jgraham: what happens if the assert fails in w3c/webdriver #1543/files#diff-eacf331f0ffc35d4b482f1d15a887d3bR3213 ?

AutomatedTester: The spec has a bug that should be reported. It's a precondition that's supposed to be enforced by the calling algorithm in the spec

It's not a requirement for an implementation to act in a specfic way

c.f. infra.spec.whatwg.org/#assertions

oh ok