* Clean up the imploded parse tree. Quotes around strings are

removed, paths are absolutised relative to the path containing the
  expression we just parsed, and integer literals are converted to
  actual integers.

src/fix-ng/fix-expr.cc

@@ -29,5 +29,5 @@ ATerm bottomupRewrite(TermFun & f, ATerm e)
         return (ATerm) ATreverse(out);
     }
 
-    throw badTerm("cannot rewrite", e);
+    return e;
 }