--- a/js/xpconnect/src/qsgen.py
+++ b/js/xpconnect/src/qsgen.py
@@ -1093,20 +1093,17 @@ def writeSpecs(f, elementType, varname, 
     f.write("};\n\n")
 
 def writeDefiner(f, conf, stringtable, interfaces):
     f.write("// === Definer\n\n")
 
     # Write out the properties and functions
     propspecs_indices = {}
     funcspecs_indices = {}
-    prop_array_name = "all_properties"
     func_array_name = "all_functions"
-    writeSpecs(f, "xpc_qsPropertySpec", prop_array_name,
-               "propspecs", propspecs_indices, interfaces)
     writeSpecs(f, "xpc_qsFunctionSpec", func_array_name,
                "funcspecs", funcspecs_indices, interfaces)
 
     # generate the static hash table
     loadFactor = 0.6
     size = int(len(interfaces) / loadFactor)
     buckets = [[] for i in range(size)]
     for iface in interfaces:
@@ -1142,16 +1139,17 @@ def writeDefiner(f, conf, stringtable, i
                      % (m3[0:2], m3[2:4], m4[0:2], m4[2:4],
                         m4[4:6], m4[6:8], m4[8:10], m4[10:12]))
             iid = ('{0x%s, 0x%s, 0x%s, %s}' % (m0, m1, m2, m3arr))
 
             # properties fields
             prop_index = 0
             prop_n_entries = 0
             if iface.propspecs:
+                assert False
                 prop_index = propspecs_indices[iface.name]
                 prop_n_entries = len(iface.propspecs)
 
             # member fields
             func_index = 0
             func_n_entries = 0
             if iface.funcspecs:
                 func_index = funcspecs_indices[iface.name]
@@ -1188,31 +1186,31 @@ def writeDefiner(f, conf, stringtable, i
     f.write("\n    };\n\n")
     f.write("// Make sure our table indices aren't overflowed\n"
             "PR_STATIC_ASSERT((sizeof(tableData) / sizeof(tableData[0])) < (1 << (8 * sizeof(tableData[0].parentInterface))));\n"
             "PR_STATIC_ASSERT((sizeof(tableData) / sizeof(tableData[0])) < (1 << (8 * sizeof(tableData[0].chain))));\n\n")
 
     # The string table for property and method names.
     table_name = "stringtab"
     stringtable.writeDefinition(f, table_name)
-    structNames = [prop_array_name, func_array_name]
+    structNames = [func_array_name]
     for name in structNames:
         f.write("PR_STATIC_ASSERT(sizeof(%s) < (1 << (8 * sizeof(%s[0].name_index))));\n"
                 % (table_name, name))
     f.write("\n")
 
     # the definer function (entry point to this quick stubs file)
     f.write("namespace xpc {\n")
     f.write("bool %s_DefineQuickStubs(" % conf.name)
     f.write("JSContext *cx, JSObject *proto, unsigned flags, uint32_t count, "
             "const nsID **iids)\n"
             "{\n")
     f.write("    return !!xpc_qsDefineQuickStubs("
             "cx, proto, flags, count, iids, %d, tableData, %s, %s, %s);\n" % (
-            size, prop_array_name, func_array_name, table_name))
+            size, "nullptr", func_array_name, table_name))
     f.write("}\n")
     f.write("} // namespace xpc\n\n\n")
 
 
 stubTopTemplate = '''\
 /* THIS FILE IS AUTOGENERATED - DO NOT EDIT */
 #include "jsapi.h"
 #include "qsWinUndefs.h"