Python 3 while1 grammar rules with COME_FROM_LOOP

test/simple_source/looping/04_while1_while1.py

@@ -7,3 +7,22 @@ while 1:
             raise RuntimeError
     else:
         raise RuntimeError
+
+while 1:
+    if __file__:
+        if __name__:
+            raise RuntimeError
+        else:
+            # flags
+            while __name__:
+                group = 5
+while 1:
+    if __name__:
+        while 1:
+            if y:
+                break
+            raise RuntimeError
+    elif __file__:
+        x = 2
+    else:
+        raise RuntimeError