alnyan/yggdrasil: PollWait now returns errors

library/std/src/os/yggdrasil/io/poll.rs

@@ -24,11 +24,14 @@ impl PollChannel {
     }
 
     #[unstable(feature = "yggdrasil_os", issue = "none")]
-    pub fn wait(&mut self, timeout: Option<Duration>) -> io::Result<Option<RawFd>> {
+    pub fn wait(
+        &mut self,
+        timeout: Option<Duration>,
+    ) -> io::Result<Option<(RawFd, io::Result<()>)>> {
         let mut output = None;
         cvt_io(unsafe {
             yggdrasil_rt::sys::poll_channel_wait(self.0.as_raw_fd(), &timeout, &mut output)
         })?;
-        Ok(output)
+        Ok(output.map(|(l, r)| (l, cvt_io(r))))
     }
 }