Pattern matching in condition with literals generates incorrect code

[edemaine]

if {type: "Identifier", name: "Infinity"} := end
  true

generates this invalid code:

let ref;if ((ref = end) && 'type' in ref && ref.type === "Identifier" && 'name' in ref && ref.name === "Infinity") {
  const {type: "Identifier", name: "Infinity"} = ref;
  true
}

Regular expressions are similarly problematic.