std: Push process stdio setup in std::sys

Most of this is platform-specific anyway, and we generally have to jump through
fewer hoops to do the equivalent operation on Windows. One benefit for Windows
today is that this new structure avoids an extra `DuplicateHandle` when creating
pipes. For Unix, however, the behavior should be the same.

Note that this is just a pure refactoring, no functionality was added or
removed.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/libstd/sys/windows/ext/process.rs b/src/libstd/sys/windows/ext/process.rs
index dffe68915fb..f6ee59eec32 100644
--- a/src/libstd/sys/windows/ext/process.rs
+++ b/src/libstd/sys/windows/ext/process.rs
@@ -21,7 +21,8 @@ use sys_common::{AsInner, FromInner, IntoInner};
 impl FromRawHandle for process::Stdio {
     unsafe fn from_raw_handle(handle: RawHandle) -> process::Stdio {
         let handle = sys::handle::Handle::new(handle as *mut _);
-        process::Stdio::from_inner(handle)
+        let io = sys::process::Stdio::Handle(handle);
+        process::Stdio::from_inner(io)
     }
 }