fix corner case in inline (#5088)

fixes #5087

lib/compress.js

@@ -9957,8 +9957,10 @@ merge(Compressor.prototype, {
             }));
 
             function process(ref, name) {
+                var def = name.definition();
+                def.references.push(ref);
                 var symbol = make_node(AST_SymbolVar, name, name);
-                name.definition().orig.push(symbol);
+                def.orig.push(symbol);
                 append_var(decls, expressions, symbol);
             }
         }