Fix wrong way of adding Error information in shutil.copytree.

diff --git a/Lib/shutil.py b/Lib/shutil.py
index 2d7a506b2ea2bedce111f03bce39436146094257..ef29ae2303c25d8a67bb7910fc21ac7b4c68d235 100644 (file)
--- a/Lib/shutil.py
+++ b/Lib/shutil.py
@@ -236,7 +236,7 @@ def copytree(src, dst, symlinks=False, ignore=None, copy_function=copy2,
             # Copying file access times may fail on Windows
             pass
         else:
-            errors.extend((src, dst, str(why)))
+            errors.append((src, dst, str(why)))
     if errors:
         raise Error(errors)