Index: Lib/site.py
===================================================================
--- Lib/site.py	(Revision 83405)
+++ Lib/site.py	(Arbeitskopie)
@@ -182,7 +182,12 @@
         return
     names = [name for name in names if name.endswith(".pth")]
     for name in sorted(names):
-        addpackage(sitedir, name, known_paths)
+        try:
+            addpackage(sitedir, name, known_paths)
+        except Exception as err:
+            print("Error processing %r:" % os.path.join(sitedir, name),
+                  err, file=sys.stderr)
+            continue
     if reset:
         known_paths = None
     return known_paths