Explicitly ignore into_raw_handle() using let _ = in sys/pal/windows.

Author: zachs18

std/src/sys/pal/windows/process.rs

@@ -571,7 +571,7 @@ impl Stdio {
             Ok(io) => unsafe {
                 let io = Handle::from_raw_handle(io);
                 let ret = io.duplicate(0, true, c::DUPLICATE_SAME_ACCESS);
-                io.into_raw_handle();
+                let _ = io.into_raw_handle(); // Don't close the handle
                 ret
             },
             // If no stdio handle is available, then propagate the null value.

std/src/sys/pal/windows/stdio.rs

@@ -101,7 +101,7 @@ fn write(
         unsafe {
             let handle = Handle::from_raw_handle(handle);
             let ret = handle.write(data);
-            handle.into_raw_handle(); // Don't close the handle
+            let _ = handle.into_raw_handle(); // Don't close the handle
             return ret;
         }
     }
@@ -250,7 +250,7 @@ impl io::Read for Stdin {
             unsafe {
                 let handle = Handle::from_raw_handle(handle);
                 let ret = handle.read(buf);
-                handle.into_raw_handle(); // Don't close the handle
+                let _ = handle.into_raw_handle(); // Don't close the handle
                 return ret;
             }
         }