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Changes between Initial Version and Version 1 of Ticket #69, comment 1

initial	v1
1	1	The apparent reason for this is that trace_stack (ts) invokes trace_stack_, which invokes list_frame_args_. list_frame_args_ establishes an any_other condition handler, but doesn't invoke sc_signal_io_handler_ upon signal_io_ conditions. This, apparently, is required in order to not get into a recursive loop, eventually running off the end of the ring-4 stack and terminating the Initializer process.
	2
	3	When the code in an any_other or signal_io_ handler does any I/O to user_i/o, it will cause the recursive and fatal loop.
2	4
3	5	Simply adding an "on signal_io_ call sc_signal_io_handler_;" fixes the issue.