Function scoped variables overwriting parent scope in v5.0.0-rc3

[Snor]

In this example, the $var assignment inside the function persists outside of the function:

{function name=test}
    {$var="b"}
{/function}

{$var="a"}

{test}

{$var}

So Smarty 4 would output "a" as you'd expect, but Smarty v5.0.0-rc3 outputs "b".