"Too many positionals passed" 在 NativeCall 子绑定中

"Too many positionals passed" in NativeCall sub binding

我有这个定义:

use NativeCall;

unit module kazmath;

class mat4 is repr('CStruct') {
    HAS num32 @.mat[16] is CArray;
}

sub kmMat4Fill( mat4 $mat, num32 @filler ) returns mat4 is native('kazmath')
                                            is export {*}

要绑定的函数是defined here:

kmMat4* kmMat4Fill(kmMat4* pOut, const kmScalar* pMat);

返回的错误是:

Too many positionals passed; expected 2 arguments but got 3

我真的想不通。

这是通过

修复的
sub kmMat4Fill( mat4 $mat, CArray[num32] $filler )
        returns mat4 is native('kazmath') is export {*}

在 NativeCall 中无法使用位置,但错误消息仍然是 LTA(Less Than Awesome)。