acorn-loose with jsx plugin

[jasonhocker]

I am trying to switch from acorn to acorn-loose. When I add the jsx plugin I get an error.

const ast = acorn.LooseParser.extend(jsx()).parse(code, { ecmaVersion: "latest", sourceType: "module" });

TypeError: this.curContext is not a function
at LooseParser.readToken
at LooseParser.next
at LooseParser.parse
at Function.parse

Is this an issue with the jsx plugin or acorn-loose? Or do I need to do more to enable these to work together?