[INFO] fetching crate futures-channel-preview 0.3.0-alpha.19...
[INFO] testing futures-channel-preview-0.3.0-alpha.19 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate futures-channel-preview 0.3.0-alpha.19 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate futures-channel-preview 0.3.0-alpha.19
[INFO] finished tweaking crates.io crate futures-channel-preview 0.3.0-alpha.19
[INFO] tweaked toml for crates.io crate futures-channel-preview 0.3.0-alpha.19 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate futures-channel-preview 0.3.0-alpha.19 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.19
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c55cc1b5bc81f2bb09ba40594414d978220abc154df6571ce4e2e3eb26dcbda
[INFO] running `Command { std: "docker" "start" "-a" "5c55cc1b5bc81f2bb09ba40594414d978220abc154df6571ce4e2e3eb26dcbda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c55cc1b5bc81f2bb09ba40594414d978220abc154df6571ce4e2e3eb26dcbda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c55cc1b5bc81f2bb09ba40594414d978220abc154df6571ce4e2e3eb26dcbda", kill_on_drop: false }`
[INFO] [stdout] 5c55cc1b5bc81f2bb09ba40594414d978220abc154df6571ce4e2e3eb26dcbda
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b64158dec2f870ea5afe561b9aeaa49d01833418bb7aff13b7b0b77060987bf
[INFO] running `Command { std: "docker" "start" "-a" "6b64158dec2f870ea5afe561b9aeaa49d01833418bb7aff13b7b0b77060987bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/mpsc/mod.rs:771:49
[INFO] [stdout]     |
[INFO] [stdout] 771 |             let actual = self.inner.num_senders.compare_and_swap(curr, next, SeqCst);
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `AssertKinds` is never used
[INFO] [stdout]    --> src/mpsc/mod.rs:126:7
[INFO] [stdout]     |
[INFO] [stdout] 126 | trait AssertKinds: Send + Sync + Clone {}
[INFO] [stdout]     |       ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "6b64158dec2f870ea5afe561b9aeaa49d01833418bb7aff13b7b0b77060987bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b64158dec2f870ea5afe561b9aeaa49d01833418bb7aff13b7b0b77060987bf", kill_on_drop: false }`
[INFO] [stdout] 6b64158dec2f870ea5afe561b9aeaa49d01833418bb7aff13b7b0b77060987bf
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9832818ccbe580c0be628e1b6697fa04b4c582e42c7f5f08e554744295cc2d2b
[INFO] running `Command { std: "docker" "start" "-a" "9832818ccbe580c0be628e1b6697fa04b4c582e42c7f5f08e554744295cc2d2b", kill_on_drop: false }`
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/mpsc/mod.rs:771:49
[INFO] [stdout]     |
[INFO] [stdout] 771 |             let actual = self.inner.num_senders.compare_and_swap(curr, next, SeqCst);
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `AssertKinds` is never used
[INFO] [stdout]    --> src/mpsc/mod.rs:126:7
[INFO] [stdout]     |
[INFO] [stdout] 126 | trait AssertKinds: Send + Sync + Clone {}
[INFO] [stdout]     |       ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::channel::{mpsc, oneshot};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::executor::{block_on, block_on_stream};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::future::{FutureExt, poll_fn};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::stream::{Stream, StreamExt};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures::sink::{Sink, SinkExt};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use futures::task::{Context, Poll};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures_test`
[INFO] [stdout]  --> tests/mpsc.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use futures_test::task::{new_count_waker, noop_context};
[INFO] [stdout]   |     ^^^^^^^^^^^^ use of unresolved module or unlinked crate `futures_test`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 8 - use futures_test::task::{new_count_waker, noop_context};
[INFO] [stdout] 8 + use futures_core::task::{new_count_waker, noop_context};
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `futures`
[INFO] [stdout]  --> tests/mpsc.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use futures::pin_mut;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-channel-preview` (test "mpsc") due to 8 previous errors
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/channel.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::channel::mpsc;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/channel.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::executor::block_on;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/channel.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::future::poll_fn;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/channel.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::stream::StreamExt;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/channel.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures::sink::SinkExt;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc-close.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::channel::mpsc;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc-close.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::executor::block_on;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc-close.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::sink::SinkExt;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/mpsc-close.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::stream::StreamExt;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/channel.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         sender.send(n - x).await.unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/channel.rs:17:33
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let list: Vec<_> = block_on(rx.collect());
[INFO] [stdout]    |                                 ^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/channel.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         rx.poll_next_unpin(cx)
[INFO] [stdout]    |         ^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/channel.rs:46:14
[INFO] [stdout]    |
[INFO] [stdout] 46 |     block_on(tx.send(1)).unwrap();
[INFO] [stdout]    |              ^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/channel.rs:64:14
[INFO] [stdout]    |
[INFO] [stdout] 64 |     block_on(tx.send(A)).unwrap();
[INFO] [stdout]    |              ^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   --> tests/mpsc-close.rs:16:49
[INFO] [stdout]    |
[INFO] [stdout] 16 |     drop(block_on(receiver.take(3).for_each(|_| futures::future::ready(()))));
[INFO] [stdout]    |                                                 ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout]  1 + use std::future;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `future`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 16 -     drop(block_on(receiver.take(3).for_each(|_| futures::future::ready(()))));
[INFO] [stdout] 16 +     drop(block_on(receiver.take(3).for_each(|_| future::ready(()))));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/oneshot.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::channel::oneshot::{self, Sender};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/oneshot.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::executor::block_on;
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/oneshot.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::future::{Future, FutureExt, poll_fn};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures`
[INFO] [stdout]  --> tests/oneshot.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::task::{Context, Poll};
[INFO] [stdout]   |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `futures_test`
[INFO] [stdout]  --> tests/oneshot.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures_test::task::panic_waker_ref;
[INFO] [stdout]   |     ^^^^^^^^^^^^ use of unresolved module or unlinked crate `futures_test`
[INFO] [stdout]   |
[INFO] [stdout] help: there is a crate or module with a similar name
[INFO] [stdout]   |
[INFO] [stdout] 5 - use futures_test::task::panic_waker_ref;
[INFO] [stdout] 5 + use futures_core::task::panic_waker_ref;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:12:37
[INFO] [stdout]    |
[INFO] [stdout] 12 |         while let Ok(()) = block_on(sender.send(42)) {}
[INFO] [stdout]    |                                     ^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-channel-preview` (test "channel") due to 10 previous errors
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 16 |     drop(block_on(receiver.take(3).for_each(|_| futures::future::ready(()))));
[INFO] [stdout]    |                   ^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:25:40
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let (tx2, mut tx3, mut tx4) = (tx1.clone(), tx1.clone(), tx1.clone());
[INFO] [stdout]    |                                        ^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:31:18
[INFO] [stdout]    |
[INFO] [stdout] 31 |         block_on(tx3.close()).unwrap();
[INFO] [stdout]    |                  ^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:35:18
[INFO] [stdout]    |
[INFO] [stdout] 35 |         assert!(!tx4.is_closed());
[INFO] [stdout]    |                  ^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:38:29
[INFO] [stdout]    |
[INFO] [stdout] 38 |         assert_eq!(block_on(rx.next()), Some(5));
[INFO] [stdout]    |                             ^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:47:40
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let (tx2, mut tx3, mut tx4) = (tx1.clone(), tx1.clone(), tx1.clone());
[INFO] [stdout]    |                                        ^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:53:18
[INFO] [stdout]    |
[INFO] [stdout] 53 |         block_on(tx3.close()).unwrap();
[INFO] [stdout]    |                  ^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:57:18
[INFO] [stdout]    |
[INFO] [stdout] 57 |         assert!(!tx4.is_closed());
[INFO] [stdout]    |                  ^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:60:29
[INFO] [stdout]    |
[INFO] [stdout] 60 |         assert_eq!(block_on(rx.next()), Some(5));
[INFO] [stdout]    |                             ^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:72:23
[INFO] [stdout]    |
[INFO] [stdout] 72 |         let mut tx2 = tx1.clone();
[INFO] [stdout]    |                       ^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:83:29
[INFO] [stdout]    |
[INFO] [stdout] 83 |         assert_eq!(block_on(rx.next()), None);
[INFO] [stdout]    |                             ^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:88:23
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut tx2 = tx1.clone();
[INFO] [stdout]    |                       ^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/mpsc-close.rs:99:29
[INFO] [stdout]    |
[INFO] [stdout] 99 |         assert_eq!(block_on(rx.next()), None);
[INFO] [stdout]    |                             ^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-channel-preview` (test "oneshot") due to 5 previous errors
[INFO] [stderr] error: could not compile `futures-channel-preview` (test "mpsc-close") due to 19 previous errors
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/mpsc/mod.rs:771:49
[INFO] [stdout]     |
[INFO] [stdout] 771 |             let actual = self.inner.num_senders.compare_and_swap(curr, next, SeqCst);
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `AssertKinds` is never used
[INFO] [stdout]    --> src/mpsc/mod.rs:126:7
[INFO] [stdout]     |
[INFO] [stdout] 126 | trait AssertKinds: Send + Sync + Clone {}
[INFO] [stdout]     |       ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9832818ccbe580c0be628e1b6697fa04b4c582e42c7f5f08e554744295cc2d2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9832818ccbe580c0be628e1b6697fa04b4c582e42c7f5f08e554744295cc2d2b", kill_on_drop: false }`
[INFO] [stdout] 9832818ccbe580c0be628e1b6697fa04b4c582e42c7f5f08e554744295cc2d2b