From 5f7058a49a30aa6a19941294599c83e2553a2bec Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Fri, 27 Mar 2020 11:56:16 +0300
Subject: [PATCH 01/25] Cirrus CI: upgrade to FreeBSD 12.1 (#712)

---
 .cirrus.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.cirrus.yml b/.cirrus.yml
index 89acf288..addd6c5f 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -1,5 +1,5 @@
 freebsd_instance:
-  image_family: freebsd-12-0
+  image_family: freebsd-12-1
 
 task:
   name: FreeBSD

From 91711fa61d3e3666633a554c3ce59407c3b1c7dc Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Fri, 27 Mar 2020 09:18:22 +0000
Subject: [PATCH 02/25] Bump node-gyp-build from 4.1.1 to 4.2.1 (#708)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 9b0b6465..e1c37dfd 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "dependencies": {
     "abstract-leveldown": "~6.2.1",
     "napi-macros": "~2.0.0",
-    "node-gyp-build": "~4.1.0"
+    "node-gyp-build": "~4.2.1"
   },
   "devDependencies": {
     "async-each": "^1.0.3",

From 9da129cb485a4f77cb3f3496d7331eb59db12d84 Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Fri, 23 Oct 2020 08:25:08 +0200
Subject: [PATCH 03/25] Bump prebuildify-cross from v4.0.0 to 4.0.0 (#741)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index e1c37dfd..bf60d838 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "nyc": "^15.0.0",
     "prebuildify": "^3.0.0",
     "prebuildify-ci": "^1.0.4",
-    "prebuildify-cross": "github:prebuild/prebuildify-cross#v4.0.0",
+    "prebuildify-cross": "^4.0.0",
     "readfiletree": "^1.0.0",
     "rimraf": "^3.0.0",
     "standard": "^14.0.0",

From 2fb5ff2080f0d9d26377d1614448e752ffb585ba Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Sat, 24 Oct 2020 07:24:46 +0000
Subject: [PATCH 04/25] Bump prebuildify from 3.0.4 to 4.1.0 (#738)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index bf60d838..cc453659 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "mkfiletree": "^2.0.0",
     "node-gyp": "^6.0.0",
     "nyc": "^15.0.0",
-    "prebuildify": "^3.0.0",
+    "prebuildify": "^4.1.0",
     "prebuildify-ci": "^1.0.4",
     "prebuildify-cross": "^4.0.0",
     "readfiletree": "^1.0.0",

From fe54e731e66dca407c7d5fa09166ce34e14ce17d Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Sat, 24 Oct 2020 07:26:32 +0000
Subject: [PATCH 05/25] Bump electron from 8.5.2 to 10.1.5 (#746)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index cc453659..97ed7d92 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "delayed": "^2.0.0",
     "dependency-check": "^4.1.0",
     "du": "^1.0.0",
-    "electron": "^8.0.0",
+    "electron": "^10.1.5",
     "faucet": "^0.0.1",
     "glob": "^7.1.3",
     "hallmark": "^2.0.0",

From d39e232d0bf71f2eeaa10b9e9cf254206f529241 Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Sat, 24 Oct 2020 08:17:55 +0000
Subject: [PATCH 06/25] Bump standard from 14.3.4 to 15.0.0 (#745)

---
 package.json              |  2 +-
 test/leak-tester-batch.js | 30 +++++++++++++++---------------
 2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/package.json b/package.json
index 97ed7d92..1a8d86a3 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "prebuildify-cross": "^4.0.0",
     "readfiletree": "^1.0.0",
     "rimraf": "^3.0.0",
-    "standard": "^14.0.0",
+    "standard": "^15.0.0",
     "tape": "^4.10.0",
     "tempy": "^0.3.0"
   },
diff --git a/test/leak-tester-batch.js b/test/leak-tester-batch.js
index f52f7676..9e43e406 100644
--- a/test/leak-tester-batch.js
+++ b/test/leak-tester-batch.js
@@ -25,24 +25,24 @@ function print () {
 
 const run = CHAINED
   ? function () {
-    const batch = db.batch()
+      const batch = db.batch()
 
-    for (let i = 0; i < 100; i++) {
-      let key = 'long key to test memory usage ' + String(Math.floor(Math.random() * 10000000))
-      if (BUFFERS) key = Buffer.from(key)
-      let value = crypto.randomBytes(1024)
-      if (!BUFFERS) value = value.toString('hex')
-      batch.put(key, value)
-    }
+      for (let i = 0; i < 100; i++) {
+        let key = 'long key to test memory usage ' + String(Math.floor(Math.random() * 10000000))
+        if (BUFFERS) key = Buffer.from(key)
+        let value = crypto.randomBytes(1024)
+        if (!BUFFERS) value = value.toString('hex')
+        batch.put(key, value)
+      }
 
-    batch.write(function (err) {
-      assert(!err)
-      process.nextTick(run)
-    })
+      batch.write(function (err) {
+        assert(!err)
+        process.nextTick(run)
+      })
 
-    writeCount++
-    print()
-  }
+      writeCount++
+      print()
+    }
   : function () {
     const batch = []
 

From f4be05e75662ae0390ed5f624efaf6a5137b3aa1 Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Sun, 25 Oct 2020 07:33:19 +0000
Subject: [PATCH 07/25] Bump hallmark from 2.1.0 to 3.0.0 (#735)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 1a8d86a3..99df5b3c 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "electron": "^10.1.5",
     "faucet": "^0.0.1",
     "glob": "^7.1.3",
-    "hallmark": "^2.0.0",
+    "hallmark": "^3.0.0",
     "level-community": "^3.0.0",
     "level-concat-iterator": "^2.0.0",
     "mkfiletree": "^2.0.0",

From 906017f57626b61fc6f3ab5c94e4d502612dee69 Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Tue, 17 Nov 2020 09:33:37 +0000
Subject: [PATCH 08/25] Bump electron from 10.1.5 to 11.0.0 (#749)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 99df5b3c..826fe974 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "delayed": "^2.0.0",
     "dependency-check": "^4.1.0",
     "du": "^1.0.0",
-    "electron": "^10.1.5",
+    "electron": "^11.0.0",
     "faucet": "^0.0.1",
     "glob": "^7.1.3",
     "hallmark": "^3.0.0",

From e43da1fc2f4d0da9256627f317c91b6b494200e3 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Tue, 24 Nov 2020 22:33:10 +0100
Subject: [PATCH 09/25] Configure dependabot (#750)

---
 .github/dependabot.yml | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 .github/dependabot.yml

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000..97562b91
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,16 @@
+version: 2
+updates:
+  - package-ecosystem: npm
+    directory: /
+    schedule:
+      interval: monthly
+    ignore:
+      - dependency-name: dependency-check
+      - dependency-name: cross-env
+      - dependency-name: node-gyp
+      - dependency-name: standard
+      - dependency-name: tempy
+  - package-ecosystem: gitsubmodule
+    directory: /
+    schedule:
+      interval: monthly

From 7f2fff1d33178ad03f922f22495df8840f972037 Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Wed, 25 Nov 2020 09:40:30 +0000
Subject: [PATCH 10/25] Bump tape from 4.13.3 to 5.0.1 (#718)

---
 package.json                  |  2 +-
 test/approximate-size-test.js | 12 ++++++------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/package.json b/package.json
index 826fe974..c6995db6 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "readfiletree": "^1.0.0",
     "rimraf": "^3.0.0",
     "standard": "^15.0.0",
-    "tape": "^4.10.0",
+    "tape": "^5.0.1",
     "tempy": "^0.3.0"
   },
   "hallmark": {
diff --git a/test/approximate-size-test.js b/test/approximate-size-test.js
index 06dced35..159bd92a 100644
--- a/test/approximate-size-test.js
+++ b/test/approximate-size-test.js
@@ -13,7 +13,7 @@ test('setUp db', function (t) {
 test('test argument-less approximateSize() throws', function (t) {
   t.throws(
     db.approximateSize.bind(db)
-    , { name: 'Error', message: 'approximateSize() requires valid `start`, `end` and `callback` arguments' }
+    , /^Error: approximateSize\(\) requires valid `start` and `end` arguments/
     , 'no-arg approximateSize() throws'
   )
   t.end()
@@ -22,7 +22,7 @@ test('test argument-less approximateSize() throws', function (t) {
 test('test callback-less, 1-arg, approximateSize() throws', function (t) {
   t.throws(
     db.approximateSize.bind(db, 'foo')
-    , { name: 'Error', message: 'approximateSize() requires valid `start`, `end` and `callback` arguments' }
+    , /^Error: approximateSize\(\) requires valid `start` and `end` arguments/
     , 'callback-less, 1-arg approximateSize() throws'
   )
   t.end()
@@ -31,7 +31,7 @@ test('test callback-less, 1-arg, approximateSize() throws', function (t) {
 test('test callback-less, 2-arg, approximateSize() throws', function (t) {
   t.throws(
     db.approximateSize.bind(db, 'foo', 'bar')
-    , { name: 'Error', message: 'approximateSize() requires a callback argument' }
+    , /^Error: approximateSize\(\) requires a callback argument/
     , 'callback-less, 2-arg approximateSize() throws'
   )
   t.end()
@@ -40,7 +40,7 @@ test('test callback-less, 2-arg, approximateSize() throws', function (t) {
 test('test callback-less, 3-arg, approximateSize() throws', function (t) {
   t.throws(
     db.approximateSize.bind(db, function () {})
-    , { name: 'Error', message: 'approximateSize() requires valid `start`, `end` and `callback` arguments' }
+    , /^Error: approximateSize\(\) requires valid `start` and `end` arguments/
     , 'callback-only approximateSize() throws'
   )
   t.end()
@@ -49,7 +49,7 @@ test('test callback-less, 3-arg, approximateSize() throws', function (t) {
 test('test callback-only approximateSize() throws', function (t) {
   t.throws(
     db.approximateSize.bind(db, function () {})
-    , { name: 'Error', message: 'approximateSize() requires valid `start`, `end` and `callback` arguments' }
+    , /^Error: approximateSize\(\) requires valid `start` and `end` arguments/
     , 'callback-only approximateSize() throws'
   )
   t.end()
@@ -58,7 +58,7 @@ test('test callback-only approximateSize() throws', function (t) {
 test('test 1-arg + callback approximateSize() throws', function (t) {
   t.throws(
     db.approximateSize.bind(db, 'foo', function () {})
-    , { name: 'Error', message: 'approximateSize() requires valid `start`, `end` and `callback` arguments' }
+    , /^Error: approximateSize\(\) requires valid `start` and `end` arguments/
     , '1-arg + callback approximateSize() throws'
   )
   t.end()

From 344cb1b03b2bbf8dc4b71162c3050ddfbdac5250 Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Mon, 13 Apr 2020 08:09:11 +0000
Subject: [PATCH 11/25] Bump abstract-leveldown from 6.2.3 to 6.3.0

Bumps [abstract-leveldown](https://github.com/Level/abstract-leveldown) from 6.2.3 to 6.3.0.
- [Release notes](https://github.com/Level/abstract-leveldown/releases)
- [Changelog](https://github.com/Level/abstract-leveldown/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Level/abstract-leveldown/compare/v6.2.3...v6.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index c6995db6..35005b9a 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "prebuild-darwin-x64": "prebuildify -t 8.14.0 --napi --strip"
   },
   "dependencies": {
-    "abstract-leveldown": "~6.2.1",
+    "abstract-leveldown": "^6.3.0",
     "napi-macros": "~2.0.0",
     "node-gyp-build": "~4.2.1"
   },

From 55a33b11f58c0c978115d9c1990ea72647b21a3a Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Wed, 25 Nov 2020 11:50:04 +0100
Subject: [PATCH 12/25] Skip stack exhaustion test

---
 test/iterator-recursion-test.js | 42 ++++++++++++++++++++++-----------
 1 file changed, 28 insertions(+), 14 deletions(-)

diff --git a/test/iterator-recursion-test.js b/test/iterator-recursion-test.js
index 15249b73..84b40f0b 100644
--- a/test/iterator-recursion-test.js
+++ b/test/iterator-recursion-test.js
@@ -22,23 +22,37 @@ const sourceData = (function () {
 
 test('setUp common', testCommon.setUp)
 
-test('try to create an iterator with a blown stack', function (t) {
-  // Reducing the stack size down from the default 984 for the child node
-  // process makes it easier to trigger the bug condition. But making it too low
-  // causes the child process to die for other reasons.
-  var opts = { execArgv: ['--stack-size=128'] }
-  var child = fork(path.join(__dirname, 'stack-blower.js'), ['run'], opts)
+// TODO: fix this test. It asserted that we didn't segfault if user code had an
+// infinite loop leading to stack exhaustion, which caused a node::FatalException()
+// call in our Iterator to segfault. This was fixed in 2014 (commit 85e6a38).
+//
+// Today (2020), we see occasional failures in CI again. We no longer call
+// node::FatalException() so there's a new reason. Possibly related to
+// https://github.com/Level/leveldown/issues/667.
+test.skip('try to create an iterator with a blown stack', function (t) {
+  for (let i = 0; i < 100; i++) {
+    t.test(`try to create an iterator with a blown stack (${i})`, function (t) {
+      t.plan(3)
 
-  t.plan(2)
+      // Reducing the stack size down from the default 984 for the child node
+      // process makes it easier to trigger the bug condition. But making it too low
+      // causes the child process to die for other reasons.
+      var opts = { execArgv: ['--stack-size=128'] }
+      var child = fork(path.join(__dirname, 'stack-blower.js'), ['run'], opts)
 
-  child.on('message', function (m) {
-    t.ok(true, m)
-    child.disconnect()
-  })
+      child.on('message', function (m) {
+        t.ok(true, m)
+        child.disconnect()
+      })
 
-  child.on('exit', function (code, sig) {
-    t.equal(code, 0, 'child exited normally')
-  })
+      child.on('exit', function (code, sig) {
+        t.is(code, 0, 'child exited normally')
+        t.is(sig, null, 'not terminated due to signal')
+      })
+    })
+  }
+
+  t.end()
 })
 
 test('setUp db', function (t) {

From a7893e44c9732132f0a938128011ecc240f480dc Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Fri, 1 Jan 2021 08:58:51 +0100
Subject: [PATCH 13/25] Disable dependabot on git submodules

---
 .github/dependabot.yml | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 97562b91..becce3fe 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -10,7 +10,3 @@ updates:
       - dependency-name: node-gyp
       - dependency-name: standard
       - dependency-name: tempy
-  - package-ecosystem: gitsubmodule
-    directory: /
-    schedule:
-      interval: monthly

From 18ccfcbb891228d870e44b3385d0091ba938a202 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Sun, 4 Apr 2021 11:44:06 +0200
Subject: [PATCH 14/25] Upgrade FreeBSD in CI from 12.1 to 12.2 (#760)

---
 .cirrus.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.cirrus.yml b/.cirrus.yml
index addd6c5f..934a051c 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -1,10 +1,10 @@
 freebsd_instance:
-  image_family: freebsd-12-1
+  image_family: freebsd-12-2
 
 task:
   name: FreeBSD
   provision_script:
-    - pkg install -y git libnghttp2 node npm
+    - pkg install -y git node npm
   install_script:
     - git submodule update --init --recursive
     - env ELECTRON_SKIP_BINARY_DOWNLOAD=1 npm i --unsafe-perm

From 6c2ecd76a428efe3a3069b4d9b4316989ba82caa Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Sun, 4 Apr 2021 10:29:14 +0000
Subject: [PATCH 15/25] Bump electron from 11.4.1 to 12.0.2 (#759)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 35005b9a..bf8e4f26 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "delayed": "^2.0.0",
     "dependency-check": "^4.1.0",
     "du": "^1.0.0",
-    "electron": "^11.0.0",
+    "electron": "^12.0.2",
     "faucet": "^0.0.1",
     "glob": "^7.1.3",
     "hallmark": "^3.0.0",

From 39e3ca34864c9fc55a70bb3359e99341752ed041 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Fri, 9 Apr 2021 23:41:10 +0200
Subject: [PATCH 16/25] Bump standard from 15.x to 16.x

---
 .github/dependabot.yml                 |  1 -
 chained-batch.js                       |  2 ++
 iterator.js                            | 12 ++++++------
 leveldown.js                           |  2 ++
 package.json                           |  2 +-
 test/approximate-size-test.js          |  6 +++---
 test/cleanup-hanging-iterators-test.js | 10 +++++-----
 test/compact-range-test.js             | 12 ++++++------
 test/compression-test.js               |  8 ++++----
 test/destroy-test.js                   | 14 +++++++-------
 test/getproperty-test.js               |  4 ++--
 test/iterator-recursion-test.js        | 14 +++++++-------
 test/iterator-test.js                  | 18 +++++++++---------
 test/leak-tester-iterator.js           |  2 +-
 test/make.js                           |  4 ++--
 test/port-libuv-fix-test.js            |  5 ++---
 test/repair-test.js                    |  4 ++--
 test/stack-blower.js                   |  4 ++--
 18 files changed, 63 insertions(+), 61 deletions(-)

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index becce3fe..809d16bc 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -8,5 +8,4 @@ updates:
       - dependency-name: dependency-check
       - dependency-name: cross-env
       - dependency-name: node-gyp
-      - dependency-name: standard
       - dependency-name: tempy
diff --git a/chained-batch.js b/chained-batch.js
index 0bd9a673..ab7a743c 100644
--- a/chained-batch.js
+++ b/chained-batch.js
@@ -1,3 +1,5 @@
+'use strict'
+
 const util = require('util')
 const AbstractChainedBatch = require('abstract-leveldown').AbstractChainedBatch
 const binding = require('./binding')
diff --git a/iterator.js b/iterator.js
index 2115eef2..2805c331 100644
--- a/iterator.js
+++ b/iterator.js
@@ -1,3 +1,5 @@
+'use strict'
+
 const util = require('util')
 const AbstractIterator = require('abstract-leveldown').AbstractIterator
 const binding = require('./binding')
@@ -23,19 +25,17 @@ Iterator.prototype._seek = function (target) {
 }
 
 Iterator.prototype._next = function (callback) {
-  var that = this
-
   if (this.cache && this.cache.length) {
     process.nextTick(callback, null, this.cache.pop(), this.cache.pop())
   } else if (this.finished) {
     process.nextTick(callback)
   } else {
-    binding.iterator_next(this.context, function (err, array, finished) {
+    binding.iterator_next(this.context, (err, array, finished) => {
       if (err) return callback(err)
 
-      that.cache = array
-      that.finished = finished
-      that._next(callback)
+      this.cache = array
+      this.finished = finished
+      this._next(callback)
     })
   }
 
diff --git a/leveldown.js b/leveldown.js
index efb31f62..ad7d0abe 100644
--- a/leveldown.js
+++ b/leveldown.js
@@ -1,3 +1,5 @@
+'use strict'
+
 const util = require('util')
 const AbstractLevelDOWN = require('abstract-leveldown').AbstractLevelDOWN
 const binding = require('./binding')
diff --git a/package.json b/package.json
index bf8e4f26..d3e4e171 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "prebuildify-cross": "^4.0.0",
     "readfiletree": "^1.0.0",
     "rimraf": "^3.0.0",
-    "standard": "^15.0.0",
+    "standard": "^16.0.3",
     "tape": "^5.0.1",
     "tempy": "^0.3.0"
   },
diff --git a/test/approximate-size-test.js b/test/approximate-size-test.js
index 159bd92a..e1adc4d4 100644
--- a/test/approximate-size-test.js
+++ b/test/approximate-size-test.js
@@ -1,7 +1,7 @@
 const test = require('tape')
 const testCommon = require('./common')
 
-var db
+let db
 
 test('setUp common for approximate size', testCommon.setUp)
 
@@ -66,7 +66,7 @@ test('test 1-arg + callback approximateSize() throws', function (t) {
 
 test('test custom _serialize*', function (t) {
   t.plan(4)
-  var db = testCommon.factory()
+  const db = testCommon.factory()
   db._serializeKey = function (data) { return data }
   db.approximateSize = function (start, end, callback) {
     t.deepEqual(start, { foo: 'bar' })
@@ -82,7 +82,7 @@ test('test custom _serialize*', function (t) {
 })
 
 test('test approximateSize()', function (t) {
-  var data = Array.apply(null, Array(10000)).map(function () {
+  const data = Array.apply(null, Array(10000)).map(function () {
     return 'aaaaaaaaaa'
   }).join('')
 
diff --git a/test/cleanup-hanging-iterators-test.js b/test/cleanup-hanging-iterators-test.js
index 5ff54103..89578a28 100644
--- a/test/cleanup-hanging-iterators-test.js
+++ b/test/cleanup-hanging-iterators-test.js
@@ -3,7 +3,7 @@ const repeats = 200
 
 makeTest('test ended iterator', function (db, t, done) {
   // First test normal and proper usage: calling it.end() before db.close()
-  var it = db.iterator({ keyAsBuffer: false, valueAsBuffer: false })
+  const it = db.iterator({ keyAsBuffer: false, valueAsBuffer: false })
 
   it.next(function (err, key, value) {
     t.ifError(err, 'no error from next()')
@@ -19,7 +19,7 @@ makeTest('test ended iterator', function (db, t, done) {
 makeTest('test likely-ended iterator', function (db, t, done) {
   // Test improper usage: not calling it.end() before db.close(). Cleanup of the
   // database will crash Node if not handled properly.
-  var it = db.iterator({ keyAsBuffer: false, valueAsBuffer: false })
+  const it = db.iterator({ keyAsBuffer: false, valueAsBuffer: false })
 
   it.next(function (err, key, value) {
     t.ifError(err, 'no error from next()')
@@ -33,7 +33,7 @@ makeTest('test non-ended iterator', function (db, t, done) {
   // Same as the test above but with a highWaterMark of 0 so that we don't
   // preemptively fetch all records, to ensure that the iterator is still
   // active when we (attempt to) close the database.
-  var it = db.iterator({
+  const it = db.iterator({
     highWaterMark: 0,
     keyAsBuffer: false,
     valueAsBuffer: false
@@ -84,10 +84,10 @@ global.gc && makeTest('test multiple non-ended iterators with forced gc', functi
 
 makeTest('test ending iterators', function (db, t, done) {
   // At least one end() should be in progress when we try to close the db.
-  var it1 = db.iterator().next(function () {
+  const it1 = db.iterator().next(function () {
     it1.end(function () {})
   })
-  var it2 = db.iterator().next(function () {
+  const it2 = db.iterator().next(function () {
     it2.end(function () {})
     done()
   })
diff --git a/test/compact-range-test.js b/test/compact-range-test.js
index f4fe4d57..286da619 100644
--- a/test/compact-range-test.js
+++ b/test/compact-range-test.js
@@ -11,10 +11,10 @@ test('setUp db', function (t) {
 })
 
 test('test compactRange() frees disk space after key deletion', function (t) {
-  var key1 = '000000'
-  var key2 = '000001'
-  var val1 = Buffer.allocUnsafe(64).fill(1)
-  var val2 = Buffer.allocUnsafe(64).fill(1)
+  const key1 = '000000'
+  const key2 = '000001'
+  const val1 = Buffer.allocUnsafe(64).fill(1)
+  const val2 = Buffer.allocUnsafe(64).fill(1)
 
   db.batch().put(key1, val1).put(key2, val2).write(function (err) {
     t.ifError(err, 'no batch put error')
@@ -46,8 +46,8 @@ test('test compactRange() frees disk space after key deletion', function (t) {
 test('test compactRange() serializes start and end', function (t) {
   t.plan(3)
 
-  var clone = Object.create(db)
-  var count = 0
+  const clone = Object.create(db)
+  let count = 0
 
   clone._serializeKey = function (key) {
     t.is(key, count++)
diff --git a/test/compression-test.js b/test/compression-test.js
index 63c715da..e233f0d8 100644
--- a/test/compression-test.js
+++ b/test/compression-test.js
@@ -26,7 +26,7 @@ const verify = function (location, compression, t) {
 
 // close, open, close again.. 'compaction' is also performed on open()s
 const cycle = function (db, compression, t, callback) {
-  var location = db.location
+  const location = db.location
   db.close(function (err) {
     t.error(err)
     db = leveldown(location)
@@ -45,7 +45,7 @@ test('compression', function (t) {
   t.test('set up', testCommon.setUp)
 
   t.test('test data is compressed by default (db.put())', function (t) {
-    var db = testCommon.factory()
+    const db = testCommon.factory()
     db.open(function (err) {
       t.error(err)
       each(
@@ -59,7 +59,7 @@ test('compression', function (t) {
   })
 
   t.test('test data is not compressed with compression=false on open() (db.put())', function (t) {
-    var db = testCommon.factory()
+    const db = testCommon.factory()
     db.open({ compression: false }, function (err) {
       t.error(err)
       each(
@@ -73,7 +73,7 @@ test('compression', function (t) {
   })
 
   t.test('test data is compressed by default (db.batch())', function (t) {
-    var db = testCommon.factory()
+    const db = testCommon.factory()
     db.open(function (err) {
       t.error(err)
       db.batch(
diff --git a/test/destroy-test.js b/test/destroy-test.js
index 68029f48..be1dc2e8 100644
--- a/test/destroy-test.js
+++ b/test/destroy-test.js
@@ -27,8 +27,8 @@ test('test callback-less, 1-arg, destroy() throws', function (t) {
 test('test destroy non-existent directory', function (t) {
   t.plan(4)
 
-  var location = tempy.directory()
-  var parent = path.dirname(location)
+  const location = tempy.directory()
+  const parent = path.dirname(location)
 
   // For symmetry with the opposite test below.
   t.ok(fs.existsSync(parent), 'parent exists before')
@@ -50,8 +50,8 @@ test('test destroy non-existent directory', function (t) {
 test('test destroy non-existent parent directory', function (t) {
   t.plan(3)
 
-  var location = '/1/2/3/4'
-  var parent = path.dirname(location)
+  const location = '/1/2/3/4'
+  const parent = path.dirname(location)
 
   t.notOk(fs.existsSync(parent), 'parent does not exist before')
 
@@ -62,7 +62,7 @@ test('test destroy non-existent parent directory', function (t) {
 })
 
 test('test destroy non leveldb directory', function (t) {
-  var tree = {
+  const tree = {
     foo: 'FOO',
     bar: { one: 'ONE', two: 'TWO', three: 'THREE' }
   }
@@ -87,7 +87,7 @@ test('test destroy non leveldb directory', function (t) {
 })
 
 makeTest('test destroy() cleans and removes leveldb-only dir', function (db, t, done) {
-  var location = db.location
+  const location = db.location
   db.close(function (err) {
     t.ifError(err, 'no error from close()')
 
@@ -101,7 +101,7 @@ makeTest('test destroy() cleans and removes leveldb-only dir', function (db, t,
 })
 
 makeTest('test destroy() cleans and removes only leveldb parts of a dir', function (db, t, done) {
-  var location = db.location
+  const location = db.location
   fs.writeFileSync(path.join(location, 'foo'), 'FOO')
 
   db.close(function (err) {
diff --git a/test/getproperty-test.js b/test/getproperty-test.js
index fa072c63..d27b1de0 100644
--- a/test/getproperty-test.js
+++ b/test/getproperty-test.js
@@ -33,7 +33,7 @@ test('test invalid getProperty() returns empty string', function (t) {
 })
 
 test('test invalid getProperty("leveldb.num-files-at-levelN") returns numbers', function (t) {
-  for (var i = 0; i < 7; i++) {
+  for (let i = 0; i < 7; i++) {
     t.equal(db.getProperty('leveldb.num-files-at-level' + i),
       '0', '"leveldb.num-files-at-levelN" === "0"')
   }
@@ -46,7 +46,7 @@ test('test invalid getProperty("leveldb.stats")', function (t) {
 })
 
 test('test invalid getProperty("leveldb.sstables")', function (t) {
-  var expected = [0, 1, 2, 3, 4, 5, 6].map(function (l) {
+  const expected = [0, 1, 2, 3, 4, 5, 6].map(function (l) {
     return '--- level ' + l + ' ---'
   }).join('\n') + '\n'
   t.equal(db.getProperty('leveldb.sstables'), expected, 'leveldb.sstables')
diff --git a/test/iterator-recursion-test.js b/test/iterator-recursion-test.js
index 84b40f0b..aa4b96e1 100644
--- a/test/iterator-recursion-test.js
+++ b/test/iterator-recursion-test.js
@@ -6,9 +6,9 @@ const path = require('path')
 let db
 
 const sourceData = (function () {
-  var d = []
-  var i = 0
-  var k
+  const d = []
+  let i = 0
+  let k
   for (; i < 100000; i++) {
     k = (i < 10 ? '0' : '') + i
     d.push({
@@ -37,8 +37,8 @@ test.skip('try to create an iterator with a blown stack', function (t) {
       // Reducing the stack size down from the default 984 for the child node
       // process makes it easier to trigger the bug condition. But making it too low
       // causes the child process to die for other reasons.
-      var opts = { execArgv: ['--stack-size=128'] }
-      var child = fork(path.join(__dirname, 'stack-blower.js'), ['run'], opts)
+      const opts = { execArgv: ['--stack-size=128'] }
+      const child = fork(path.join(__dirname, 'stack-blower.js'), ['run'], opts)
 
       child.on('message', function (m) {
         t.ok(true, m)
@@ -64,10 +64,10 @@ test('setUp db', function (t) {
 })
 
 test('iterate over a large iterator with a large watermark', function (t) {
-  var iterator = db.iterator({
+  const iterator = db.iterator({
     highWaterMark: 10000000
   })
-  var read = function () {
+  const read = function () {
     iterator.next(function () {
       if (!arguments.length) {
         t.end()
diff --git a/test/iterator-test.js b/test/iterator-test.js
index 1a03b7cf..760e7360 100644
--- a/test/iterator-test.js
+++ b/test/iterator-test.js
@@ -3,12 +3,12 @@ const make = require('./make')
 // This test isn't included in abstract-leveldown because
 // the empty-check is currently performed by leveldown.
 make('iterator#seek throws if target is empty', function (db, t, done) {
-  var targets = ['', Buffer.alloc(0), []]
-  var pending = targets.length
+  const targets = ['', Buffer.alloc(0), []]
+  let pending = targets.length
 
   targets.forEach(function (target) {
-    var ite = db.iterator()
-    var error
+    const ite = db.iterator()
+    let error
 
     try {
       ite.seek(target)
@@ -27,7 +27,7 @@ make('iterator#seek throws if target is empty', function (db, t, done) {
 })
 
 make('iterator optimized for seek', function (db, t, done) {
-  var batch = db.batch()
+  const batch = db.batch()
   batch.put('a', 1)
   batch.put('b', 1)
   batch.put('c', 1)
@@ -36,7 +36,7 @@ make('iterator optimized for seek', function (db, t, done) {
   batch.put('f', 1)
   batch.put('g', 1)
   batch.write(function (err) {
-    var ite = db.iterator()
+    const ite = db.iterator()
     t.ifError(err, 'no error from batch()')
     ite.next(function (err, key, value) {
       t.ifError(err, 'no error from next()')
@@ -65,9 +65,9 @@ make('iterator optimized for seek', function (db, t, done) {
 })
 
 make('close db with open iterator', function (db, t, done) {
-  var ite = db.iterator()
-  var cnt = 0
-  var hadError = false
+  const ite = db.iterator()
+  let cnt = 0
+  let hadError = false
 
   ite.next(function loop (err, key, value) {
     if (cnt++ === 0) {
diff --git a/test/leak-tester-iterator.js b/test/leak-tester-iterator.js
index 5e2cc593..604d7754 100644
--- a/test/leak-tester-iterator.js
+++ b/test/leak-tester-iterator.js
@@ -8,7 +8,7 @@ if (!global.gc) {
 }
 
 function run () {
-  var it = db.iterator()
+  const it = db.iterator()
 
   it.next(function (err) {
     if (err) throw err
diff --git a/test/make.js b/test/make.js
index 61fff6d3..ba260d3b 100644
--- a/test/make.js
+++ b/test/make.js
@@ -3,8 +3,8 @@ const testCommon = require('./common')
 
 function makeTest (name, testFn) {
   test(name, function (t) {
-    var db = testCommon.factory()
-    var done = function (err, close) {
+    const db = testCommon.factory()
+    const done = function (err, close) {
       t.ifError(err, 'no error from done()')
 
       if (close === false) {
diff --git a/test/port-libuv-fix-test.js b/test/port-libuv-fix-test.js
index 496d76a7..c928681f 100644
--- a/test/port-libuv-fix-test.js
+++ b/test/port-libuv-fix-test.js
@@ -3,13 +3,12 @@ const path = require('path')
 const fs = require('fs')
 
 test('test port-libuv is being used', function (t) {
-  var version = fs.readFileSync(path.join(__dirname, '../deps/leveldb/leveldb.gyp'), 'utf8')
+  const version = fs.readFileSync(path.join(__dirname, '../deps/leveldb/leveldb.gyp'), 'utf8')
     .match(/"ldbversion": "([^"]+)"/)[1]
-  var porth
 
   t.ok(version, 'matched current leveldb version')
 
-  porth = fs.readFileSync(path.join(__dirname, '../deps/leveldb/leveldb-' + version + '/port/port.h'), 'utf8')
+  const porth = fs.readFileSync(path.join(__dirname, '../deps/leveldb/leveldb-' + version + '/port/port.h'), 'utf8')
 
   t.ok(/"port_uv\.h"/.test(porth), 'port.h includes reference to port_uv.h')
 
diff --git a/test/repair-test.js b/test/repair-test.js
index 9dc03d48..6112c262 100644
--- a/test/repair-test.js
+++ b/test/repair-test.js
@@ -32,12 +32,12 @@ test('test repair non-existent directory returns error', function (t) {
 
 // a proxy indicator that RepairDB is being called and doing its thing
 makeTest('test repair() compacts', function (db, t, done) {
-  var location = db.location
+  const location = db.location
 
   db.close(function (err) {
     t.ifError(err, 'no error from close()')
 
-    var files = fs.readdirSync(location)
+    let files = fs.readdirSync(location)
     t.ok(files.some(function (f) { return (/\.log$/).test(f) }), 'directory contains log file(s)')
     t.notOk(files.some(function (f) { return (/\.ldb$/).test(f) }), 'directory does not contain ldb file(s)')
 
diff --git a/test/stack-blower.js b/test/stack-blower.js
index b802b0eb..24f0a18c 100644
--- a/test/stack-blower.js
+++ b/test/stack-blower.js
@@ -8,8 +8,8 @@
 const testCommon = require('./common')
 
 if (process.argv[2] === 'run') {
-  var db = testCommon.factory()
-  var depth = 0
+  const db = testCommon.factory()
+  let depth = 0
 
   db.open(function () {
     function recurse () {

From 8502b343b52f1ce70a272e43da507e2293838284 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Fri, 9 Apr 2021 23:47:55 +0200
Subject: [PATCH 17/25] Breaking: drop node 6 and 8 (Level/community#98)

---
 .travis.yml  | 14 ++++++++++----
 appveyor.yml |  2 +-
 package.json |  2 +-
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 65fd8c45..be126be8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,10 +3,13 @@ language: node_js
 jobs:
   include:
     - os: linux
-      node_js: 8
+      node_js: 10
       env: [TEST=1]
     - os: linux
-      node_js: 10
+      node_js: 12
+      env: [TEST=1]
+    - os: linux
+      node_js: 14
       env: [TEST=1]
     - os: linux
       node_js: node
@@ -19,10 +22,13 @@ jobs:
         - export DISPLAY=':99.0'
         - Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
     - os: osx
-      node_js: 8
+      node_js: 10
       env: [TEST=1]
     - os: osx
-      node_js: 10
+      node_js: 12
+      env: [TEST=1]
+    - os: osx
+      node_js: 14
       env: [TEST=1]
     - os: osx
       node_js: node
diff --git a/appveyor.yml b/appveyor.yml
index f22281fc..0bccd001 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,8 +3,8 @@ skip_branch_with_pr: true
 
 environment:
   matrix:
-    - nodejs_version: "8"
     - nodejs_version: "10"
+    - nodejs_version: "12"
     - nodejs_version: "Current"
 
 configuration: Release
diff --git a/package.json b/package.json
index d3e4e171..49ac361a 100644
--- a/package.json
+++ b/package.json
@@ -67,6 +67,6 @@
     "level"
   ],
   "engines": {
-    "node": ">=8.6.0"
+    "node": ">=10"
   }
 }

From 2dad78b3c14f960b83803eec8354475d728374b1 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Fri, 9 Apr 2021 23:48:40 +0200
Subject: [PATCH 18/25] Bump tempy

---
 .github/dependabot.yml | 1 -
 package.json           | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 809d16bc..b7f7c9c3 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -8,4 +8,3 @@ updates:
       - dependency-name: dependency-check
       - dependency-name: cross-env
       - dependency-name: node-gyp
-      - dependency-name: tempy
diff --git a/package.json b/package.json
index 49ac361a..14066fcd 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "rimraf": "^3.0.0",
     "standard": "^16.0.3",
     "tape": "^5.0.1",
-    "tempy": "^0.3.0"
+    "tempy": "^1.0.1"
   },
   "hallmark": {
     "community": "level-community"

From bdfb17a0114aed7d7de541d7572a0d9fe7908349 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Fri, 9 Apr 2021 23:51:35 +0200
Subject: [PATCH 19/25] Bump cross-env

---
 .github/dependabot.yml | 1 -
 package.json           | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index b7f7c9c3..8f9a8c67 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -6,5 +6,4 @@ updates:
       interval: monthly
     ignore:
       - dependency-name: dependency-check
-      - dependency-name: cross-env
       - dependency-name: node-gyp
diff --git a/package.json b/package.json
index 14066fcd..65521e7c 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   "devDependencies": {
     "async-each": "^1.0.3",
     "coveralls": "^3.0.2",
-    "cross-env": "^6.0.0",
+    "cross-env": "^7.0.3",
     "delayed": "^2.0.0",
     "dependency-check": "^4.1.0",
     "du": "^1.0.0",

From 39b9d3fa937b8683cccf1a537caf5edfa8ac1cab Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Sat, 10 Apr 2021 00:09:45 +0200
Subject: [PATCH 20/25] Bump level-concat-iterator

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 65521e7c..70b70ba0 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "glob": "^7.1.3",
     "hallmark": "^3.0.0",
     "level-community": "^3.0.0",
-    "level-concat-iterator": "^2.0.0",
+    "level-concat-iterator": "^3.0.0",
     "mkfiletree": "^2.0.0",
     "node-gyp": "^6.0.0",
     "nyc": "^15.0.0",

From 8bc56962a1f5ab9972aadefeee738248b5f73c7b Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Sat, 10 Apr 2021 00:11:54 +0200
Subject: [PATCH 21/25] Bump node-gyp from 6.x to 7.x

---
 package.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 70b70ba0..6710f3f2 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "level-community": "^3.0.0",
     "level-concat-iterator": "^3.0.0",
     "mkfiletree": "^2.0.0",
-    "node-gyp": "^6.0.0",
+    "node-gyp": "^7.1.2",
     "nyc": "^15.0.0",
     "prebuildify": "^4.1.0",
     "prebuildify-ci": "^1.0.4",
@@ -67,6 +67,6 @@
     "level"
   ],
   "engines": {
-    "node": ">=10"
+    "node": ">=10.12.0"
   }
 }

From 15d5a9e2c69b720790a6077517460ef671b19530 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Sat, 10 Apr 2021 00:31:43 +0200
Subject: [PATCH 22/25] Breaking: bump abstract-leveldown

Removes legacy ranges options (Level/community#86).
---
 README.md                       |  2 -
 binding.cc                      | 85 ++++++++++-----------------------
 package.json                    |  2 +-
 test/empty-range-option-test.js |  2 +-
 test/iterator-recursion-test.js |  6 ++-
 test/stack-blower.js            |  2 +-
 6 files changed, 33 insertions(+), 66 deletions(-)

diff --git a/README.md b/README.md
index fe360296..72d4f352 100644
--- a/README.md
+++ b/README.md
@@ -275,8 +275,6 @@ Returns a new [`iterator`](#iterator) instance. The optional `options` object ma
 
 - `lt` (less than), `lte` (less than or equal) define the higher bound of the range to be fetched and will determine the starting point where `reverse` is _not_ `true`. Only records where the key is less than (or equal to) this option will be included in the range. When `reverse` is `true` the order will be reversed, but the records returned will be the same.
 
-- `start, end` legacy ranges - instead use `gte, lte`
-
 - `reverse` _(boolean, default: `false`)_: a boolean, set to `true` if you want the stream to go in reverse order. Beware that due to the way LevelDB works, a reverse seek will be slower than a forward seek.
 
 - `keys` (boolean, default: `true`): whether the callback to the `next()` method should receive a non-null `key`. There is a small efficiency gain if you ultimately don't care what the keys are as they don't need to be converted and copied into JavaScript.
diff --git a/binding.cc b/binding.cc
index e938a40c..3d0ed733 100644
--- a/binding.cc
+++ b/binding.cc
@@ -499,8 +499,6 @@ struct PriorityWorker : public BaseWorker {
 struct Iterator {
   Iterator (Database* database,
             uint32_t id,
-            std::string* start,
-            std::string* end,
             bool reverse,
             bool keys,
             bool values,
@@ -515,8 +513,6 @@ struct Iterator {
             uint32_t highWaterMark)
     : database_(database),
       id_(id),
-      start_(start),
-      end_(end),
       reverse_(reverse),
       keys_(keys),
       values_(values),
@@ -544,8 +540,6 @@ struct Iterator {
   ~Iterator () {
     assert(ended_);
 
-    if (start_ != NULL) delete start_;
-    if (end_ != NULL) delete end_;
     if (lt_ != NULL) delete lt_;
     if (gt_ != NULL) delete gt_;
     if (lte_ != NULL) delete lte_;
@@ -588,32 +582,29 @@ struct Iterator {
 
     dbIterator_ = database_->NewIterator(options_);
 
-    if (start_ != NULL) {
-      dbIterator_->Seek(*start_);
+    if (!reverse_ && gte_ != NULL) {
+      dbIterator_->Seek(*gte_);
+    } else if (!reverse_ && gt_ != NULL) {
+      dbIterator_->Seek(*gt_);
 
-      if (reverse_) {
-        if (!dbIterator_->Valid()) {
-          dbIterator_->SeekToLast();
-        } else {
-          leveldb::Slice key = dbIterator_->key();
-
-          if ((lt_ != NULL && key.compare(*lt_) >= 0) ||
-              (lte_ != NULL && key.compare(*lte_) > 0) ||
-              (start_ != NULL && key.compare(*start_) > 0)) {
-            dbIterator_->Prev();
-          }
-        }
+      if (dbIterator_->Valid() && dbIterator_->key().compare(*gt_) == 0) {
+        dbIterator_->Next();
+      }
+    } else if (reverse_ && lte_ != NULL) {
+      dbIterator_->Seek(*lte_);
 
-        // TODO: this looks like dead code. Remove it in a
-        // next major release together with Level/community#86.
-        if (dbIterator_->Valid() && lt_ != NULL) {
-          if (dbIterator_->key().compare(*lt_) >= 0)
-            dbIterator_->Prev();
-        }
-      } else {
-        if (dbIterator_->Valid() && gt_ != NULL
-            && dbIterator_->key().compare(*gt_) == 0)
-          dbIterator_->Next();
+      if (!dbIterator_->Valid()) {
+        dbIterator_->SeekToLast();
+      } else if (dbIterator_->key().compare(*lte_) > 0) {
+        dbIterator_->Prev();
+      }
+    } else if (reverse_ && lt_ != NULL) {
+      dbIterator_->Seek(*lt_);
+
+      if (!dbIterator_->Valid()) {
+        dbIterator_->SeekToLast();
+      } else if (dbIterator_->key().compare(*lt_) >= 0) {
+        dbIterator_->Prev();
       }
     } else if (reverse_) {
       dbIterator_->SeekToLast();
@@ -638,12 +629,8 @@ struct Iterator {
 
     if (dbIterator_->Valid()) {
       std::string keyStr = dbIterator_->key().ToString();
-      const int isEnd = end_ == NULL ? 1 : end_->compare(keyStr);
 
       if ((limit_ < 0 || ++count_ <= limit_)
-          && (end_ == NULL
-              || (reverse_ && (isEnd <= 0))
-              || (!reverse_ && (isEnd >= 0)))
           && ( lt_  != NULL ? (lt_->compare(keyStr) > 0)
                : lte_ != NULL ? (lte_->compare(keyStr) >= 0)
                : true )
@@ -665,20 +652,10 @@ struct Iterator {
   }
 
   bool OutOfRange (leveldb::Slice& target) {
-    if ((lt_ != NULL && target.compare(*lt_) >= 0) ||
-        (lte_ != NULL && target.compare(*lte_) > 0) ||
-        (start_ != NULL && reverse_ && target.compare(*start_) > 0)) {
-      return true;
-    }
-
-    if (end_ != NULL) {
-      int d = target.compare(*end_);
-      if (reverse_ ? d < 0 : d > 0) return true;
-    }
-
-    return ((gt_ != NULL && target.compare(*gt_) <= 0) ||
-            (gte_ != NULL && target.compare(*gte_) < 0) ||
-            (start_ != NULL && !reverse_ && target.compare(*start_) < 0));
+    return ((lt_  != NULL && target.compare(*lt_) >= 0) ||
+            (lte_ != NULL && target.compare(*lte_) > 0) ||
+            (gt_  != NULL && target.compare(*gt_) <= 0) ||
+            (gte_ != NULL && target.compare(*gte_) < 0));
   }
 
   bool IteratorNext (std::vector<std::pair<std::string, std::string> >& result) {
@@ -711,8 +688,6 @@ struct Iterator {
 
   Database* database_;
   uint32_t id_;
-  std::string* start_;
-  std::string* end_;
   bool reverse_;
   bool keys_;
   bool values_;
@@ -1251,21 +1226,13 @@ NAPI_METHOD(iterator_init) {
   uint32_t highWaterMark = Uint32Property(env, options, "highWaterMark",
                                           16 * 1024);
 
-  std::string* start = NULL;
-  std::string* end = RangeOption(env, options, "end");
   std::string* lt = RangeOption(env, options, "lt");
   std::string* lte = RangeOption(env, options, "lte");
   std::string* gt = RangeOption(env, options, "gt");
   std::string* gte = RangeOption(env, options, "gte");
 
-  if (!reverse && gte != NULL) start = new std::string(*gte);
-  else if (!reverse && gt != NULL) start = new std::string(*gt);
-  else if (reverse && lte != NULL) start = new std::string(*lte);
-  else if (reverse && lt != NULL) start = new std::string(*lt);
-  else start = RangeOption(env, options, "start");
-
   uint32_t id = database->currentIteratorId_++;
-  Iterator* iterator = new Iterator(database, id, start, end, reverse, keys,
+  Iterator* iterator = new Iterator(database, id, reverse, keys,
                                     values, limit, lt, lte, gt, gte, fillCache,
                                     keyAsBuffer, valueAsBuffer, highWaterMark);
   napi_value result;
diff --git a/package.json b/package.json
index 6710f3f2..e83d03cb 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "prebuild-darwin-x64": "prebuildify -t 8.14.0 --napi --strip"
   },
   "dependencies": {
-    "abstract-leveldown": "^6.3.0",
+    "abstract-leveldown": "^7.0.0",
     "napi-macros": "~2.0.0",
     "node-gyp-build": "~4.2.1"
   },
diff --git a/test/empty-range-option-test.js b/test/empty-range-option-test.js
index 6f6974de..d6a2fdec 100644
--- a/test/empty-range-option-test.js
+++ b/test/empty-range-option-test.js
@@ -1,7 +1,7 @@
 const test = require('tape')
 const concat = require('level-concat-iterator')
 const testCommon = require('./common')
-const rangeOptions = 'start end gt gte lt lte'.split(' ')
+const rangeOptions = ['gt', 'gte', 'lt', 'lte']
 
 test('empty range options are ignored', function (t) {
   const db = testCommon.factory()
diff --git a/test/iterator-recursion-test.js b/test/iterator-recursion-test.js
index aa4b96e1..fbdc4293 100644
--- a/test/iterator-recursion-test.js
+++ b/test/iterator-recursion-test.js
@@ -68,8 +68,10 @@ test('iterate over a large iterator with a large watermark', function (t) {
     highWaterMark: 10000000
   })
   const read = function () {
-    iterator.next(function () {
-      if (!arguments.length) {
+    iterator.next(function (err, key, value) {
+      if (err) throw err
+
+      if (key === undefined && value === undefined) {
         t.end()
       } else {
         read()
diff --git a/test/stack-blower.js b/test/stack-blower.js
index 24f0a18c..390bcbb5 100644
--- a/test/stack-blower.js
+++ b/test/stack-blower.js
@@ -13,7 +13,7 @@ if (process.argv[2] === 'run') {
 
   db.open(function () {
     function recurse () {
-      db.iterator({ start: '0' })
+      db.iterator({ gte: '0' })
       depth++
       recurse()
     }

From cff883a8e0c3aee4ee01d48fd9a1664ca077e889 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Sat, 10 Apr 2021 22:21:30 +0200
Subject: [PATCH 23/25] Update readme and .npmignore

---
 .npmignore | 2 ++
 README.md  | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/.npmignore b/.npmignore
index fa851227..99b0acc3 100644
--- a/.npmignore
+++ b/.npmignore
@@ -29,6 +29,7 @@ libleveldb.a
 *.sln
 *.vcxproj
 *.vcxproj.filters
+.vscode
 
 # Benchmarks and tests
 test/
@@ -39,6 +40,7 @@ test/
 .nyc_output/
 yarn.lock
 .gitmodules
+.github
 .travis.yml
 .cirrus.yml
 appveyor.yml
diff --git a/README.md b/README.md
index 72d4f352..5cdef558 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ See the section on <a href="#safety">safety</a> below for details of known unsaf
 
 ## Supported Platforms
 
-We aim to support _at least_ Active LTS and Current Node.js releases, Electron 4.0.0, as well as any future Node.js and Electron releases thanks to [N-API](https://nodejs.org/api/n-api.html). The minimum node version for `leveldown` is `8.6.0`. Conversely, for node >= 12, the minimum `leveldown` version is `5.0.0`.
+We aim to support _at least_ Active LTS and Current Node.js releases, Electron 5.0.0, as well as any future Node.js and Electron releases thanks to [N-API](https://nodejs.org/api/n-api.html). The minimum node version for `leveldown` is `10.12.0`. Conversely, for node >= 12, the minimum `leveldown` version is `5.0.0`.
 
 The `leveldown` npm package ships with prebuilt binaries for popular 64-bit platforms as well as ARM, Android and Alpine (musl) and is known to work on:
 
@@ -454,7 +454,7 @@ $ git submodule update --init --recursive
 3. Wait for Travis and AppVeyor builds to complete
 4. Download prebuilds into `./prebuilds`: `npm run download-prebuilds`
 5. Optionally verify loading a prebuild: `npm run test-prebuild`
-6. Optionally verify which files npm will include: `irish-pub`
+6. Optionally verify which files npm will include: `canadian-pub`
 7. Add changelog to the GitHub release
 8. Finally: `npm publish`
 

From 686d68519c81003c7a854b2018ddbd56a08d89a2 Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Sat, 10 Apr 2021 22:28:23 +0200
Subject: [PATCH 24/25] Remove default export (Level/community#87)

---
 leveldown.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/leveldown.js b/leveldown.js
index ad7d0abe..67f993e5 100644
--- a/leveldown.js
+++ b/leveldown.js
@@ -152,4 +152,4 @@ LevelDOWN.repair = function (location, callback) {
   binding.repair_db(location, callback)
 }
 
-module.exports = LevelDOWN.default = LevelDOWN
+module.exports = LevelDOWN

From 77b5238cc44e6ca6e685c9e930ee1c6b8656caaf Mon Sep 17 00:00:00 2001
From: Vincent Weevers <mail@vincentweevers.nl>
Date: Sat, 10 Apr 2021 23:41:48 +0200
Subject: [PATCH 25/25] 6.0.0

---
 CHANGELOG.md | 19 ++++++++++++++++++-
 README.md    | 36 ++++++++++++++++++++++++++++++++++++
 UPGRADING.md | 24 ++++++++++++++++++++----
 appveyor.yml |  2 +-
 package.json |  2 +-
 5 files changed, 76 insertions(+), 7 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ddd2e548..ee8a1e8e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,21 @@
 
 _**If you are upgrading:** please see [`UPGRADING.md`](UPGRADING.md)._
 
+## [6.0.0] - 2021-04-10
+
+### Changed
+
+- **Breaking:** bump `abstract-leveldown` ([`15d5a9e`](https://github.com/Level/leveldown/commit/15d5a9e)) (Vincent Weevers)
+- **Breaking:** drop node 6 and 8 ([Level/community#98](https://github.com/Level/community/issues/98)) ([`8502b34`](https://github.com/Level/leveldown/commit/8502b34)) (Vincent Weevers)
+- Bump `node-gyp` from 6.x to 7.x ([`8bc5696`](https://github.com/Level/leveldown/commit/8bc5696)) (Vincent Weevers)
+- Bump `standard` from 14.x to 16.x ([`d39e232`](https://github.com/Level/leveldown/commit/d39e232), [`39e3ca3`](https://github.com/Level/leveldown/commit/39e3ca3)) (Vincent Weevers)
+- Bump `node-gyp-build` from 4.1.x to 4.2.x ([#708](https://github.com/Level/leveldown/issues/708)) ([`91711fa`](https://github.com/Level/leveldown/commit/91711fa)) (Vincent Weevers)
+- Skip stack exhaustion test ([`55a33b1`](https://github.com/Level/leveldown/commit/55a33b1)) (Vincent Weevers)
+
+### Removed
+
+- Remove default export ([Level/community#87](https://github.com/Level/community/issues/87)) ([`686d685`](https://github.com/Level/leveldown/commit/686d685)) (Vincent Weevers)
+
 ## [5.6.0] - 2020-03-27
 
 ### Changed
@@ -793,7 +808,7 @@ _**If you are upgrading:** please see [`UPGRADING.md`](UPGRADING.md)._
 
 ### Changed
 
-- Upgrade to `nan@0.6` for Node@0.11.6 support, `v8::Local<T>::New(val)` rewritten to `NanNewLocal<T>(val)` ([**@rvagg**](https://github.com/rvagg))
+- Upgrade to `nan@0.6` for Node 0.11.6 support, `v8::Local<T>::New(val)` rewritten to `NanNewLocal<T>(val)` ([**@rvagg**](https://github.com/rvagg))
 
 **Historical Note** From this release and onward, tags in git start with the prefix `v`, i.e. this release corresponds to the tag `v0.10.1`.
 
@@ -1083,6 +1098,8 @@ _**If you are upgrading:** please see [`UPGRADING.md`](UPGRADING.md)._
 
 :seedling: First release. Extracted from `levelup` as a stand-alone package ([**@rvagg**](https://github.com/rvagg))
 
+[6.0.0]: https://github.com/Level/leveldown/compare/v5.6.0...v6.0.0
+
 [5.6.0]: https://github.com/Level/leveldown/compare/v5.5.1...v5.6.0
 
 [5.5.1]: https://github.com/Level/leveldown/compare/v5.5.0...v5.5.1
diff --git a/README.md b/README.md
index 5cdef558..7d7521fb 100644
--- a/README.md
+++ b/README.md
@@ -18,12 +18,48 @@
 
 - [Introduction](#introduction)
 - [Supported Platforms](#supported-platforms)
+  - [Notes](#notes)
 - [API](#api)
+  - [`db = leveldown(location)`](#db--leveldownlocation)
+  - [`db.open([options, ]callback)`](#dbopenoptions-callback)
+    - [`options`](#options)
+  - [`db.close(callback)`](#dbclosecallback)
+  - [`db.put(key, value[, options], callback)`](#dbputkey-value-options-callback)
+    - [`options`](#options-1)
+  - [`db.get(key[, options], callback)`](#dbgetkey-options-callback)
+    - [`options`](#options-2)
+  - [`db.del(key[, options], callback)`](#dbdelkey-options-callback)
+    - [`options`](#options-3)
+  - [`db.batch(operations[, options], callback)` _(array form)_](#dbbatchoperations-options-callback-array-form)
+  - [`db.batch()` _(chained form)_](#dbbatch-chained-form)
+  - [`db.approximateSize(start, end, callback)`](#dbapproximatesizestart-end-callback)
+  - [`db.compactRange(start, end, callback)`](#dbcompactrangestart-end-callback)
+  - [`db.getProperty(property)`](#dbgetpropertyproperty)
+  - [`db.iterator([options])`](#dbiteratoroptions)
+  - [`db.clear([options, ]callback)`](#dbclearoptions-callback)
+  - [`chainedBatch`](#chainedbatch)
+    - [`chainedBatch.put(key, value)`](#chainedbatchputkey-value)
+    - [`chainedBatch.del(key)`](#chainedbatchdelkey)
+    - [`chainedBatch.clear()`](#chainedbatchclear)
+    - [`chainedBatch.write([options, ]callback)`](#chainedbatchwriteoptions-callback)
+    - [`chainedBatch.db`](#chainedbatchdb)
+  - [`iterator`](#iterator)
+    - [`iterator.next(callback)`](#iteratornextcallback)
+    - [`iterator.seek(key)`](#iteratorseekkey)
+    - [`iterator.end(callback)`](#iteratorendcallback)
+    - [`iterator.db`](#iteratordb)
+  - [`leveldown.destroy(location, callback)`](#leveldowndestroylocation-callback)
+  - [`leveldown.repair(location, callback)`](#leveldownrepairlocation-callback)
 - [Safety](#safety)
+  - [Database State](#database-state)
 - [Snapshots](#snapshots)
 - [Getting Support](#getting-support)
 - [Contributing](#contributing)
+  - [Git Submodules](#git-submodules)
+  - [Publishing](#publishing)
 - [Donate](#donate)
+  - [Backers](#backers)
+  - [Sponsors](#sponsors)
 - [License](#license)
 
 </details>
diff --git a/UPGRADING.md b/UPGRADING.md
index cce973fb..59abc85c 100644
--- a/UPGRADING.md
+++ b/UPGRADING.md
@@ -2,7 +2,23 @@
 
 This document describes breaking changes and how to upgrade. For a complete list of changes including minor and patch releases, please refer to the [changelog](CHANGELOG.md).
 
-## v5
+## 6.0.0
+
+Legacy range options have been removed ([Level/community#86](https://github.com/Level/community/issues/86)). If you previously did:
+
+```js
+db.iterator({ start: 'a', end: 'z' })
+```
+
+An error would now be thrown and you must instead do:
+
+```js
+db.iterator({ gte: 'a', lte: 'z' })
+```
+
+This release also drops support of Node.js 6 and 8 ([Level/community#98](https://github.com/Level/community/issues/98)).
+
+## 5.0.0
 
 This is a rewrite to N-API - which is a huge milestone, achieved without an impact on write performance - and an upgrade to `abstract-leveldown` v6, which solves long-standing issues around serialization and type support.
 
@@ -58,15 +74,15 @@ db.close(function (err) {
 
 A future release will do the same for other operations like `get` and `batch`.
 
-## v4
+## 4.0.0
 
 Dropped support for node 4. No other breaking changes.
 
-## v3.0.1
+## 3.0.1
 
 If you're using node v10 you'll need at least `leveldown@2.0.1` to successfully compile. In addition, if you want prebuilt binaries you'll need at least `leveldown@3.0.1`.
 
-## v3
+## 3.0.0
 
 #### `.batch(array)` enforces objects
 
diff --git a/appveyor.yml b/appveyor.yml
index 0bccd001..7b26c997 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -35,7 +35,7 @@ deploy:
   - provider: GitHub
     artifact: $(ARCHIVE_NAME)
     auth_token:
-      secure: AjmYV2zeogfen7F6tXvR9PO1zynJVF/jhMCExQ9RMtqEHDMH8Frclym3GniZkEB0
+      secure: Oe6B6Pf/inZ0I5Ta2HVEMg8PAfwi95EtfvTKKMAvFdUPXF//sExugRdATtnMFiwu
     draft: false
     on:
       appveyor_repo_tag: true
diff --git a/package.json b/package.json
index e83d03cb..74324137 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "leveldown",
-  "version": "5.6.0",
+  "version": "6.0.0",
   "description": "A low-level Node.js LevelDB binding",
   "license": "MIT",
   "main": "leveldown.js",