Do not dereference a NULL pointer if a .Bl macro has

no -type, -width, -offset or -compact arguments whatsoever;
this got broken in mdoc_validate.c rev. 1.156.
While here, sort headers.

3 files changed, 20 insertions, 5 deletions

diff --git a/regress/usr.bin/mandoc/mdoc/Bl/notype.in b/regress/usr.bin/mandoc/mdoc/Bl/notype.in
index d28a5b0d82f..dce46bf80ba 100644
--- a/regress/usr.bin/mandoc/mdoc/Bl/notype.in
+++ b/regress/usr.bin/mandoc/mdoc/Bl/notype.in
@@ -5,14 +5,22 @@
 .Nm Bl-notype
 .Nd lists with late or missing types
 .Sh DESCRIPTION
-initial text
+late type:
 .Bl -offset indent -bullet
 .It
 Some text.
 .El tail argument
-middle text
+.Pp
+no type:
 .Bl -offset indent
 .It
 Some text.
 .El
+.Pp
+no argument at all:
+.Bl
+.It
+Some text.
+.El
+.Pp
 final text
diff --git a/regress/usr.bin/mandoc/mdoc/Bl/notype.out_ascii b/regress/usr.bin/mandoc/mdoc/Bl/notype.out_ascii
index 02a9960338a..2bb4d069f56 100644
--- a/regress/usr.bin/mandoc/mdoc/Bl/notype.out_ascii
+++ b/regress/usr.bin/mandoc/mdoc/Bl/notype.out_ascii
@@ -4,12 +4,18 @@ NNAAMMEE
      BBll--nnoottyyppee - lists with late or missing types
 
 DDEESSCCRRIIPPTTIIOONN
-     initial text
+     late type:
 
            oo   Some text.
-     middle text
+
+     no type:
 
            Some text.
+
+     no argument at all:
+
+     Some text.
+
      final text
 
 OpenBSD                          July 4, 2014                          OpenBSD
diff --git a/regress/usr.bin/mandoc/mdoc/Bl/notype.out_lint b/regress/usr.bin/mandoc/mdoc/Bl/notype.out_lint
index ec90ae56602..c14bd0b46be 100644
--- a/regress/usr.bin/mandoc/mdoc/Bl/notype.out_lint
+++ b/regress/usr.bin/mandoc/mdoc/Bl/notype.out_lint
@@ -1,3 +1,4 @@
 mandoc: notype.in:9:2: WARNING: list type is not the first argument: Bl -offset
 mandoc: notype.in:12:2: ERROR: skipping all arguments: El tail argument
-mandoc: notype.in:14:2: ERROR: missing list type, using -item: Bl
+mandoc: notype.in:15:2: ERROR: missing list type, using -item: Bl
+mandoc: notype.in:21:2: ERROR: missing list type, using -item: Bl