Looking at the coverage data there are cases where we attempt to insert inferred link-annotations *before* the annotationLayer has rendered, see [here](2348365874/blob/web/annotation_layer_builder.js (L246)), which shouldn't happen and why that's treated as an Error.
This is most likely caused by the asynchronicity of all the relevant code, since the `Autolinker` functionality can only be invoked after both the annotationLayer *and* the textLayer have finished rendering.
Given that those operations are asynchronous, by the time that they complete it's possible that the annotationLayer (and also the textLayer) has been replaced by a new instance. In that case we might thus attempt to inject inferred link-annotations before the "new" annotationLayer has rendered.
To avoid this intermittent issue, we now ensure that the annotationLayer and textLayer haven't changed between those layers rendering and the `Autolinker` functionality being invoked. (If they did change, then a future `render` call will trigger the inferred link-annotations handling).
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