#0  c() called at [%s/debug_print_backtrace_limit.php:7]
#0  c() called at [%s/debug_print_backtrace_limit.php:7]
#1  b() called at [%s/debug_print_backtrace_limit.php:3]
#0  c() called at [%s/debug_print_backtrace_limit.php:7]
#1  b() called at [%s/debug_print_backtrace_limit.php:3]
#2  a() called at [%s/debug_print_backtrace_limit.php:17]
#0  c() called at [%s/debug_print_backtrace_limit.php:7]
#1  b() called at [%s/debug_print_backtrace_limit.php:3]
#2  a() called at [%s/debug_print_backtrace_limit.php:17]