TextNode instances created by OptimizerNodeVisitor have no SourceContext set and often the wrong template line which i need for a debugging extension. OPTIMIZE_RAW_FILTER can be turned off, but the print node optimization is always active. Also the check in the constructor currently doesn't include OPTIMIZE_RAW_FILTER and would throw an InvalidArgumentException if only that optimization should be enabled - this can be bypassed by adding something to the bitmask to force negative values though.