PHP-Parser/test/code/parser/stmt/function/variadicDefaultValue.test

Invalid variadic function
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<?php
function foo(...$foo = []) {}
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Variadic parameter cannot have a default value from 2:24 to 2:25
array(
    0: Stmt_Function(
        byRef: false
        name: foo
        params: array(
            0: Param(
                type: null
                byRef: false
                variadic: true
                name: foo
                default: Expr_Array(
                    items: array(
                    )
                )
            )
        )
        returnType: null
        stmts: array(
        )
    )
)