[INFO] cloning repository https://github.com/Altanis/tokio-bichannel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Altanis/tokio-bichannel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAltanis%2Ftokio-bichannel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAltanis%2Ftokio-bichannel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c700e86e4234271ee02cf231534955b796b24f24
[INFO] testing Altanis/tokio-bichannel against try#bd7d74411512a3dd3b35d2f699c51dd2557c7e7e+cargoflags=-Zbuild-dir-new-layout for pr-149852-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAltanis%2Ftokio-bichannel" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Altanis/tokio-bichannel
[INFO] finished tweaking git repo https://github.com/Altanis/tokio-bichannel
[INFO] tweaked toml for git repo https://github.com/Altanis/tokio-bichannel written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Altanis/tokio-bichannel on toolchain bd7d74411512a3dd3b35d2f699c51dd2557c7e7e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Altanis/tokio-bichannel 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" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70c34a789ec57f05cb94c890b0d1ce7b09f58e3734959b7d5abfb127f5eb81d1
[INFO] running `Command { std: "docker" "start" "-a" "70c34a789ec57f05cb94c890b0d1ce7b09f58e3734959b7d5abfb127f5eb81d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70c34a789ec57f05cb94c890b0d1ce7b09f58e3734959b7d5abfb127f5eb81d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70c34a789ec57f05cb94c890b0d1ce7b09f58e3734959b7d5abfb127f5eb81d1", kill_on_drop: false }`
[INFO] [stdout] 70c34a789ec57f05cb94c890b0d1ce7b09f58e3734959b7d5abfb127f5eb81d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "build" "--frozen" "--message-format=json" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] d5533689a5c1eae0d7bb02b30cd3ad08a5547409792be6e168801a1185d5c87c
[INFO] running `Command { std: "docker" "start" "-a" "d5533689a5c1eae0d7bb02b30cd3ad08a5547409792be6e168801a1185d5c87c", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v1.39.2
[INFO] [stderr]    Compiling tokio-bichannel v1.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.70s
[INFO] running `Command { std: "docker" "inspect" "d5533689a5c1eae0d7bb02b30cd3ad08a5547409792be6e168801a1185d5c87c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5533689a5c1eae0d7bb02b30cd3ad08a5547409792be6e168801a1185d5c87c", kill_on_drop: false }`
[INFO] [stdout] d5533689a5c1eae0d7bb02b30cd3ad08a5547409792be6e168801a1185d5c87c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "test" "--frozen" "--no-run" "--message-format=json" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] 2eeda52426c69fe08d715291d571b608386315d42ba9bcfffc198b3ffe7dc5a3
[INFO] running `Command { std: "docker" "start" "-a" "2eeda52426c69fe08d715291d571b608386315d42ba9bcfffc198b3ffe7dc5a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling syn v2.0.72
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling tokio v1.39.2
[INFO] [stderr]    Compiling tokio-bichannel v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:167:14
[INFO] [stdout]     |
[INFO] [stdout] 167 |         let (mut chan1, mut chan2) = channel::<String, String>(10);
[INFO] [stdout]     |              ----^^^^^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 14.48s
[INFO] running `Command { std: "docker" "inspect" "2eeda52426c69fe08d715291d571b608386315d42ba9bcfffc198b3ffe7dc5a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eeda52426c69fe08d715291d571b608386315d42ba9bcfffc198b3ffe7dc5a3", kill_on_drop: false }`
[INFO] [stdout] 2eeda52426c69fe08d715291d571b608386315d42ba9bcfffc198b3ffe7dc5a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "test" "--frozen" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] 646c19c72685ee9e5693626305bc09d52f76b5671124db527bfbb5548c037c62
[INFO] running `Command { std: "docker" "start" "-a" "646c19c72685ee9e5693626305bc09d52f76b5671124db527bfbb5548c037c62", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:167:14
[INFO] [stderr]     |
[INFO] [stderr] 167 |         let (mut chan1, mut chan2) = channel::<String, String>(10);
[INFO] [stderr]     |              ----^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio-bichannel` (lib test) generated 1 warning (run `cargo fix --lib -p tokio-bichannel --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/build/tokio-bichannel/a824aeb2a1a2f836/deps/tokio_bichannel-a824aeb2a1a2f836)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_try_recv ... ok
[INFO] [stdout] test tests::test_send_recv ... ok
[INFO] [stdout] test tests::test_threading ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tokio_bichannel
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - Channel<S,R>::try_send (line 72) ... FAILED
[INFO] [stdout] test src/lib.rs - Channel (line 8) ... FAILED
[INFO] [stdout] test src/lib.rs - Channel<S,R>::try_recv (line 89) ... FAILED
[INFO] [stdout] test src/lib.rs - Channel<S,R>::send (line 36) ... FAILED
[INFO] [stdout] test src/lib.rs - Channel<S,R>::recv (line 51) ... FAILED
[INFO] [stdout] test src/lib.rs - channel (line 112) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Channel<S,R>::try_send (line 72) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `channel` in this scope
[INFO] [stdout]   --> src/lib.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 73 | match channel.try_send("Hello".to_string()) {
[INFO] [stdout]    |       ^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these functions
[INFO] [stdout]    |
[INFO] [stdout] 72 + use std::sync::mpmc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 72 + use std::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 72 + use std::sync::oneshot::channel;
[INFO] [stdout]    |
[INFO] [stdout] 72 + use tokio::sync::broadcast::channel;
[INFO] [stdout]    |
[INFO] [stdout]    = and 4 other candidates
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Channel (line 8) stdout ----
[INFO] [stdout] error[E0425]: cannot find function `channel` in this scope
[INFO] [stdout]  --> src/lib.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | let (mut l, mut r) = channel::<String, String>(10);
[INFO] [stdout]   |                      ^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these functions
[INFO] [stdout]   |
[INFO] [stdout] 8 + use std::sync::mpmc::channel;
[INFO] [stdout]   |
[INFO] [stdout] 8 + use std::sync::mpsc::channel;
[INFO] [stdout]   |
[INFO] [stdout] 8 + use std::sync::oneshot::channel;
[INFO] [stdout]   |
[INFO] [stdout] 8 + use tokio::sync::broadcast::channel;
[INFO] [stdout]   |
[INFO] [stdout]   = and 4 other candidates
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:11:40
[INFO] [stdout]    |
[INFO] [stdout]  8 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_8_0() {
[INFO] [stdout]    |                                      --------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 11 | l.send("Hello from chan1".to_string()).await.unwrap();
[INFO] [stdout]    |                                        ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:12:40
[INFO] [stdout]    |
[INFO] [stdout]  8 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_8_0() {
[INFO] [stdout]    |                                      --------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 12 | r.send("Hello from chan2".to_string()).await.unwrap();
[INFO] [stdout]    |                                        ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout]  8 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_8_0() {
[INFO] [stdout]    |                                      --------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 14 | assert_eq!(r.recv().await.unwrap(), "Hello from chan1");
[INFO] [stdout]    |                     ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:15:21
[INFO] [stdout]    |
[INFO] [stdout]  8 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_8_0() {
[INFO] [stdout]    |                                      --------------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 15 | assert_eq!(l.recv().await.unwrap(), "Hello from chan2");
[INFO] [stdout]    |                     ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | l.send("Hello from chan1".to_string()).await.unwrap();
[INFO] [stdout]    | ^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | r.send("Hello from chan2".to_string()).await.unwrap();
[INFO] [stdout]    | ^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0425, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Channel<S,R>::try_recv (line 89) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `channel` in this scope
[INFO] [stdout]   --> src/lib.rs:90:7
[INFO] [stdout]    |
[INFO] [stdout] 90 | match channel.try_recv() {
[INFO] [stdout]    |       ^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these functions
[INFO] [stdout]    |
[INFO] [stdout] 89 + use std::sync::mpmc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 89 + use std::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 89 + use std::sync::oneshot::channel;
[INFO] [stdout]    |
[INFO] [stdout] 89 + use tokio::sync::broadcast::channel;
[INFO] [stdout]    |
[INFO] [stdout]    = and 4 other candidates
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Channel<S,R>::send (line 36) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `channel` in this scope
[INFO] [stdout]   --> src/lib.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | channel.send("Hello".to_string()).await.unwrap();
[INFO] [stdout]    | ^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these functions
[INFO] [stdout]    |
[INFO] [stdout] 36 + use std::sync::mpmc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 36 + use std::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 36 + use std::sync::oneshot::channel;
[INFO] [stdout]    |
[INFO] [stdout] 36 + use tokio::sync::broadcast::channel;
[INFO] [stdout]    |
[INFO] [stdout]    = and 4 other candidates
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:37:35
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_36_0() {
[INFO] [stdout]    |                                      ---------------------------------- this is not `async`
[INFO] [stdout] 37 | channel.send("Hello".to_string()).await.unwrap();
[INFO] [stdout]    |                                   ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Channel<S,R>::recv (line 51) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `channel` in this scope
[INFO] [stdout]   --> src/lib.rs:52:23
[INFO] [stdout]    |
[INFO] [stdout] 52 | while let Some(msg) = channel.recv().await {
[INFO] [stdout]    |                       ^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these functions
[INFO] [stdout]    |
[INFO] [stdout] 51 + use std::sync::mpmc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 51 + use std::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 51 + use std::sync::oneshot::channel;
[INFO] [stdout]    |
[INFO] [stdout] 51 + use tokio::sync::broadcast::channel;
[INFO] [stdout]    |
[INFO] [stdout]    = and 4 other candidates
[INFO] [stdout] 
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]   --> src/lib.rs:52:38
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_51_0() {
[INFO] [stdout]    |                                      ---------------------------------- this is not `async`
[INFO] [stdout] 52 | while let Some(msg) = channel.recv().await {
[INFO] [stdout]    |                                      ^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Channel (line 8)
[INFO] [stdout]     src/lib.rs - Channel<S,R>::recv (line 51)
[INFO] [stdout]     src/lib.rs - Channel<S,R>::send (line 36)
[INFO] [stdout]     src/lib.rs - Channel<S,R>::try_recv (line 89)
[INFO] [stdout]     src/lib.rs - Channel<S,R>::try_send (line 72)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 5 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.72s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "646c19c72685ee9e5693626305bc09d52f76b5671124db527bfbb5548c037c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "646c19c72685ee9e5693626305bc09d52f76b5671124db527bfbb5548c037c62", kill_on_drop: false }`
[INFO] [stdout] 646c19c72685ee9e5693626305bc09d52f76b5671124db527bfbb5548c037c62
