Broken undo?

Hi there,

I found the following, open vim and do the following:

- Insert 1 and exit insert mode.
- Append 2 and then <C-R>=setline('.', '123')<CR> to add one char to the right of the cursor.
- Without leaving insert mode, type other <CR> and the number 4, now exit insert mode.
- Press u.

I should expect to have just the number 1 in the window, but I'm left with two lines:

1
43

If I undo again, I get the original empty window.

If I start in the second step, I can't undo to the empty window, I'm left with two lines but I can exit vim as if the buffer was in its original state.

Is that the expected behaviour or there is something wrong? why does the setline() call + <CR> affects the first edit?

Thanks!
Israel

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