Decimal numbers immediately following a return marked as invalid

[winstliu]

Prerequisites have been fulfilled.

The following code snippet is valid, albeit ugly:

function test() { return.5 }
console.log(test()) // 0.5

I looked at fixing this but in order to ensure that sreturn.5 isn't matched you would need a more complicated lookbehind than Oniguruma allows (such as (?<=\breturn)). Maybe I'm missing something or there's a better way.