diff --git a/src/memline.c b/src/memline.c
index 80a870a0ed..ddaf6de58f 100644
--- a/src/memline.c
+++ b/src/memline.c
@@ -1329,6 +1329,7 @@ theend:
 	    mf_put(mfp, hp, FALSE, FALSE);
 	mf_close(mfp, FALSE);	    /* will also vim_free(mfp->mf_fname) */
     }
+    vim_free(buf->b_ml.ml_stack);
     vim_free(buf);
     if (serious_error && called_from_main)
 	ml_close(curbuf, TRUE);
diff --git a/src/version.c b/src/version.c
index 550137eb0b..f1095b691c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -666,6 +666,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    168,
 /**/
     167,
 /**/
diff --git a/src/window.c b/src/window.c
index 5f5bb2a094..ee9ef9c0c5 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4273,7 +4273,7 @@ win_alloc_lines(wp)
     win_T	*wp;
 {
     wp->w_lines_valid = 0;
-    wp->w_lines = (wline_T *)alloc((unsigned)(Rows * sizeof(wline_T)));
+    wp->w_lines = (wline_T *)alloc_clear((unsigned)(Rows * sizeof(wline_T)));
     if (wp->w_lines == NULL)
 	return FAIL;
     return OK;