troff: line nr req .nm 1 causes div by 0 on .evc

Fixes issue #75
n-t-roff · Sep 3, 2018 · 0ac091c · 0ac091c
1 parent a1db1a2
commit 0ac091c
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Showing 2 changed files with 3 additions and 3 deletions.
diff --git a/troff/n5.c b/troff/n5.c
@@ -1383,8 +1383,8 @@ evc(struct env *dp, struct env *sp)
 	if (dp->_brpnl < INT_MAX)
 		dp->_brpnl = 0;
 	dp->_nn = 0;
-	dp->_ndf = 0;
-	dp->_nms = 0;
+	dp->_ndf = 1;
+	dp->_nms = 1;
 	dp->_ni = 0;
 	dp->_ul = 0;
 	dp->_cu = 0;

diff --git a/troff/n7.c b/troff/n7.c
@@ -292,7 +292,7 @@ donum(void)
 		nn--;
 		goto d1;
 	}
-	if (numtab[LN].val % ndf) {
+	if (numtab[LN].val % (ndf < 1 ? 1 : ndf)) {
 		numtab[LN].val++;
 d1:
 		un += nw * (3 + nms + ni);