1 files changed, 3 insertions, 1 deletions
diff --git a/Lib/ast.py b/Lib/ast.py
index 8adb61f..1a94e93 100644
--- a/Lib/ast.py
+++ b/Lib/ast.py
@@ -54,10 +54,12 @@ def parse(source, filename='<unknown>', mode='exec', *,
 
 def literal_eval(node_or_string):
     """
-    Safely evaluate an expression node or a string containing a Python
+    Evaluate an expression node or a string containing only a Python
     expression.  The string or node provided may only consist of the following
     Python literal structures: strings, bytes, numbers, tuples, lists, dicts,
     sets, booleans, and None.
+
+    Caution: A complex expression can overflow the C stack and cause a crash.
     """
     if isinstance(node_or_string, str):
         node_or_string = parse(node_or_string.lstrip(" \t"), mode='eval')