Tried to get the recursion issues with if stmts working.

jedi/evaluate/__init__.py

@@ -189,19 +189,19 @@ class Evaluator(object):
         elif isinstance(element, iterable.MergedNodes):
             return set(iterable.unite(self.eval_element(e) for e in element))
 
-        parent = element.get_parent_until((tree.IfStmt, tree.ForStmt, tree.IsScope))
-        predefined_if_name_dict = self.predefined_if_name_dict_dict.get(parent)
-        if not predefined_if_name_dict and isinstance(parent, tree.IfStmt):
-            if_stmt = parent.children[1]
+        if_stmt = element.get_parent_until((tree.IfStmt, tree.ForStmt, tree.IsScope))
+        predefined_if_name_dict = self.predefined_if_name_dict_dict.get(if_stmt)
+        if not predefined_if_name_dict and isinstance(if_stmt, tree.IfStmt):
+            if_stmt_test = if_stmt.children[1]
             name_dicts = [{}]
             # If we already did a check, we don't want to do it again -> If
             # predefined_if_name_dict_dict is filled, we stop.
             # We don't want to check the if stmt itself, it's just about
             # the content.
-            if element.start_pos > if_stmt.end_pos:
+            if element.start_pos > if_stmt_test.end_pos:
                 # Now we need to check if the names in the if_stmt match the
                 # names in the suite.
-                if_names = helpers.get_names_of_node(if_stmt)
+                if_names = helpers.get_names_of_node(if_stmt_test)
                 element_names = helpers.get_names_of_node(element)
                 str_element_names = [str(e) for e in element_names]
                 if any(str(i) in str_element_names for i in if_names):
@@ -234,11 +234,11 @@ class Evaluator(object):
             if len(name_dicts) > 1:
                 result = set()
                 for name_dict in name_dicts:
-                    self.predefined_if_name_dict_dict[parent] = name_dict
+                    self.predefined_if_name_dict_dict[if_stmt] = name_dict
                     try:
                         result |= self._eval_element_not_cached(element)
                     finally:
-                        del self.predefined_if_name_dict_dict[parent]
+                        del self.predefined_if_name_dict_dict[if_stmt]
                 return result
             else:
                 return self._eval_element_cached(element)

jedi/parser/tree.py

@@ -985,8 +985,19 @@ class IfStmt(Flow):
                 yield self.children[i + 1]
 
     def node_in_which_check_node(self, node):
+        """
+        Returns the check node (see function above) that a node is contained
+        in. However if it the node is in the check node itself and not in the
+        suite return None.
+        """
+        start_pos = node.start_pos
         for check_node in reversed(list(self.check_nodes())):
-            if check_node.start_pos < node.start_pos:
+            if check_node.start_pos < start_pos:
+                if start_pos < check_node.end_pos:
+                    return None
+                    # In this case the node is within the check_node itself,
+                    # not in the suite
+                else:
                     return check_node
 
     def node_after_else(self, node):

test/completion/flow_analysis.py

@@ -218,3 +218,23 @@ else:
     a = ''
 #? int()
 a
+
+
+# -----------------
+# Recursion issues
+# -----------------
+
+def possible_recursion_error(filename):
+    if filename == 'a':
+        return filename
+    # It seems like without the brackets there wouldn't be a RecursionError.
+    elif type(filename) == str:
+        return filename
+
+
+if NOT_DEFINED:
+    s = str()
+else:
+    s = str()
+#? str()
+possible_recursion_error(s)

test/conftest.py

@@ -6,6 +6,7 @@ import pytest
 from . import helpers
 from . import run
 from . import refactor
+
 import jedi
 from jedi.evaluate.analysis import Warning