Salman Halim wrote:

> I'm getting this error in my Vim 9 script in Windows GVim 8.2.2912:
> 
> Error detected while compiling
> C:/vim/Vimfiles/plugin/Test.vim[17]..function TestBrokenCall:
> line    8:
> E1013: Argument 3: type mismatch, expected string but got bool
> 
> Here is a simple duplication script:
> 
> vim9script
> 
> export def g:BrokenCall( lineNumber: number, insertMode: bool,
> templateToUse: string = 'defaultValue' ): void
>   echo lineNumber
>   echo insertMode
>   echo templateToUse
> enddef
> 
> export def g:TestBrokenCall( line1: number, line2: number, templateName:
> string ): void
>   # This works
>   # call BrokenCall( line1, 0 )
> 
>   # This results in
>   # Error detected while compiling
> C:/vim/Vimfiles/plugin/Test.vim[17]..function TestBrokenCall:
>   # line    8:
>   # E1013: Argument 3: type mismatch, expected string but got bool
>   call BrokenCall( line1, 0, templateName )
> enddef
> 
> call TestBrokenCall(3, 5, 'ab')
> 
> Calling BrokenCall with just two arguments works, but passing in the third
> argument doesn't. The third argument can be a hard-coded string or the
> variable. Similarly, having BrokenCall contain a default value for the
> third parameter doesn't seem to matter, either.

I can reproduce it.  The "export" and "g:" are not needed.
The problem is that converting the number zero to a bool is done at the
wrong stack offset.  I'll make a patch.

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///                                                                      \\\
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