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[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Frando/hypercore-protocol-rust-experiments on toolchain 9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c
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[INFO] started tweaking git repo https://github.com/Frando/hypercore-protocol-rust-experiments
[INFO] finished tweaking git repo https://github.com/Frando/hypercore-protocol-rust-experiments
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[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling hypercore-protocol v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `TryFutureExt`
[INFO] [stdout]  --> benches/throughput.rs:4:42
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::future::{Either, FutureExt, TryFutureExt};
[INFO] [stdout]   |                                          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `unwrap` found for opaque type `impl futures::Future` in the current scope
[INFO] [stdout]   --> examples/hypercore.rs:38:67
[INFO] [stdout]    |
[INFO] [stdout] 38 |             let feed = Feed::builder(public_key, storage).build().unwrap();
[INFO] [stdout]    |                                                                   ^^^^^^ method not found in `impl futures::Future`
[INFO] [stdout]    |
[INFO] [stdout] help: consider `await`ing on the `Future` and calling the method on its `Output`
[INFO] [stdout]    |
[INFO] [stdout] 38 |             let feed = Feed::builder(public_key, storage).build().await.unwrap();
[INFO] [stdout]    |                                                                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FutureExt`
[INFO] [stdout]  --> benches/throughput.rs:4:31
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::future::{Either, FutureExt, TryFutureExt};
[INFO] [stdout]   |                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hypercore-protocol`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2005030e1d2e4f4e30b0e3f4c431dddbf37fe37bd34012d99381daea53f3f07f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2005030e1d2e4f4e30b0e3f4c431dddbf37fe37bd34012d99381daea53f3f07f", kill_on_drop: false }`
[INFO] [stdout] 2005030e1d2e4f4e30b0e3f4c431dddbf37fe37bd34012d99381daea53f3f07f