===================================================================
RCS file: /cvs/mandoc/roff.7,v
retrieving revision 1.15
retrieving revision 1.16
diff -u -p -r1.15 -r1.16
--- mandoc/roff.7	2010/12/06 16:37:32	1.15
+++ mandoc/roff.7	2010/12/10 20:58:56	1.16
@@ -1,4 +1,4 @@
-.\"	$Id: roff.7,v 1.15 2010/12/06 16:37:32 kristaps Exp $
+.\"	$Id: roff.7,v 1.16 2010/12/10 20:58:56 schwarze Exp $
 .\"
 .\" Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: December 6 2010 $
+.Dd $Mdocdate: December 10 2010 $
 .Dt ROFF 7
 .Os
 .Sh NAME
@@ -196,6 +196,12 @@ string interpolation syntax described below
 .Sx ds ,
 but this is rarely useful because every macro definition contains at least
 one explicit newline character.
+.Pp
+In order to prevent endless recursion, both groff and
+.Xr mandoc 1
+limit the stack depth for expanding macros and strings
+to a large, but finite number.
+Do not rely on the exact value of this limit.
 .Ss \&dei
 Define a user-defined
 .Nm