Fix infinite loop introduced by 685b51e

src/loose/expression.js

@@ -402,6 +402,7 @@ lp.parseIdent = function() {
   let name = this.tok.type === tt.name ? this.tok.value : this.tok.type.keyword
   if (!name) return this.dummyIdent()
   let node = this.startNode()
+  this.next()
   node.name = name
   return this.finishNode(node, "Identifier")
 }