Exotic identifiers as field names broken on master

[cknitt]

type test = {\"TEST": int}

let test = {\"TEST": 42}

now compiles to

let test = {
  "\\\"TEST\"": 42
};

instead of

let test = {
  TEST: 42
};

@cometkim Could this be a side effect of #6777/#6779?

[cometkim]

Hmmm, would they be represented as Lident in the AST?

[cometkim]

Ok let me check it. I think we need to modify the parser then It's the backend (Js_dump)