Fix the obsolete .Db (toggle debug mode) macro to ignore its arguments

and not trigger an assertion when there is more than one argument;
the latter found by jsg@ with afl.

5 files changed, 34 insertions, 2 deletions

diff --git a/regress/usr.bin/mandoc/mdoc/Db/Makefile b/regress/usr.bin/mandoc/mdoc/Db/Makefile
new file mode 100644
index 00000000000..c37822ff284
--- /dev/null
+++ b/regress/usr.bin/mandoc/mdoc/Db/Makefile
@@ -0,0 +1,6 @@
+# $OpenBSD: Makefile,v 1.1 2014/11/27 16:20:27 schwarze Exp $
+
+REGRESS_TARGETS	= args
+LINT_TARGETS	= args
+
+.include <bsd.regress.mk>
diff --git a/regress/usr.bin/mandoc/mdoc/Db/args.in b/regress/usr.bin/mandoc/mdoc/Db/args.in
new file mode 100644
index 00000000000..b40d7b0c20c
--- /dev/null
+++ b/regress/usr.bin/mandoc/mdoc/Db/args.in
@@ -0,0 +1,14 @@
+.Dd November 27, 2014
+.Dt DB-ARGS 1
+.Os OpenBSD
+.Sh NAME
+.Nm Db-args
+.Nd obsolete debug macro
+.Sh DESCRIPTION
+no args
+.Db
+one arg
+.Db on
+two args
+.Db foo bar
+end of text
diff --git a/regress/usr.bin/mandoc/mdoc/Db/args.out_ascii b/regress/usr.bin/mandoc/mdoc/Db/args.out_ascii
new file mode 100644
index 00000000000..909b91ba18e
--- /dev/null
+++ b/regress/usr.bin/mandoc/mdoc/Db/args.out_ascii
@@ -0,0 +1,9 @@
+DB-ARGS(1)                  General Commands Manual                 DB-ARGS(1)
+
+NNAAMMEE
+     DDbb--aarrggss - obsolete debug macro
+
+DDEESSCCRRIIPPTTIIOONN
+     no args one arg two args end of text
+
+OpenBSD                        November 27, 2014                       OpenBSD
diff --git a/regress/usr.bin/mandoc/mdoc/Db/args.out_lint b/regress/usr.bin/mandoc/mdoc/Db/args.out_lint
new file mode 100644
index 00000000000..e0eb44aebe4
--- /dev/null
+++ b/regress/usr.bin/mandoc/mdoc/Db/args.out_lint
@@ -0,0 +1,3 @@
+mandoc: args.in:9:2: WARNING: obsolete macro: Db
+mandoc: args.in:11:2: WARNING: obsolete macro: Db
+mandoc: args.in:13:2: WARNING: obsolete macro: Db
diff --git a/regress/usr.bin/mandoc/mdoc/Makefile b/regress/usr.bin/mandoc/mdoc/Makefile
index d918d28bb5c..6006c7da574 100644
--- a/regress/usr.bin/mandoc/mdoc/Makefile
+++ b/regress/usr.bin/mandoc/mdoc/Makefile
@@ -1,7 +1,7 @@
-# $OpenBSD: Makefile,v 1.29 2014/08/14 02:00:52 schwarze Exp $
+# $OpenBSD: Makefile,v 1.30 2014/11/27 16:20:27 schwarze Exp $
 
 SUBDIR  = Ad An Ap Aq Ar At Bd Bf Bk Bl Brq Bx Cd Cm
-SUBDIR += D1 Dd Dl Dq Dt Dv Em Eo Er Ev Ex Fd Fl Fo Ft Ic In Lb Li Lk
+SUBDIR += D1 Db Dd Dl Dq Dt Dv Em Eo Er Ev Ex Fd Fl Fo Ft Ic In Lb Li Lk
 SUBDIR += Ms Mt Nd Nm No Ns Oo Op Os Ox Pa Pf Pp Qq Rs Rv
 SUBDIR += Sh Sm Sq St Sx Sy Tn Ux Va Vt Xr blank