RAME.</p>
<p>:DEBUGGER-FRAME
specifies the currently debugged frame when inside the debugger, and
behaves as :INTERRUPTED-FRAME outside the debugger.</p>
<p>If PRINT-THREAD is true (default), backtrace is preceded by printing the
thread object the backtrace is from.</p>
<p>If PRINT-FRAME-SOURCE is true (default is false), each frame is followed by
printing the currently executing source form in the function responsible for
that frame, when available. Requires the function to have been compiled at
DEBUG 2 or