Undoing change to atomic annotations throws

[fraziermork]

Do you want to request a feature or report a bug?

bug

What's the current behavior?

Not including a jsfiddle because the search highlighting example is sufficient to repro the bug. In the gif, I delete a character in an atomic annotation so that slate cleans it up, then undo that edit. It throws an error somewhere in applyOperation/removeAnnotation.

Not sure if this is related to the whole editor.withoutSaving thing

What's the expected behavior?

not to throw

[ianstormtaylor]

As of #3093 (which was just merged), I believe this issue is no longer applicable, because a lot has changed. I'm going through and closing out any potential issues that are not out of date with the overhaul. Thanks for understanding.