Ozaki Kiichi wrote:
> This is matchaddpos() problem.
>
> [repro steps]
>
> vim -Nu NONE
>
> i1234567890<Esc>
> :call matchaddpos('ErrorMsg', [[1, 1, 5], [1, 3, 5]])
>
> expected: colored 1~7 ("12345" and "34567"; pos [1, 1, 5] and [1, 3, 5],
> overlapped "345")
>
> actual: colored 1~5 ("12345"; only first pos [1, 1, 5])
>
> This problem occurs when overlapping more than 1 char.
> e.g. [[1, 1, 5], [1, 5, 5]] is no problem.
>
> [cause]
>
> https://github.com/vim/vim/blob/fd89d7e/src/screen.c#L7770-L7771
>
> On processing second pos [1, 3, 5], mincol is 5 (end of first pos col).
> Thus, col (== 3) is less then mincol, and second pos is skipped.
>
> I think that the case of "col < mincol < col + len -1" should be also
> processed.
>
> [patch]
>
> https://gist.github.com/ichizok/f34c9018f5e9e452d3bc78cc9026a720
Can you please add a test that fails without the patch?
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