 higher. If PRINT-FRAME-SOURCE is :ALWAYS, it also reports “no
source available” for frames for which were compiled at lower debug settings.</p>
<p>METHOD-FRAME-STYLE (defaulting to <em>METHOD-FRAME-STYLE</em>), determines how frames
corresponding to method functions are printed. Possible values
are :MINIMAL, :NORMAL, and :FULL. See <em>METHOD-FRAME-STYLE</em> for more
information.</p>
<p>If EMERGENCY-BEST-EFFORT is true then try to print as much information as
possible while navigating and ignoring pos