Issue 13296: Fix IDLE to clear compile __future__ flags on shell restart.

(Patch by Roger Serwy)

Lib/idlelib/PyShell.py

@@ -340,6 +340,7 @@ class ModifiedInterpreter(InteractiveInterpreter):
         self.restarting = False
         self.subprocess_arglist = None
         self.port = PORT
+        self.original_compiler_flags = self.compile.compiler.flags
 
     rpcclt = None
     rpcsubproc = None
@@ -447,6 +448,7 @@ class ModifiedInterpreter(InteractiveInterpreter):
             gui = RemoteDebugger.restart_subprocess_debugger(self.rpcclt)
             # reload remote debugger breakpoints for all PyShellEditWindows
             debug.load_breakpoints()
+        self.compile.compiler.flags = self.original_compiler_flags
         self.restarting = False
         return self.rpcclt
 

Misc/NEWS

@@ -347,6 +347,9 @@ Core and Builtins
 Library
 -------
 
+- Issue 13296: Fix IDLE to clear compile __future__ flags on shell restart.
+  (Patch by Roger Serwy)
+
 - Fix the xmlrpc.client user agent to return something similar to
   urllib.request user agent: "Python-xmlrpc/3.3".