From 28c6ce97143e9eb02daee9c1e027b07cec2d00c9 Mon Sep 17 00:00:00 2001
From: Massimiliano Culpo <massimiliano.culpo@gmail.com>
Date: Mon, 7 Sep 2020 20:53:59 +0200
Subject: [PATCH] SpecList: remove mutable types from __init__ arguments
(#18515)
fixes #18439
---
lib/spack/spack/spec_list.py | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/lib/spack/spack/spec_list.py b/lib/spack/spack/spec_list.py
index bc473f530c..1aa0ab870e 100644
--- a/lib/spack/spack/spec_list.py
+++ b/lib/spack/spack/spec_list.py
@@ -25,7 +25,11 @@ def spec_ordering_key(s):
class SpecList(object):
- def __init__(self, name='specs', yaml_list=[], reference={}):
+ def __init__(self, name='specs', yaml_list=None, reference=None):
+ # Normalize input arguments
+ yaml_list = yaml_list or []
+ reference = reference or {}
+
self.name = name
self._reference = reference # TODO: Do we need defensive copy here?
--
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