script crashes #24

For some reason all my php scripts who has r() or rt() crashes.
I see 2-3 r() outputs before crash, but no error messages, scripts just stops.
if I change r() function to just

function r(){
$args = func_get_args();
print_r($args);
return false;

everything works.

I dont know why I see no any errors, on local it works but on my server it crashes.
But, anyway, I should see error messages no?

It doesnt looks like javascript related because rt() giving same issue.
It can be momry leak, but I have my error handler and can see all critical issues.