--TEST--
Test ob_get_flush() function : error conditions
--INI--
output_buffering=0
--FILE--
<?php
echo "*** Testing ob_get_flush() : error conditions ***\n";

// No ob_start() executed
var_dump( ob_get_flush() );

?>
--EXPECTF--
*** Testing ob_get_flush() : error conditions ***

Notice: ob_get_flush(): Failed to delete and flush buffer. No buffer to delete or flush in %s on line %d
bool(false)