tests pass again

Signed-off-by: Yoshua Wuyts <yoshuawuyts@gmail.com>

src/stream/from_stream.rs

@@ -10,7 +10,7 @@ use std::pin::Pin;
 /// See also: [`IntoStream`].
 ///
 /// [`IntoStream`]: trait.IntoStream.html
-pub trait FromStream<T> {
+pub trait FromStream<T: Send> {
     /// Creates a value from a stream.
     ///
     /// # Examples
@@ -22,7 +22,7 @@ pub trait FromStream<T> {
     ///
     /// // let _five_fives = async_std::stream::repeat(5).take(5);
     /// ```
-    fn from_stream<'a, S: IntoStream<Item = T> + 'a>(
+    fn from_stream<'a, S: IntoStream<Item = T> + Send + 'a>(
         stream: S,
-    ) -> Pin<Box<dyn core::future::Future<Output = Self> + 'a>>;
+    ) -> Pin<Box<dyn core::future::Future<Output = Self> + Send + 'a>>;
 }

src/stream/into_stream.rs

@@ -18,13 +18,13 @@ pub trait IntoStream {
     type Item;
 
     /// Which kind of stream are we turning this into?
-    type IntoStream: Stream<Item = Self::Item>;
+    type IntoStream: Stream<Item = Self::Item> + Send;
 
     /// Creates a stream from a value.
     fn into_stream(self) -> Self::IntoStream;
 }
 
-impl<I: Stream> IntoStream for I {
+impl<I: Stream + Send> IntoStream for I {
     type Item = I::Item;
     type IntoStream = I;
 

src/stream/stream/mod.rs

@@ -91,7 +91,7 @@ cfg_if! {
         }
     } else {
         macro_rules! dyn_ret {
-            ($a:lifetime, $o:ty) => (Pin<Box<dyn core::future::Future<Output = $o> + 'a>>)
+            ($a:lifetime, $o:ty) => (Pin<Box<dyn core::future::Future<Output = $o> + Send + 'a>>)
         }
     }
 }
@@ -544,6 +544,7 @@ pub trait Stream {
     ///
     /// Basic usage:
     ///
+    /// ```
     /// # fn main() { async_std::task::block_on(async {
     /// #
     /// use async_std::prelude::*;
@@ -551,7 +552,6 @@ pub trait Stream {
     ///
     /// let mut s = stream::repeat::<u32>(42).take(3);
     /// assert!(s.any(|x| x ==  42).await);
-    ///
     /// #
     /// # }) }
     /// ```
@@ -704,7 +704,8 @@ pub trait Stream {
     #[must_use = "if you really need to exhaust the iterator, consider `.for_each(drop)` instead (TODO)"]
     fn collect<'a, B>(self) -> dyn_ret!('a, B)
     where
-        Self: futures_core::stream::Stream + Sized + 'a,
+        Self: futures_core::stream::Stream + Sized + Send + 'a,
+        <Self as futures_core::stream::Stream>::Item: Send,
         B: FromStream<<Self as futures_core::stream::Stream>::Item>,
     {
         FromStream::from_stream(self)

src/vec/from_stream.rs

@@ -2,13 +2,13 @@ use crate::stream::{FromStream, IntoStream, Stream};
 
 use std::pin::Pin;
 
-impl<T> FromStream<T> for Vec<T> {
+impl<T: Send> FromStream<T> for Vec<T> {
     #[inline]
     fn from_stream<'a, S: IntoStream<Item = T>>(
         stream: S,
-    ) -> Pin<Box<dyn core::future::Future<Output = Self> + 'a>>
+    ) -> Pin<Box<dyn core::future::Future<Output = Self> + Send + 'a>>
     where
-        <S as IntoStream>::IntoStream: 'a,
+        <S as IntoStream>::IntoStream: Send + 'a,
     {
         let stream = stream.into_stream();