RegExp CharacterRange early error

[Jack-Works]

eshost -s -e '/[\d-\D]/.test("1")'

#### engine262

SyntaxError: Invalid class range

#### javascriptcore, spidermonkey, v8
true

#### xs

SyntaxError: [\d-\D] invalid range

Per spec, it should be an Early Error:

[michaelficarra]

So what are you asking of us here? Are you trying to say this is a web reality issue that we should address with a spec change? If you think it's not relied upon on the web, you should report issues to each of the nonconforming engines.

[anba]

See Annex B https://tc39.es/ecma262/#sec-patterns-static-semantics-early-errors-annexb for why /[\d-\D]/ doesn't throw a SyntaxError in browsers.

[Jack-Works]

ok... I don't know this is an annex b thing before, I thought spec is wrong

[michaelficarra]

I'm going to re-open this. I don't think the Annex B reference at the top of this section is sufficient for readers. We should add Annex B references in each early error that is augmented by Annex B.