BACKTRACE_SKIP     49 src/simh/backtrace_func.c #   define BACKTRACE_SKIP 1
BACKTRACE_SKIP     50 src/simh/backtrace_main.c #    define BACKTRACE_SKIP 1
BACKTRACE_SKIP   1542 src/simh/scp.c # define BACKTRACE_SKIP 1