weakrefs also for parent_stmt

dynamic.py

@@ -90,7 +90,7 @@ def search_params(param):
 def check_array_additions(array):
     """ Just a mapper function for the internal _check_array_additions """
     is_list = array._array.type == 'list'
-    current_module = array._array.parent_stmt.get_parent_until()
+    current_module = array._array.parent_stmt().get_parent_until()
     return _check_array_additions(array, current_module, is_list)
 
 
@@ -124,8 +124,8 @@ def _check_array_additions(compare_array, module, is_list):
                 continue
             backtrack_path = iter(call_path[:separate_index])
 
-            position = c.parent_stmt.start_pos
-            scope = c.parent_stmt.parent()
+            position = c.parent_stmt().start_pos
+            scope = c.parent_stmt().parent()
             e = evaluate.follow_call_path(backtrack_path, scope, position)
             if not compare_array in e:
                 # the `append`, etc. belong to other arrays
@@ -193,7 +193,7 @@ class ArrayInstance(parsing.Base):
                     continue
             items += evaluate.handle_iterators([array])
 
-        module = self.var_args.parent_stmt.get_parent_until()
+        module = self.var_args.parent_stmt().get_parent_until()
         is_list = str(self.instance.name) == 'list'
         items += _check_array_additions(self.instance, module, is_list)
         return items

evaluate.py

@@ -204,8 +204,8 @@ class Instance(Executable):
         if args is None:
             args = helpers.generate_param_array([])
         method = self.get_subscope_by_name(name)
-        if args.parent_stmt is None:
-            args.parent_stmt = method
+        if args.parent_stmt() is None:
+            args.parent_stmt = weakref.ref(method)
         return Execution(method, args).get_return_types()
 
     def get_descriptor_return(self, obj):
@@ -275,11 +275,12 @@ class InstanceElement(object):
     def get_assignment_calls(self):
         # Copy and modify the array.
         origin = self.var.get_assignment_calls()
-        origin.parent_stmt, temp = None, origin.parent_stmt
         # Delete parent, because it isn't used anymore.
         new = helpers.fast_parent_copy(origin)
-        origin.parent_stmt = temp
-        new.parent_stmt = InstanceElement(self.instance, temp)
+        par = InstanceElement(self.instance, origin.parent_stmt())
+        new.parent_stmt = weakref.ref(par)
+        faked_scopes.append(par)
+        faked_scopes.append(new)
         return new
 
     def __getattr__(self, name):
@@ -382,6 +383,7 @@ class Function(parsing.Base):
                 # Create param array.
                 old_func = Function(f, is_decorated=True)
                 params = helpers.generate_param_array([old_func], old_func)
+                faked_scopes.append(old_func)
 
                 wrappers = Execution(decorator, params).get_return_types()
                 if not len(wrappers):
@@ -483,7 +485,7 @@ class Execution(Executable):
             """
             Create a param with the original scope (of varargs) as parent.
             """
-            parent_stmt = self.var_args.parent_stmt
+            parent_stmt = self.var_args.parent_stmt()
             calls = parsing.Array(parsing.Array.NOARRAY, parent_stmt)
             calls.values = values
             calls.keys = keys
@@ -1180,10 +1182,10 @@ def follow_call_list(call_list):
 
 def follow_call(call):
     """ Follow a call is following a function, variable, string, etc. """
-    scope = call.parent_stmt.parent()
+    scope = call.parent_stmt().parent()
     path = call.generate_call_path()
 
-    position = call.parent_stmt.start_pos
+    position = call.parent_stmt().start_pos
     return follow_call_path(path, scope, position)
 
 

functions.py

@@ -319,8 +319,8 @@ def set_debug_function(func_cb):
 
 def _clear_caches():
     evaluate.clear_caches()
-    import gc
     return
+    import gc
     #gc.set_debug(gc.DEBUG_STATS | gc.DEBUG_COLLECTABLE | gc.DEBUG_UNCOLLECTABLE | gc.DEBUG_OBJECTS)
     #gc.collect()
     count = 0

helpers.py

@@ -2,6 +2,7 @@ import copy
 import weakref
 
 import parsing
+import evaluate
 import debug
 import builtin
 
@@ -106,6 +107,9 @@ def fast_parent_copy2(obj):
 
         #print new_obj.__dict__
         for key, value in new_obj.__dict__.items():
+            #if key in ['_parent_stmt', 'parent_stmt', '_parent', 'parent']: print key, value
+            if key in ['parent', '_parent']:
+                continue
             if isinstance(value, list):
                 new_obj.__dict__[key] = list_rec(value)
             elif isinstance(value, classes):
@@ -133,4 +137,6 @@ def generate_param_array(args_tuple, parent_stmt=None):
             values.append([])
         else:
             values.append([arg])
-    return parsing.Array(parsing.Array.TUPLE, parent_stmt, values=values)
+    arr = parsing.Array(parsing.Array.TUPLE, parent_stmt, values=values)
+    evaluate.faked_scopes.append(arr)
+    return arr

parsing.py

@@ -781,16 +781,16 @@ class Call(object):
 
         self.next = None
         self.execution = None
-        self._parent_stmt = parent_stmt
+        self._parent_stmt = weakref.ref(parent_stmt) if parent_stmt else None
 
     @property
     def parent_stmt(self):
-        if self._parent_stmt:
+        if self._parent_stmt is not None:
             return self._parent_stmt
         elif self.parent:
             return self.parent.parent_stmt
         else:
-            return None
+            return lambda: None
 
     @parent_stmt.setter
     def parent_stmt(self, value):