Bug #813342: Start the IDLE subprocess with -Qnew if the parent

is started with that option.

Lib/idlelib/PyShell.py

@@ -351,6 +351,8 @@ class ModifiedInterpreter(InteractiveInterpreter):
 
     def build_subprocess_arglist(self):
         w = ['-W' + s for s in sys.warnoptions]
+        if 1/2 > 0: # account for new division
+            w.append('-Qnew')
         # Maybe IDLE is installed and is being accessed via sys.path,
         # or maybe it's not installed and the idle.py script is being
         # run from the IDLE source directory.

Misc/NEWS

@@ -75,6 +75,9 @@ Core and builtins
 Library
 -------
 
+- Bug #813342: Start the IDLE subprocess with -Qnew if the parent
+  is started with that option.
+
 - Bug #1565150: Fix subsecond processing for os.utime on Windows.
 
 - Support for MSVC 8 was added to bdist_wininst.