From 1eb99738b3bdadbe1955879b2c360025d8284a91 Mon Sep 17 00:00:00 2001
From: Kris Zyp <kriszyp@gmail.com>
Date: Tue, 6 Feb 2024 10:08:31 -0700
Subject: [PATCH] Do not attempt to finish/complete a cursor/txn twice for the
 same iterator

---
 package.json | 2 +-
 read.js      | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 8686b9301..49c954134 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "lmdb",
   "author": "Kris Zyp",
-  "version": "2.10.0-beta.2",
+  "version": "2.10.0-beta.3",
   "description": "Simple, efficient, scalable, high-performance LMDB interface",
   "license": "MIT",
   "repository": {
diff --git a/read.js b/read.js
index 19a84bca1..0dfafba3d 100644
--- a/read.js
+++ b/read.js
@@ -490,7 +490,7 @@ export function addReadMethods(LMDBStore, {
 				}
 
 				function finishCursor() {
-					if (txn.isDone)
+					if (!cursor || txn.isDone)
 						return;
 					if (iterable.onDone)
 						iterable.onDone()
@@ -511,6 +511,7 @@ export function addReadMethods(LMDBStore, {
 							db.cursorTxn = txn;
 						}
 					}
+					cursor = null;
 				}
 				return {
 					next() {
@@ -519,6 +520,9 @@ export function addReadMethods(LMDBStore, {
 							resetCursor();
 							keySize = position(0);
 						}
+						if (!cursor) {
+							return ITERATOR_DONE;
+						}
 						if (count === 0) { // && includeValues) // on first entry, get current value if we need to
 							keySize = position(options.offset);
 						} else