diff --git a/src/highlight.c b/src/highlight.c
index a71a100..d3ea2d2 100644
--- a/src/highlight.c
+++ b/src/highlight.c
@@ -3351,8 +3351,8 @@
 
     if (msg_col >= endcol)	// output at least one space
 	endcol = msg_col + 1;
-    if (Columns <= endcol)	// avoid hang for tiny window
-	endcol = Columns - 1;
+    if (Columns <= (long)endcol)	// avoid hang for tiny window
+	endcol = (int)(Columns - 1);
 
     msg_advance(endcol);
 
diff --git a/src/insexpand.c b/src/insexpand.c
index 4ad1f41..2be63a5 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -3618,16 +3618,21 @@
 	    }
 	}
 
-	fuzzy_indices_data = (int *)fuzzy_indices.ga_data;
-	qsort(fuzzy_indices_data, fuzzy_indices.ga_len, sizeof(int), compare_scores);
+	// prevent qsort from deref NULL pointer
+	if (fuzzy_indices.ga_len > 0)
+	{
+	    fuzzy_indices_data = (int *)fuzzy_indices.ga_data;
+	    qsort(fuzzy_indices_data, fuzzy_indices.ga_len, sizeof(int), compare_scores);
 
-	sorted_matches = (char_u **)alloc(sizeof(char_u *) * fuzzy_indices.ga_len);
-	for (i = 0; i < fuzzy_indices.ga_len; ++i)
-	    sorted_matches[i] = vim_strsave(matches[fuzzy_indices_data[i]]);
+	    sorted_matches = (char_u **)alloc(sizeof(char_u *) * fuzzy_indices.ga_len);
+	    for (i = 0; i < fuzzy_indices.ga_len; ++i)
+		sorted_matches[i] = vim_strsave(matches[fuzzy_indices_data[i]]);
 
-	FreeWild(num_matches, matches);
-	matches = sorted_matches;
-	num_matches = fuzzy_indices.ga_len;
+	    FreeWild(num_matches, matches);
+	    matches = sorted_matches;
+	    num_matches = fuzzy_indices.ga_len;
+	}
+
 	vim_free(compl_fuzzy_scores);
 	ga_clear(&fuzzy_indices);
     }
diff --git a/src/ops.c b/src/ops.c
index 2de2557..eb8f64c 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -240,8 +240,8 @@
 
     if (round)			// round off indent
     {
-	i = count / sw_val;	// number of 'shiftwidth' rounded down
-	j = count % sw_val;	// extra spaces
+	i = trim_to_int(count) / sw_val;	// number of 'shiftwidth' rounded down
+	j = trim_to_int(count) % sw_val;	// extra spaces
 	if (j && left)		// first remove extra spaces
 	    --amount;
 	if (left)
diff --git a/src/spellfile.c b/src/spellfile.c
index 51261ab..0b9536d 100644
--- a/src/spellfile.c
+++ b/src/spellfile.c
@@ -6434,7 +6434,13 @@
 		l = (int)STRLEN(buf);
 		vim_snprintf((char *)buf + l, MAXPATHL - l, "/spell");
 		if (filewritable(buf) != 2)
-		    vim_mkdir(buf, 0755);
+		{
+		    if (vim_mkdir(buf, 0755) != 0)
+		    {
+			vim_free(buf);
+			return;
+		    }
+		}
 
 		l = (int)STRLEN(buf);
 		vim_snprintf((char *)buf + l, MAXPATHL - l,
diff --git a/src/syntax.c b/src/syntax.c
index 48e7152..0212052 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -4084,8 +4084,8 @@
 
     if (msg_col >= endcol)	// output at least one space
 	endcol = msg_col + 1;
-    if (Columns <= endcol)	// avoid hang for tiny window
-	endcol = Columns - 1;
+    if (Columns <= (long)endcol)	// avoid hang for tiny window
+	endcol = (int)(Columns - 1);
 
     msg_advance(endcol);
     if (SYN_CLSTR(curwin->w_s)[id].scl_list != NULL)
diff --git a/src/version.c b/src/version.c
index e174c79..bd74573 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    608,
+/**/
     607,
 /**/
     606,