.

wcfs/internal/_wcfs.pyx

@@ -127,7 +127,10 @@ cdef class PyFileH:
     property pinned:
         def __get__(PyFileH pywfileh):
             # XXX cast: needed for cython to automatically convert to py dict
-            return <unordered_map[int64_t, Tid]> _tfileh_pinned(pywfileh.wfileh)
+            cdef dict p = <unordered_map[int64_t, Tid]> _tfileh_pinned(pywfileh.wfileh)
+            for blk in p:
+                p[blk] = p64(p[blk])    # rev(int64) -> rev(bytes)
+            return p
 
 
 cdef class PyMapping: