-auto-all</literal> and running with <literal>+RTS -xc
-RTS</literal> will tell you exactly the call stack at the
point the error was raised.</para>
+
+ <para>The output contains one line for each exception raised
+ in the program (the program might raise and catch several
+ exceptions during its execution), where each line is of the
+ form:</para>
+
+<screen>
+< cc<subscript>1</subscript>, ..., cc<subscript>n</subscript> >
+</screen>
+ <para>each <literal>cc</literal><subscript>i</subscript> is
+ a cost centre in the program (see <xref
+ linkend="cost-centres">), and the sequence represents the
+ “call stack” at the point the exception was
+ raised. The leftmost item is the innermost function in the
+ call stack, and the rightmost item is the outermost
+ function.</para>
+
</listitem>
</varlistentry>