Relevant spec sections:

https://drafts.csswg.org/selectors-4/#the-dir-pseudo
https://html.spec.whatwg.org/multipage/semantics-other.html#selector-ltr

The interesting cases to test are from the definition of "directionality" in HTML:
https://html.spec.whatwg.org/multipage/dom.html#the-directionality

• element with dir="ltr" matches :dir(ltr)
• root element without dir attr

Important info

• URL to affected spec: https://w3c.github.io/payment-handler/
• ReSpec version: 26.0.0
• I did a "hard refresh", but it's still busted.

Description of problem

What happened (e.g., it crashed)?:

Validation error at line 5 in 1:
  Promise enableDelegations(sequence
          ^

Expected behavior (e.g., it shouldn't crash):

Validat

The "!" is shown in the section below:

`When Boolean is called with argument value, the following steps are taken:

Let b be ! ToBoolean(value).

If NewTarget is undefined, return b.

Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%BooleanPrototype%", « [[BooleanData]] »).

Set O.[[BooleanData]] to b.

Return O.`