eth, trie: fix tracer GC which accidentally pruned the metaroot

2018-08-08 17:16:38 +03:00
parent 8051a0768a
commit 11bbc66082
2 changed files with 11 additions and 2 deletions
--- a/trie/database.go
+++ b/trie/database.go
@ -431,6 +431,11 @@ func (db *Database) reference(child common.Hash, parent common.Hash) {

 // Dereference removes an existing reference from a root node.
 func (db *Database) Dereference(root common.Hash) {
+	// Sanity check to ensure that the meta-root is not removed
+	if root == (common.Hash{}) {
+		log.Error("Attempted to dereference the trie cache meta root")
+		return
+	}
 	db.lock.Lock()
 	defer db.lock.Unlock()