Fix Trie tests

hypermodeinc · Nov 7, 2020 · 692e2d7 · 692e2d7
1 parent d76aae9
commit 692e2d7
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/xidmap/trie.go b/xidmap/trie.go
@@ -36,9 +36,11 @@ type Trie struct {
 func NewTrie() *Trie {
 	buf, err := z.NewBufferWith(32<<20, math.MaxUint32, z.UseMmap)
 	x.Check(err)
-	ro := buf.AllocateOffset(nodeSz)
+	// Add additional 8 bytes at the start, because offset=0 is used for checking non-existing node.
+	// Therefore we can't keep root at 0 offset.
+	ro := buf.AllocateOffset(nodeSz + 8)
 	return &Trie{
-		root: uint32(ro),
+		root: uint32(ro + 8),
 		buf:  buf,
 	}
 }