.

wcfs/wcfs_test.py

@@ -741,9 +741,8 @@ class tFile:
 
 # tWatch represents watch for one file setup on a tWatchLink.
 class tWatch:
-    def __init__(w, zfile):
-        assert isinstance(zfile, ZBigFile)
-        w.foid   = zfile._p_oid
+    def __init__(w, foid):
+        w.foid   = foid
         w.at     = z64  # not None - always concrete
         w.pinned = {}   # blk -> rev
 
@@ -1006,7 +1005,7 @@ def watch(twlink, zf, at, pinok=None): # -> tWatch
     t = twlink.tdb
     w = twlink._watching.get(zf)
     if w is None:
-        w = twlink._watching[zf] = tWatch(zf)
+        w = twlink._watching[zf] = tWatch(zf._p_oid)
         at_prev = None
     else:
         at_prev = w.at  # we were previously watching zf @at_prev