ious debugging aids, including trace, break, watch, and a C-style stacktrace.
The *s7* field 'debug controls when these are active, and to what extent.
</p>

<p>(<em class="emdef">trace</em> func) adds a tracepoint to the start of the function or macro func.
(trace) adds such tracing to every subsequently defined function or macro.
(<em class="emdef">untrace</em>) turns off tracing; (untrace func) turns off tracing in func.
Similarly (<em class="emdef">break</em> func) places a breakpoint at the start of fu