycle
[INFO] [stdout]    = note: cycle used when type-checking all item bodies
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0391]: cycle detected when type-checking `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn`
[INFO] [stdout]   --> src/spawn_scope.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 | /     pub fn spawn<F>(&self, future: F) 
[INFO] [stdout] 57 | |     where F: Future<Output = ()> + Send + 'static
[INFO] [stdout]    | |_________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout] note: ...which requires generator glue MIR for `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:60:33
[INFO] [stdout]    |
[INFO] [stdout] 60 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 61 | |             tokio::select! {
[INFO] [stdout] 62 | |                 _ = handle.left() => {},
[INFO] [stdout] 63 | |                 _ = future => {},
[INFO] [stdout] 64 | |             }
[INFO] [stdout] 65 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires elaborating drops for `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:60:33
[INFO] [stdout]    |
[INFO] [stdout] 60 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 61 | |             tokio::select! {
[INFO] [stdout] 62 | |                 _ = handle.left() => {},
[INFO] [stdout] 63 | |                 _ = future => {},
[INFO] [stdout] 64 | |             }
[INFO] [stdout] 65 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires borrow-checking `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:60:33
[INFO] [stdout]    |
[INFO] [stdout] 60 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 61 | |             tokio::select! {
[INFO] [stdout] 62 | |                 _ = handle.left() => {},
[INFO] [stdout] 63 | |                 _ = future => {},
[INFO] [stdout] 64 | |             }
[INFO] [stdout] 65 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires processing `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:60:33
[INFO] [stdout]    |
[INFO] [stdout] 60 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 61 | |             tokio::select! {
[INFO] [stdout] 62 | |                 _ = handle.left() => {},
[INFO] [stdout] 63 | |                 _ = future => {},
[INFO] [stdout] 64 | |             }
[INFO] [stdout] 65 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires processing MIR for `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:60:33
[INFO] [stdout]    |
[INFO] [stdout] 60 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 61 | |             tokio::select! {
[INFO] [stdout] 62 | |                 _ = handle.left() => {},
[INFO] [stdout] 63 | |                 _ = future => {},
[INFO] [stdout] 64 | |             }
[INFO] [stdout] 65 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires unsafety-checking `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:60:33
[INFO] [stdout]    |
[INFO] [stdout] 60 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 61 | |             tokio::select! {
[INFO] [stdout] 62 | |                 _ = handle.left() => {},
[INFO] [stdout] 63 | |                 _ = future => {},
[INFO] [stdout] 64 | |             }
[INFO] [stdout] 65 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires building MIR for `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:60:33
[INFO] [stdout]    |
[INFO] [stdout] 60 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 61 | |             tokio::select! {
[INFO] [stdout] 62 | |                 _ = handle.left() => {},
[INFO] [stdout] 63 | |                 _ = future => {},
[INFO] [stdout] 64 | |             }
[INFO] [stdout] 65 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout] note: ...which requires type-checking `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn::{closure#0}`...
[INFO] [stdout]   --> src/spawn_scope.rs:60:33
[INFO] [stdout]    |
[INFO] [stdout] 60 |           tokio::spawn(async move {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 61 | |             tokio::select! {
[INFO] [stdout] 62 | |                 _ = handle.left() => {},
[INFO] [stdout] 63 | |                 _ = future => {},
[INFO] [stdout] 64 | |             }
[INFO] [stdout] 65 | |         });
[INFO] [stdout]    | |_________^
[INFO] [stdout]    = note: ...which again requires type-checking `spawn_scope::<impl at src/spawn_scope.rs:50:1: 50:22>::spawn`, completing the cycle
[INFO] [stdout]    = note: cycle used when type-checking all item bodies
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0391`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flo-task` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "53b5da44e2fcdd82f76b6798d61f573a8c7d9336e9c365e9501ecae46b168c71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53b5da44e2fcdd82f76b6798d61f573a8c7d9336e9c365e9501ecae46b168c71", kill_on_drop: false }`
[INFO] [stdout] 53b5da44e2fcdd82f76b6798d61f573a8c7d9336e9c365e9501ecae46b168c71