apparmor_parser 2.5 doesn't close file descriptors

My apache profile consists over 1335 #include directives. Unfortunately parser fails with mystic message with these:

AppArmor parser error in /etc/apparmor.d/usr.sbin.httpd.prefork at line 93616: Could not open '(null)'

It turns out that the problem is with not closing of file descriptors, likely opened for #include directive. strace confirms that:

3865 open("/etc/apparmor.d/abstractions/base", O_RDONLY) = -1 EMFILE (Too many open files)

while the limit was 1024.

parser should open and close policy files after using them.