rb_backtrace_to_str_ary 834 error.c obj = rb_backtrace_to_str_ary(obj); rb_backtrace_to_str_ary 80 eval_error.c bt = rb_backtrace_to_str_ary(bt); rb_backtrace_to_str_ary 1509 internal.h VALUE rb_backtrace_to_str_ary(VALUE obj); rb_backtrace_to_str_ary 646 vm_backtrace.c VALUE str = rb_backtrace_to_str_ary(self);