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        last CRAWL if ($errcr eq 'halt');
	@a=();
	@a = @DB::args if $hargs;	# must get local copy of args

	#
	# if the $error error string is newline terminated then it
	# is copied into $mess.  Otherwise, $mess gets set (at the end of
	# the 'else' section below) to one of two things.  The first time
	# through, it is set to the "$error at $file line $line" message.
	# $error is then set to 'called' which triggers subsequent loop
	# iterations to append $sub to $mess before appending the "$error
	# at $file line $line" which now actually reads "called at $file line
	# $line".  Thus, the stack trace message is constructed:
	#
	#        first time: $mess  = $error at $file line $line
	#  subsequent times: $mess .= $sub $error at $file line $line
	#                                  ^^^^^^
	#                                 "called"
	if ($error =~ m/\n$/) {
	  $mess .= $error;
	} else {