From 9ee3c7ff890760f1d5d018236e85eff85c36da9f Mon Sep 17 00:00:00 2001
From: jan <jan@orange.mpxd.net>
Date: Sun, 8 Mar 2026 20:01:00 -0700
Subject: [PATCH] [ILibrary] make referenced_patterns more robust to cyclical
 dependencies

---
 masque/library.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/masque/library.py b/masque/library.py
index b730fba..f3e2d3c 100644
--- a/masque/library.py
+++ b/masque/library.py
@@ -186,9 +186,9 @@ class ILibraryView(Mapping[str, 'Pattern'], metaclass=ABCMeta):
         # Perform recursive lookups, but only once for each name
         for target in targets - skip:
             assert target is not None
+            skip.add(target)
             if target in self:
                 targets |= self.referenced_patterns(target, skip=skip)
-            skip.add(target)
 
         return targets