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-rw-r--r--pym/portage/dbapi/porttree.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/pym/portage/dbapi/porttree.py b/pym/portage/dbapi/porttree.py
index 956d6a80a..77c88c85a 100644
--- a/pym/portage/dbapi/porttree.py
+++ b/pym/portage/dbapi/porttree.py
@@ -908,7 +908,10 @@ class portdbapi(dbapi):
invalid_category = mysplit[0] not in self._categories
d={}
if mytree:
- mytrees = [mytree]
+ if isinstance(mytree, str):
+ mytrees = [mytree]
+ elif not isinstance(mytree, list):
+ raise AssertionError("Invalid input type: %s" %str(type(mytree)))
else:
mytrees = self.porttrees
for oroot in mytrees: