Auto merge of #2738 - RalfJung:rustup, r=RalfJung

Rustup

1 files changed, 6 insertions, 4 deletions

diff --git a/library/std/src/process.rs b/library/std/src/process.rs
index 400d25beb26..17aff342c15 100644
--- a/library/std/src/process.rs
+++ b/library/std/src/process.rs
@@ -362,6 +362,10 @@ impl Read for ChildStdout {
     fn is_read_vectored(&self) -> bool {
         self.inner.is_read_vectored()
     }
+
+    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
+        self.inner.read_to_end(buf)
+    }
 }
 
 impl AsInner<AnonPipe> for ChildStdout {
@@ -907,10 +911,8 @@ impl Command {
     /// ```
     #[stable(feature = "process", since = "1.0.0")]
     pub fn output(&mut self) -> io::Result<Output> {
-        self.inner
-            .spawn(imp::Stdio::MakePipe, false)
-            .map(Child::from_inner)
-            .and_then(|p| p.wait_with_output())
+        let (status, stdout, stderr) = self.inner.output()?;
+        Ok(Output { status: ExitStatus(status), stdout, stderr })
     }
 
     /// Executes a command as a child process, waiting for it to finish and