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-rw-r--r--pym/_emerge/depgraph.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/pym/_emerge/depgraph.py b/pym/_emerge/depgraph.py
index 568a11682..3cd44dd4e 100644
--- a/pym/_emerge/depgraph.py
+++ b/pym/_emerge/depgraph.py
@@ -4109,6 +4109,9 @@ class depgraph(object):
for flag, state in target_use.items():
real_flag = pkg.iuse.get_real_flag(flag)
+ if real_flag is None:
+ # Triggered by use-dep defaults.
+ continue
if state:
if real_flag not in old_use:
if new_changes.get(real_flag) == False: