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-rw-r--r--cloudinit/util.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/cloudinit/util.py b/cloudinit/util.py
index deb4b33b..64007211 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -238,7 +238,9 @@ def logexc(log,lvl=logging.DEBUG):
class RecursiveInclude(Exception):
pass
-def read_file_with_includes(fname, rel = ".", stack=[], patt = None):
+def read_file_with_includes(fname, rel = ".", stack=None, patt = None):
+ if stack is None:
+ stack = []
if not fname.startswith("/"):
fname = os.sep.join((rel, fname))