'.val()' not added when prior() inside square brackets.

[siddhantkothari]

A simple reproducible example showing the bug:

.bolt file:
path /test/{x} is String{ validate() { this.parent()[prior(this)] == x } }
.json file produced:
{ "rules": { "test": { "$x": { ".validate": "(newData.isString() && newData.parent().child(data).val() == $x)" } } } }
.json file expected:
{ "rules": { "test": { "$x": { ".validate": "(newData.isString() && newData.parent().child(data.val()).val() == $x)" } } } }
Inside the child function data.val() should be present.
When I remove the prior(), the result is newData.val() as expected.

[Nickk4]

To add a similar issue where .val() is not added:

path /{project_uuid} {
  read() {
    projectMatch(this.parent_uuid)
  }
}

function projectMatch(parent_uuid) {
  return (
    auth != null &&
    parent_uuid != null &&
    auth[parent_uuid] != null
  );
}

The last line compiles into:

auth[data.child('parent_uuid')] != null

instead of

auth[data.child('parent_uuid').val()] != null