diff -r 713db33a4ebc Lib/idlelib/PyShell.py
--- a/Lib/idlelib/PyShell.py	Sat Mar 10 23:43:12 2012 +0100
+++ b/Lib/idlelib/PyShell.py	Sun Mar 11 12:44:23 2012 -0500
@@ -431,6 +431,9 @@
         self.rpcclt.close()
         self.terminate_subprocess()
         console = self.tkconsole
+        if console.reading:
+            console.endoffile = True
+            console.top.quit()
         was_executing = console.executing
         console.executing = False
         self.spawn_subprocess()
@@ -1016,7 +1019,6 @@
         line = self.text.get("iomark", "end-1c")
         if len(line) == 0:  # may be EOF if we quit our mainloop with Ctrl-C
             line = "\n"
-        self.resetoutput()
         if self.canceled:
             self.canceled = 0
             if not use_subprocess:
@@ -1024,6 +1026,8 @@
         if self.endoffile:
             self.endoffile = 0
             line = ""
+        if line:
+            self.resetoutput()
         return line
 
     def isatty(self):