Yukihiro Nakadaira wrote:
> When assigning or deleting list item no error raised for out-of-range index.
>
> :let list = []
> :let list[0] = 0
> :echo list
> []
>
> :let list = []
> :unlet list[0]
>
> I expected "E684: list index out of range: 0" or similar error.
Indeed. Strange that nobody noticed the error message is missing.
> And slice assignment do nothing for empty slice.
>
> :let list = []
> :let list[0:9] = [1, 2]
> :echo list
> []
>
> :let list = [0]
> :let list[9:] = [1, 2]
> :echo list
> [0]
>
> :let list = []
> :let list[:] = [1, 2]
> :echo list
> []
>
> For non-empty slice, value is assigned and/or error is raised instead.
>
> :let list = [0]
> :let list[0:9] = [1, 2]
> E711: List value has not enough items
> :echo list
> [1, 2]
>
> :let list = [0]
> :let list[0:0] = [1, 2]
> E710: List value has more items than target
> :echo list
> [1]
>
> :let list = [0]
> :let list[:] = [1, 2]
> :echo list
> [1, 2]
I'm preparing a patch to fix this. Hopefully it doesn't go the other
way, giving an error message when it should not.
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