X-Git-Url: https://git.rkrishnan.org/?a=blobdiff_plain;f=src%2Fallmydata%2Fnodemaker.py;h=d590bf5aea63a4fb0c3d817b07bd9486ccc01e30;hb=45c64edc768eca0f2bca474f03d332a9ada70a8b;hp=c820c71ca1732a8ced1d8397be55c6e5685c3b5d;hpb=8df3a076255caeac1035ab87e515b5820bb59304;p=tahoe-lafs%2Ftahoe-lafs.git

diff --git a/src/allmydata/nodemaker.py b/src/allmydata/nodemaker.py
index c820c71c..d590bf5a 100644
--- a/src/allmydata/nodemaker.py
+++ b/src/allmydata/nodemaker.py
@@ -72,12 +72,12 @@ class NodeMaker:
             cap = uri.from_string(bigcap, deep_immutable=deep_immutable,
                                   name=name)
             node = self._create_from_single_cap(cap)
-            if node:
-                self._node_cache[memokey] = node  # note: WeakValueDictionary
-            else:
+            if node is None:
                 # don't cache UnknownNode
                 node = UnknownNode(writecap, readcap,
                                    deep_immutable=deep_immutable, name=name)
+            elif node.is_mutable():
+                self._node_cache[memokey] = node  # note: WeakValueDictionary
 
         if self.blacklist:
             si = node.get_storage_index()