4 Debugging Advice🔗ℹ

When a new program does not behave correctly, use the runtime hooks in "sick.rkt" instead of guessing.

Useful starting points are:

• SICK_DEBUG=1 to enable tracing,

• SICK_DEBUG_LINES=... to restrict the trace to a few labels,

• SICK_BREAK_LINES=... to stop before a line executes, and

• SICK_BREAK_REPEAT=N to stop when the same control-flow state repeats.

For example, to focus on the loop controller in "pit/triangular.i":

The same workflow scales to larger programs such as "pit/sort.i" or "pit/unlambda.i".