[INFO] fetching crate async-thread 0.1.2... [INFO] testing async-thread-0.1.2 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7 [INFO] extracting crate async-thread 0.1.2 into /workspace/builds/worker-5-tc1/source [INFO] started tweaking crates.io crate async-thread 0.1.2 [INFO] finished tweaking crates.io crate async-thread 0.1.2 [INFO] tweaked toml for crates.io crate async-thread 0.1.2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate async-thread 0.1.2 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 57 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 2d235a03ea4f335175a9563b1253c3f423339763ff91ecb8a66933f5f3621a7d [INFO] running `Command { std: "docker" "start" "-a" "2d235a03ea4f335175a9563b1253c3f423339763ff91ecb8a66933f5f3621a7d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2d235a03ea4f335175a9563b1253c3f423339763ff91ecb8a66933f5f3621a7d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2d235a03ea4f335175a9563b1253c3f423339763ff91ecb8a66933f5f3621a7d", kill_on_drop: false }` [INFO] [stdout] 2d235a03ea4f335175a9563b1253c3f423339763ff91ecb8a66933f5f3621a7d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] d8e3023d3a5ca485c183b8dd4953590ba052d45dbb938a3d59d59b62418bc826 [INFO] running `Command { std: "docker" "start" "-a" "d8e3023d3a5ca485c183b8dd4953590ba052d45dbb938a3d59d59b62418bc826", kill_on_drop: false }` [INFO] [stderr] Compiling async-thread v0.1.2 (/opt/rustwide/workdir) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s [INFO] running `Command { std: "docker" "inspect" "d8e3023d3a5ca485c183b8dd4953590ba052d45dbb938a3d59d59b62418bc826", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d8e3023d3a5ca485c183b8dd4953590ba052d45dbb938a3d59d59b62418bc826", kill_on_drop: false }` [INFO] [stdout] d8e3023d3a5ca485c183b8dd4953590ba052d45dbb938a3d59d59b62418bc826 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 30e7da115654c0dcee40a0098cc87fe564564080a2468299b1c431e3c033745d [INFO] running `Command { std: "docker" "start" "-a" "30e7da115654c0dcee40a0098cc87fe564564080a2468299b1c431e3c033745d", kill_on_drop: false }` [INFO] [stderr] Compiling concurrent-queue v2.5.0 [INFO] [stderr] Compiling parking v2.2.1 [INFO] [stderr] Compiling fastrand v2.3.0 [INFO] [stderr] Compiling futures-io v0.3.31 [INFO] [stderr] Compiling rustix v1.1.2 [INFO] [stderr] Compiling linux-raw-sys v0.11.0 [INFO] [stderr] Compiling async-io v2.6.0 [INFO] [stderr] Compiling async-task v4.7.1 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling futures-lite v2.6.1 [INFO] [stderr] Compiling piper v0.2.4 [INFO] [stderr] Compiling value-bag v1.11.1 [INFO] [stderr] Compiling event-listener v5.4.1 [INFO] [stderr] Compiling async-channel v1.9.0 [INFO] [stderr] Compiling event-listener-strategy v0.5.4 [INFO] [stderr] Compiling async-channel v2.5.0 [INFO] [stderr] Compiling async-lock v3.4.1 [INFO] [stderr] Compiling async-executor v1.13.3 [INFO] [stderr] Compiling log v0.4.28 [INFO] [stderr] Compiling blocking v1.6.2 [INFO] [stderr] Compiling kv-log-macro v1.0.7 [INFO] [stderr] Compiling async-attributes v1.1.2 [INFO] [stderr] Compiling polling v3.11.0 [INFO] [stderr] Compiling async-global-executor v2.4.1 [INFO] [stderr] Compiling async-std v1.13.2 [INFO] [stderr] Compiling async-thread v0.1.2 (/opt/rustwide/workdir) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 16.59s [INFO] running `Command { std: "docker" "inspect" "30e7da115654c0dcee40a0098cc87fe564564080a2468299b1c431e3c033745d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "30e7da115654c0dcee40a0098cc87fe564564080a2468299b1c431e3c033745d", kill_on_drop: false }` [INFO] [stdout] 30e7da115654c0dcee40a0098cc87fe564564080a2468299b1c431e3c033745d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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", kill_on_drop: false }` [INFO] [stdout] e2189101bd3d6356a91dfc75121b5de381d6d9911991911a6a73980fb45ac45c [INFO] running `Command { std: "docker" "start" "-a" "e2189101bd3d6356a91dfc75121b5de381d6d9911991911a6a73980fb45ac45c", kill_on_drop: false }` [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/async_thread-2c4230f75448ce2f) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test tests::it_works ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s [INFO] [stdout] [INFO] [stderr] Doc-tests async_thread [INFO] [stdout] [INFO] [stdout] running 14 tests [INFO] [stdout] test src/lib.rs - (line 3) ... FAILED [INFO] [stdout] test src/lib.rs - Builder::spawn (line 256) ... FAILED [INFO] [stdout] test src/lib.rs - Builder::new (line 172) ... FAILED [INFO] [stdout] test src/lib.rs - Builder::stack_size (line 225) ... ok [INFO] [stdout] test src/lib.rs - Builder::name (line 199) ... FAILED [INFO] [stdout] test src/lib.rs - spawn (line 326) ... FAILED [INFO] [stdout] test src/lib.rs - spawn (line 340) ... FAILED [INFO] [stdout] test src/lib.rs - Builder (line 150) ... ok [INFO] [stdout] test src/lib.rs - JoinHandle (line 30) ... ok [INFO] [stdout] test src/lib.rs - JoinHandle::join (line 92) ... FAILED [INFO] [stdout] test src/lib.rs - spawn (line 362) ... FAILED [INFO] [stdout] test src/lib.rs - JoinHandle (line 48) - compile ... FAILED [INFO] [stdout] test src/lib.rs - JoinHandle::thread (line 113) ... ok [INFO] [stdout] test src/lib.rs - JoinHandle (line 38) ... ok [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/lib.rs - (line 3) stdout ---- [INFO] [stdout] error[E0425]: cannot find function `spawn` in the crate root [INFO] [stdout] --> src/lib.rs:4:21 [INFO] [stdout] | [INFO] [stdout] 4 | let handle = crate::spawn(|| 5usize); [INFO] [stdout] | ^^^^^ not found in the crate root [INFO] [stdout] | [INFO] [stdout] help: consider importing one of these functions [INFO] [stdout] | [INFO] [stdout] 3 + use std::thread::spawn; [INFO] [stdout] | [INFO] [stdout] 3 + use async_std::task::spawn; [INFO] [stdout] | [INFO] [stdout] 3 + use async_thread::spawn; [INFO] [stdout] | [INFO] [stdout] help: if you import `spawn`, refer to it directly [INFO] [stdout] | [INFO] [stdout] 4 - let handle = crate::spawn(|| 5usize); [INFO] [stdout] 4 + let handle = spawn(|| 5usize); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:5:26 [INFO] [stdout] | [INFO] [stdout] 3 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_3_0() { [INFO] [stdout] | --------------------------------- this is not `async` [INFO] [stdout] 4 | let handle = crate::spawn(|| 5usize); [INFO] [stdout] 5 | assert_eq!(handle.join().await.map_err(drop), Ok(5)); [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 - Builder::spawn (line 256) stdout ---- [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:264:16 [INFO] [stdout] | [INFO] [stdout] 257 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_256_0() { [INFO] [stdout] | ----------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 264 | handler.join().await.unwrap(); [INFO] [stdout] | ^^^^^ only allowed inside `async` functions and blocks [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0728`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - Builder::new (line 172) stdout ---- [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:182:16 [INFO] [stdout] | [INFO] [stdout] 173 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_172_0() { [INFO] [stdout] | ----------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 182 | handler.join().await.unwrap(); [INFO] [stdout] | ^^^^^ only allowed inside `async` functions and blocks [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0728`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - Builder::name (line 199) stdout ---- [INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread` [INFO] [stdout] --> src/lib.rs:205:16 [INFO] [stdout] | [INFO] [stdout] 205 | assert_eq!(thread::current().name(), Some("foo")) [INFO] [stdout] | ^^^^^^ use of unresolved module or unlinked crate `thread` [INFO] [stdout] | [INFO] [stdout] = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml` [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 198 + use std::thread; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:208:16 [INFO] [stdout] | [INFO] [stdout] 200 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_199_0() { [INFO] [stdout] | ----------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 208 | handler.join().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: E0433, E0728. [INFO] [stdout] For more information about an error, try `rustc --explain E0433`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - spawn (line 326) stdout ---- [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:332:16 [INFO] [stdout] | [INFO] [stdout] 327 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_326_0() { [INFO] [stdout] | ----------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 332 | handler.join().await.unwrap(); [INFO] [stdout] | ^^^^^ only allowed inside `async` functions and blocks [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0728`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - spawn (line 340) stdout ---- [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:356:15 [INFO] [stdout] | [INFO] [stdout] 341 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_340_0() { [INFO] [stdout] | ----------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 356 | sender.join().await.expect("The sender thread has panicked"); [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:357:17 [INFO] [stdout] | [INFO] [stdout] 341 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_340_0() { [INFO] [stdout] | ----------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 357 | receiver.join().await.expect("The receiver thread has panicked"); [INFO] [stdout] | ^^^^^ only allowed inside `async` functions and blocks [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0728`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - JoinHandle::join (line 92) stdout ---- [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:99:20 [INFO] [stdout] | [INFO] [stdout] 93 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_92_0() { [INFO] [stdout] | ---------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 99 | join_handle.join().await.expect("Couldn't join on the associated thread"); [INFO] [stdout] | ^^^^^ only allowed inside `async` functions and blocks [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0728`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - spawn (line 362) stdout ---- [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:369:33 [INFO] [stdout] | [INFO] [stdout] 363 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_362_0() { [INFO] [stdout] | ----------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 369 | let result = computation.join().await.unwrap(); [INFO] [stdout] | ^^^^^ only allowed inside `async` functions and blocks [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0728`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - JoinHandle (line 48) stdout ---- [INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread` [INFO] [stdout] --> src/lib.rs:55:9 [INFO] [stdout] | [INFO] [stdout] 55 | thread::sleep(Duration::from_millis(10)); [INFO] [stdout] | ^^^^^^ use of unresolved module or unlinked crate `thread` [INFO] [stdout] | [INFO] [stdout] = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml` [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 47 + use std::thread; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread` [INFO] [stdout] --> src/lib.rs:67:1 [INFO] [stdout] | [INFO] [stdout] 67 | thread::sleep(Duration::from_millis(1000)); [INFO] [stdout] | ^^^^^^ use of unresolved module or unlinked crate `thread` [INFO] [stdout] | [INFO] [stdout] = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml` [INFO] [stdout] help: consider importing this module [INFO] [stdout] | [INFO] [stdout] 47 + use std::thread; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks [INFO] [stdout] --> src/lib.rs:61:24 [INFO] [stdout] | [INFO] [stdout] 49 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_48_0() { [INFO] [stdout] | ---------------------------------- this is not `async` [INFO] [stdout] ... [INFO] [stdout] 61 | original_thread.join().await.expect("The thread being joined has panicked"); [INFO] [stdout] | ^^^^^ only allowed inside `async` functions and blocks [INFO] [stdout] [INFO] [stdout] error: aborting due to 3 previous errors [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0433, E0728. [INFO] [stdout] For more information about an error, try `rustc --explain E0433`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/lib.rs - (line 3) [INFO] [stdout] src/lib.rs - Builder::name (line 199) [INFO] [stdout] src/lib.rs - Builder::new (line 172) [INFO] [stdout] src/lib.rs - Builder::spawn (line 256) [INFO] [stdout] src/lib.rs - JoinHandle (line 48) [INFO] [stdout] src/lib.rs - JoinHandle::join (line 92) [INFO] [stdout] src/lib.rs - spawn (line 326) [INFO] [stdout] src/lib.rs - spawn (line 340) [INFO] [stdout] src/lib.rs - spawn (line 362) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 5 passed; 9 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.41s [INFO] [stdout] [INFO] [stderr] error: doctest failed, to rerun pass `--doc` [INFO] running `Command { std: "docker" "inspect" "e2189101bd3d6356a91dfc75121b5de381d6d9911991911a6a73980fb45ac45c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e2189101bd3d6356a91dfc75121b5de381d6d9911991911a6a73980fb45ac45c", kill_on_drop: false }` [INFO] [stdout] e2189101bd3d6356a91dfc75121b5de381d6d9911991911a6a73980fb45ac45c