Checks that error preview does not run user code

Running test: ErrorStack
{
    stackCalled : false
    stackCalledOnBase : false
    stackCalledOnProxy : false
}

Running test: ErrorStackBoundBuiltin
{
    stackCalledViaBoundApply : false
    stackCalledViaBoundCall : false
}

Running test: ErrorStackProxy
{
    stackCalledViaProxy : false
}

Running test: ErrorDescriptionProxy
{
    messageCalled : false
    nameCalled : false
    stackCalled : false
}