Tyru wrote:

> Calling a vimscript function which has duplicated argument causes
> internal error.
> 
> ----- test.vim -----
> function! s:foo(a, a)
> endfunction
> call s:foo(1, 2)
> ----- test.vim end -----
> 
> $ vim -u NONE -i NONE -S test.vim
> will output "E685: Internal error: hash_add()".
> 
> Attached patch fixed it to output general error message to command-line
> like "E853: Duplicated argument variables: {variable name}" ,
> when declaring function. (not when calling function)

Thanks, I'll put it in the todo list.

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