Range-deleting multiple paragraphs leads to corrupt state

[Discordius]

In CkEditor, create four paragraphs, like this:

1

2

3

4

Place the cursor before the '4'. Shift-select after the '1' to create a selection that includes paragraphs 2 and 3 and all of the paragraph-dividers. Press backslash. The result should be:

14

but instead it's

13

4

Now press Cmd+Z to undo what you just did. The result should have all four paragraphs, but instead it's

1

2

4

(paragraph 3 is missing)

📃 Other details

• Browser: Chrome
• OS: Mac OS
• CKEditor version: Latest (happens even on the example CKEDitor at https://ckeditor.com/docs/ckeditor5/latest/examples/builds/classic-editor.html)

Comments

As you can imagine, this is pretty bad. This is a pretty trivial way to end up in a state in which undo doesn't work, the devtools crash, and all kinds of weird stuff starts happening. So my guess is that fixing this is pretty high priority.

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[jodator]

Oh, it looks like we've fixed that right after a release: #8145.

I've checked master branch and nightly docs and the problem does not occur there. I'm closing this as a duplicate of #8145.

The fix should be available in the upcoming release.