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-rw-r--r--pym/portage/__init__.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/pym/portage/__init__.py b/pym/portage/__init__.py
index 4b68cefb2..f0cc471e9 100644
--- a/pym/portage/__init__.py
+++ b/pym/portage/__init__.py
@@ -1725,7 +1725,9 @@ class config(object):
# revmaskdict
self.prevmaskdict={}
for x in self.packages:
- x = portage.dep.Atom(x.lstrip('*'))
+ # Negative atoms are filtered by the above stack_lists() call.
+ if not isinstance(x, dep.Atom):
+ x = dep.Atom(x.lstrip('*'))
self.prevmaskdict.setdefault(x.cp, []).append(x)
self._pkeywords_list = []