Fix build failure on latest nightly

```
error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
 --> tests/no-std/../include/basic.rs:3:1
  |
3 | #[stream(item = ())]
  | ^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the attribute macro `stream` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `#[coroutine]` to make this closure a coroutine
  |
3 | #[coroutine] #[stream(item = ())]
  | ++++++++++++

error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
 --> tests/no-std/../include/basic.rs:6:1
  |
6 | #[stream(item = ())]
  | ^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the attribute macro `stream` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `#[coroutine]` to make this closure a coroutine
  |
6 | #[coroutine] #[stream(item = ())]
  | ++++++++++++

error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
  --> tests/no-std/../include/basic.rs:17:1
   |
17 | #[try_stream(ok = (), error = ())]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in the attribute macro `try_stream` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `#[coroutine]` to make this closure a coroutine
   |
17 | #[coroutine] #[try_stream(ok = (), error = ())]
   | ++++++++++++

error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
  --> tests/no-std/../include/basic.rs:28:1
   |
28 | #[stream(item = ())]
   | ^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in the attribute macro `stream` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `#[coroutine]` to make this closure a coroutine
   |
28 | #[coroutine] #[stream(item = ())]
   | ++++++++++++

error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
  --> tests/no-std/../include/basic.rs:41:1
   |
41 | #[try_stream(ok = (), error = ())]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in the attribute macro `try_stream` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `#[coroutine]` to make this closure a coroutine
   |
41 | #[coroutine] #[try_stream(ok = (), error = ())]
   | ++++++++++++

error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
  --> tests/no-std/../include/basic.rs:54:1
   |
54 | #[stream(item = ())]
   | ^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in the attribute macro `stream` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `#[coroutine]` to make this closure a coroutine
   |
54 | #[coroutine] #[stream(item = ())]
   | ++++++++++++

error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
  --> tests/no-std/../include/basic.rs:69:1
   |
69 | #[try_stream(ok = (), error = ())]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in the attribute macro `try_stream` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use `#[coroutine]` to make this closure a coroutine
   |
69 | #[coroutine] #[try_stream(ok = (), error = ())]
   | ++++++++++++
```

.clippy.toml

@@ -11,4 +11,4 @@ disallowed-methods = [
     { path = "std::env::set_var", reason = "this is not thread-safe and inherently unsafe; see <https://github.com/rust-lang/rust/issues/27970> for more" },
 ]
 disallowed-types = []
-msrv = "1.74" # nightly-2023-10-29 is 1.75 but not full 1.75 since it is nightly.
+msrv = "1.78" # nightly-2024-04-25 is 1.79 but not full 1.79 since it is nightly.

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
           # This is the minimum supported Rust version of this crate.
           # When updating this, the reminder to update the minimum supported
           # Rust version in README.md and .clippy.toml.
-          - nightly-2023-10-29
+          - nightly-2024-04-25
           - nightly
     runs-on: ubuntu-latest
     timeout-minutes: 60

CHANGELOG.md

@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Fix build failure on latest nightly (nightly-2024-04-25+). ([#97](https://github.com/taiki-e/futures-async-stream/issues/97))
+
 ## [0.2.10] - 2024-01-12
 
 - Fix "unexpected token" error on the comma following the async block. ([#94](https://github.com/taiki-e/futures-async-stream/pull/94), thanks @ethe)

README.md

@@ -21,7 +21,7 @@ futures-async-stream = "0.2"
 futures = "0.3"
 ```
 
-*Compiler support: requires rustc nightly-2023-10-29+*
+*Compiler support: requires rustc nightly-2024-04-25+*
 
 ## `#[for_await]`
 

futures-async-stream-macro/src/stream.rs

@@ -304,7 +304,7 @@ fn expand_async_body(inputs: Punctuated<FnArg, Token![,]>) -> (Vec<FnArg>, Vec<S
     // into:
     //
     //      fn foo(self: <ty>, mut __arg1: <ty>) -> impl Stream<Item = u32> {
-    //          from_coroutine(static move || {
+    //          from_coroutine(#[coroutine] static move || {
     //              let ref <ident> = __arg1;
     //
     //              // ...
@@ -375,6 +375,7 @@ fn make_gen_body(
     let task_context = def_site_ident!("__task_context");
     let body = quote! {
         #gen_function(
+            #[coroutine]
             static #capture |
                 mut #task_context: ::futures_async_stream::__private::future::ResumeTy,
             | -> #ret_ty {

src/lib.rs

@@ -17,7 +17,7 @@ futures-async-stream = "0.2"
 futures = "0.3"
 ```
 
-*Compiler support: requires rustc nightly-2023-10-29+*
+*Compiler support: requires rustc nightly-2024-04-25+*
 
 ## `#[for_await]`