diff --git a/main.py b/main.py
index 3a59673..7481360 100644
--- a/main.py
+++ b/main.py
@@ -10,9 +10,12 @@ import sys, os, json, traceback
 EXIT_SUCCESS=0
 EXIT_ERROR=1
 
-def warn(message):
+def warn(message, is_exception=False):
     print("WARNING: "+str(message), file=sys.stderr)
-    traceback.print_stack()
+    if is_exception:
+        traceback.print_exc()
+    else:
+        traceback.print_stack()
 
 def error(message, is_exception=True, handle_gracefully=True):
     print("ERROR: "+str(message), file=sys.stderr)