diff --git a/src/cmd/tbl/t6.c b/src/cmd/tbl/t6.c
index a78368f..463bfa1 100644
--- a/src/cmd/tbl/t6.c
+++ b/src/cmd/tbl/t6.c
@@ -9,8 +9,8 @@
 void
 maktab(void)			/* define the tab stops of the table */
 {
-	int	icol, ilin, tsep, k, ik, vforml, il, text;
-	char	*s;
+	int	icol, ilin, tsep, k, ik, vforml, il, s, text;
+	char	*ss;
 
 	for (icol = 0; icol < ncol; icol++) {
 		doubled[icol] = acase[icol] = 0;
@@ -34,14 +34,15 @@
 				switch (ctype(vforml, icol)) {
 				case 'a':
 					acase[icol] = 1;
-					s = table[ilin][icol].col;
-					if ((int)s > 0 && (int)s < 128 && text) {
+					ss = table[ilin][icol].col;
+					s = (int)(uintptr)ss;
+					if (s > 0 && s < 128 && text) {
 						if (doubled[icol] == 0)
 							Bprint(&tabout, ".nr %d 0\n.nr %d 0\n",
 							    S1, S2);
 						doubled[icol] = 1;
 						Bprint(&tabout, ".if \\n(%c->\\n(%d .nr %d \\n(%c-\n",
-						    (int)s, S2, S2, (int)s);
+						    s, S2, S2, s);
 					}
 				case 'n':
 					if (table[ilin][icol].rcol != 0) {
@@ -49,18 +50,19 @@
 							Bprint(&tabout, ".nr %d 0\n.nr %d 0\n",
 							    S1, S2);
 						doubled[icol] = 1;
-						if (real(s = table[ilin][icol].col) && !vspen(s)) {
-							if (tx((int)s) != text) 
+						if (real(ss = table[ilin][icol].col) && !vspen(ss)) {
+							s = (int)(uintptr)ss;
+							if (tx(s) != text) 
 								continue;
 							Bprint(&tabout, ".nr %d ", TMP);
-							wide(s, FN(vforml, icol), SZ(vforml, icol)); 
+							wide(ss, FN(vforml, icol), SZ(vforml, icol)); 
 							Bprint(&tabout, "\n");
 							Bprint(&tabout, ".if \\n(%d<\\n(%d .nr %d \\n(%d\n",
 							    S1, TMP, S1, TMP);
 						}
-						if (text == 0 && real(s = table[ilin][icol].rcol) && !vspen(s) && !barent(s)) {
+						if (text == 0 && real(ss = table[ilin][icol].rcol) && !vspen(ss) && !barent(ss)) {
 							Bprint(&tabout, ".nr %d \\w%c%s%c\n",
-							    TMP, F1, s, F1);
+							    TMP, F1, ss, F1);
 							Bprint(&tabout, ".if \\n(%d<\\n(%d .nr %d \\n(%d\n", S2, TMP, S2,
 							     TMP);
 						}
@@ -69,11 +71,12 @@
 				case 'r':
 				case 'c':
 				case 'l':
-					if (real(s = table[ilin][icol].col) && !vspen(s)) {
-						if (tx((int)s) != text) 
+					if (real(ss = table[ilin][icol].col) && !vspen(ss)) {
+						s = (int)(uintptr)ss;
+						if (tx(s) != text) 
 							continue;
 						Bprint(&tabout, ".nr %d ", TMP);
-						wide(s, FN(vforml, icol), SZ(vforml, icol)); 
+						wide(ss, FN(vforml, icol), SZ(vforml, icol)); 
 						Bprint(&tabout, "\n");
 						Bprint(&tabout, ".if \\n(%2s<\\n(%d .nr %2s \\n(%d\n",
 						     reg(icol, CRIGHT), TMP, reg(icol, CRIGHT), TMP);
@@ -100,8 +103,8 @@
 		}
 		for (ilin = 0; ilin < nlin; ilin++)
 			if (k = lspan(ilin, icol)) {
-				s = table[ilin][icol-k].col;
-				if (!real(s) || barent(s) || vspen(s) ) 
+				ss = table[ilin][icol-k].col;
+				if (!real(ss) || barent(ss) || vspen(ss) ) 
 					continue;
 				Bprint(&tabout, ".nr %d ", TMP);
 				wide(table[ilin][icol-k].col, FN(ilin, icol - k), SZ(ilin, icol - k));
@@ -210,7 +213,7 @@
 			putsize("0");
 		Bprint(&tabout, "%c", F1);
 	} else
-		Bprint(&tabout, "\\n(%c-", (int)s);
+		Bprint(&tabout, "\\n(%c-", (int)(uintptr)s);
 }
 
 
diff --git a/src/cmd/tbl/t8.c b/src/cmd/tbl/t8.c
index 92277e2..bfa21ec 100644
--- a/src/cmd/tbl/t8.c
+++ b/src/cmd/tbl/t8.c
@@ -9,9 +9,9 @@
 				/* i is line number for deciding format */
 				/* nl is line number for finding data   usually identical */
 {
-	int	c, lf, ct, form, lwid, vspf, ip, cmidx, exvspen, vforml;
+	int	c, s, lf, ct, form, lwid, vspf, ip, cmidx, exvspen, vforml;
 	int	vct, chfont, uphalf;
-	char	*s, *size, *fn, *rct;
+	char	*ss, *size, *fn, *rct;
 
 	cmidx = watchout = vspf = exvspen = 0;
 	if (i == 0) 
@@ -20,20 +20,22 @@
 		fullwide(0,   dboxflg ? '=' : '-');
 	if (instead[nl] == 0 && fullbot[nl] == 0)
 		for (c = 0; c < ncol; c++) {
-			s = table[nl][c].col;
-			if (s == 0) 
+			ss = table[nl][c].col;
+			if (ss == 0) 
 				continue;
-			if (vspen(s)) {
+			if (vspen(ss)) {
 				for (ip = nl; ip < nlin; ip = next(ip))
-					if (!vspen(s = table[ip][c].col)) 
+					if (!vspen(ss = table[ip][c].col)) 
 						break;
-				if ((int)s > 0 && (int)s < 128)
+				s = (int)(uintptr)ss;
+				if (s > 0 && s < 128)
 					Bprint(&tabout, ".ne \\n(%c|u+\\n(.Vu\n", (int)s);
 				continue;
 			}
-			if (point(s)) 
+			if (point(ss)) 
 				continue;
-			Bprint(&tabout, ".ne \\n(%c|u+\\n(.Vu\n", (int)s);
+			s = (int)(uintptr)ss;
+			Bprint(&tabout, ".ne \\n(%c|u+\\n(.Vu\n", s);
 			watchout = 1;
 		}
 	if (linestop[nl])
@@ -66,17 +68,19 @@
 	vspf = 0;
 	chfont = 0;
 	for (c = 0; c < ncol; c++) {
-		s = table[nl][c].col;
-		if (s == 0) 
+		ss = table[nl][c].col;
+		if (ss == 0) 
 			continue;
-		chfont |= (int)(font[c][stynum[nl]]);
-		if (point(s) ) 
+		if(font[c][stynum[nl]])
+			chfont = 1;
+		if (point(ss) )
 			continue;
+		s = (int)(uintptr)ss;
 		lf = prev(nl);
 		if (lf >= 0 && vspen(table[lf][c].col))
 			Bprint(&tabout,
 			   ".if (\\n(%c|+\\n(^%c-1v)>\\n(#- .nr #- +(\\n(%c|+\\n(^%c-\\n(#--1v)\n",
-			    (int)s, 'a' + c, (int)s, 'a' + c);
+			    s, 'a' + c, s, 'a' + c);
 		else
 			Bprint(&tabout,
 			    ".if (\\n(%c|+\\n(#^-1v)>\\n(#- .nr #- +(\\n(%c|+\\n(#^-\\n(#--1v)\n",
@@ -117,7 +121,7 @@
 				rct = reg(c, CMID);
 			Bprint(&tabout, "\\h'|\\n(%2su'", rct);
 		}
-		s = table[nl][c].col;
+		ss = table[nl][c].col;
 		fn = font[c][stynum[vforml]];
 		size = csize[c][stynum[vforml]];
 		if (*size == 0)
@@ -150,12 +154,12 @@
 					Bprint(&tabout, "%c%c", F1, F2);
 					if (uphalf) 
 						Bprint(&tabout, "\\u");
-					puttext(s, fn, size);
+					puttext(ss, fn, size);
 					if (uphalf) 
 						Bprint(&tabout, "\\d");
 					Bprint(&tabout, "%c", F1);
 				}
-				s = table[nl][c].rcol;
+				ss = table[nl][c].rcol;
 				form = 1;
 				break;
 			}
@@ -179,12 +183,12 @@
 		}
 		if (realsplit ? rused[c] : used[c]) /*Zero field width*/ {
 			/* form: 1 left, 2 right, 3 center adjust */
-			if (ifline(s)) {
-				makeline(i, c, ifline(s));
+			if (ifline(ss)) {
+				makeline(i, c, ifline(ss));
 				continue;
 			}
-			if (filler(s)) {
-				Bprint(&tabout, "\\l'|\\n(%2su\\&%s'", reg(c, CRIGHT), s + 2);
+			if (filler(ss)) {
+				Bprint(&tabout, "\\l'|\\n(%2su\\&%s'", reg(c, CRIGHT), ss + 2);
 				continue;
 			}
 			ip = prev(nl);
@@ -204,13 +208,13 @@
 			Bprint(&tabout, "%c", F1);
 			if (form != 1)
 				Bprint(&tabout, "%c", F2);
-			if (vspen(s))
+			if (vspen(ss))
 				vspf = 1;
 			else
 			 {
 				if (uphalf) 
 					Bprint(&tabout, "\\u");
-				puttext(s, fn, size);
+				puttext(ss, fn, size);
 				if (uphalf) 
 					Bprint(&tabout, "\\d");
 			}
@@ -289,7 +293,7 @@
 			continue;
 		if (ss == 0) 
 			continue;
-		s = (int)ss;
+		s = (int)(uintptr)ss;
 		Bprint(&tabout, ".sp |\\n(##u-1v\n");
 		Bprint(&tabout, ".nr %d ", SIND);
 		ct = 0;
diff --git a/src/cmd/tbl/tc.c b/src/cmd/tbl/tc.c
index 6323c26..a89fc0f 100644
--- a/src/cmd/tbl/tc.c
+++ b/src/cmd/tbl/tc.c
@@ -5,7 +5,7 @@
 choochar(void)
 {
 				/* choose funny characters to delimit fields */
-	int	had[128], ilin, icol, k;
+	int	had[256], ilin, icol, k;
 	char	*s;
 
 	for (icol = 0; icol < 128; icol++)
@@ -56,10 +56,10 @@
 
 
 int
-point(char *s)
+point(char *ss)
 {
-	int	ss = (int)s;
-	return(ss >= 128 || ss < 0);
+	int	s = (int)(uintptr)ss;
+	return(s >= 128 || s < 0);
 }
 
 
diff --git a/src/cmd/tbl/tg.c b/src/cmd/tbl/tg.c
index 6abb149..3afc88c 100644
--- a/src/cmd/tbl/tg.c
+++ b/src/cmd/tbl/tg.c
@@ -6,9 +6,10 @@
 {
 					/* get a section of text */
 	char	line[4096];
-	int	oname;
+	int	oname, startline;
 	char	*vs;
 
+	startline = iline;
 	if (texname == 0) 
 		error("Too many text block diversions");
 	if (textflg == 0) {
@@ -42,7 +43,11 @@
 	if (ctype(ilin, icol) == 'a')
 		Bprint(&tabout, ".ll -2n\n");
 	Bprint(&tabout, ".in 0\n");
-	while (gets1(line, sizeof(line))) {
+	for (;;) {
+		if (gets1(line, sizeof(line)) == nil) {
+			iline = startline;
+			error("missing closing T}");
+		}
 		if (line[0] == 'T' && line[1] == '}' && line[2] == tab) 
 			break;
 		if (match("T}", line)) 
diff --git a/src/cmd/tbl/tm.c b/src/cmd/tbl/tm.c
index 8fa4e49..5b58f0d 100644
--- a/src/cmd/tbl/tm.c
+++ b/src/cmd/tbl/tm.c
@@ -5,8 +5,8 @@
 maknew(char *str)
 {
 				/* make two numerical fields */
-	int	dpoint, c;
-	char	*p, *q, *ba;
+	int	c;
+	char	*p, *q, *ba, *dpoint;
 
 	p = str;
 	for (ba = 0; c = *str; str++)
@@ -18,7 +18,7 @@
 			if (*str == '.' && !ineqn(str, p) && 
 			    (str > p && digit(*(str - 1)) || 
 			    digit(*(str + 1))))
-				dpoint = (int)str;
+				dpoint = str;
 		}
 		if (dpoint == 0)
 			for (; str > p; str--) {
@@ -28,7 +28,7 @@
 		if (!dpoint && p == str) /* not numerical, don't split */
 			return(0);
 		if (dpoint) 
-			str = (char *)dpoint;
+			str = dpoint;
 	} else
 		str = ba;
 	p = str;