gray">g1</em>
&gt; (procedure-source g1) ; you can add trace-in explicitly (rather than call trace)
<em class="gray">(lambda (x) (trace-in (curlet)) (+ x 1))</em>
&gt; (g1 2)
<em class="gray">(g1 2)</em>         ; file/line info is included if relevant
<em class="gray">  -> 3
3</em>
&gt; (break g1)
<em class="gray">g1</em>
&gt; (g1 3)
<em class="gray">break: (g1 3), C-q to exit break
break&gt; x</em>       ; this is a repl started at the breakpoint
<em class="gray">3</em>
break&gt;  -> 4   ; C-q typed to ex