fixup process termination detection on windows

src/guiloop/glutinloop.rs

@@ -246,6 +246,8 @@ impl GuiEventLoop {
         loop {
             match self.tick_rx.try_recv() {
                 Ok(_) => {
+                    #[cfg(not(unix))]
+                    self.test_for_child_exit();
                     self.do_paint();
                 }
                 Err(TryRecvError::Empty) => return Ok(()),
@@ -261,6 +263,15 @@ impl GuiEventLoop {
         loop {
             match self.sigchld_rx.try_recv() {
                 Ok(_) => {
+                    self.test_for_child_exit();
+                }
+                Err(TryRecvError::Empty) => return Ok(()),
+                Err(err) => bail!("paster_rx disconnected {:?}", err),
+            }
+        }
+    }
+
+    fn test_for_child_exit(&self) {
         let window_ids: Vec<WindowId> = self
             .windows
             .borrow_mut()
@@ -273,12 +284,7 @@ impl GuiEventLoop {
             .collect();
 
         for window_id in window_ids {
-                        self.schedule_window_close(window_id)?;
+            self.schedule_window_close(window_id).ok();
-                    }
-                }
-                Err(TryRecvError::Empty) => return Ok(()),
-                Err(err) => bail!("paster_rx disconnected {:?}", err),
-            }
         }
     }
 

src/winpty.rs

@@ -13,6 +13,7 @@ use winpty::winapi::shared::minwindef::DWORD;
 use winpty::winapi::shared::winerror::{HRESULT, S_OK};
 use winpty::winapi::um::fileapi::{ReadFile, WriteFile};
 use winpty::winapi::um::handleapi::*;
+use winpty::winapi::um::minwinbase::STILL_ACTIVE;
 use winpty::winapi::um::namedpipeapi::CreatePipe;
 use winpty::winapi::um::processthreadsapi::*;
 use winpty::winapi::um::winbase::EXTENDED_STARTUPINFO_PRESENT;
@@ -291,7 +292,11 @@ impl Child {
         let mut status: DWORD = 0;
         let res = unsafe { GetExitCodeProcess(self.proc.handle, &mut status) };
         if res != 0 {
+            if status == STILL_ACTIVE {
+                Ok(None)
+            } else {
                 Ok(Some(ExitStatus { status }))
+            }
         } else {
             Ok(None)
         }