rt-core/Error/stackTrace.html">stackTrace</a> getter.
An error object that merely implements <code>Error</code>, and doesn't extend it,
will not store the stack trace automatically.</p>
<p>Error objects are also used for system wide failures
like stack overflow or an out-of-memory situation.</p>
<p>Since errors are not created to be caught,
there is no need for subclasses to distinguish the errors.
Instead subclasses have been created in order to make groups
of related errors easy to create with consistent 