Having ? outside of a string can cause an infinite loop

[ManlyMarco]

To reproduce simply pass a string with ? in it that's outside of a string to ScriptEvaluator.GetCompletions, for example ScriptEvaluator.GetCompletions("abc?efg"). Easy to reproduce with repl inside of runtime editor. It doesn't lock up when evaluating the same string.

also a | followed by a ? breaks as well, even when inside of a string
even something like "asda|adjasdjaskdj?asd"