===================================================================
RCS file: /cvs/mandoc/out.c,v
retrieving revision 1.77
retrieving revision 1.80
diff -u -p -r1.77 -r1.80
--- mandoc/out.c	2018/12/13 11:55:47	1.77
+++ mandoc/out.c	2021/08/10 12:55:03	1.80
@@ -1,4 +1,4 @@
-/*	$Id: out.c,v 1.77 2018/12/13 11:55:47 schwarze Exp $ */
+/*	$Id: out.c,v 1.80 2021/08/10 12:55:03 schwarze Exp $ */
 /*
  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2011,2014,2015,2017,2018 Ingo Schwarze <schwarze@openbsd.org>
@@ -22,11 +22,13 @@
 #include <assert.h>
 #include <ctype.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 
 #include "mandoc_aux.h"
+#include "mandoc.h"
 #include "tbl.h"
 #include "out.h"
 
@@ -149,7 +151,7 @@ tblcalc(struct rofftbl *tbl, const struct tbl_span *sp
 		gp = &first_group;
 		for (dp = sp->first; dp != NULL; dp = dp->next) {
 			icol = dp->layout->col;
-			while (icol > maxcol)
+			while (maxcol < icol + dp->hspans)
 				tbl->cols[++maxcol].spacing = SIZE_MAX;
 			col = tbl->cols + icol;
 			col->flags |= dp->layout->flags;
@@ -209,13 +211,25 @@ tblcalc(struct rofftbl *tbl, const struct tbl_span *sp
 	}
 
 	/*
-	 * Column spacings are needed for span width calculations,
-	 * so set the default values now.
+	 * The minimum width of columns explicitly specified
+	 * in the layout is 1n.
 	 */
 
-	for (icol = 0; icol <= maxcol; icol++)
-		if (tbl->cols[icol].spacing == SIZE_MAX || icol == maxcol)
-			tbl->cols[icol].spacing = 3;
+	if (maxcol < sp_first->opts->cols - 1)
+		maxcol = sp_first->opts->cols - 1;
+	for (icol = 0; icol <= maxcol; icol++) {
+		col = tbl->cols + icol;
+		if (col->width < 1)
+			col->width = 1;
+
+		/*
+		 * Column spacings are needed for span width
+		 * calculations, so set the default values now.
+		 */
+
+		if (col->spacing == SIZE_MAX || icol == maxcol)
+			col->spacing = 3;
+	}
 
 	/*
 	 * Replace the minimum widths with the missing widths,