From b7c9b279bb1e47434494655745b5e4076caffcf5 Mon Sep 17 00:00:00 2001
From: Bacra <bacra.woo@gmail.com>
Date: Wed, 14 Nov 2018 20:55:45 +0800
Subject: [PATCH 1/2] Fix lint err

---
 lib/esshorten.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/esshorten.js b/lib/esshorten.js
index 1fb2f9f..60753ff 100644
--- a/lib/esshorten.js
+++ b/lib/esshorten.js
@@ -89,7 +89,7 @@
         let generator = new NameGenerator(scope, options);
         let prefix = options.renamePrefix;
 
-        const shouldRename = options && options.shouldRename || () => true;
+        const shouldRename = options && options.shouldRename || (() => true);
 
         if (scope.isStatic()) {
             let name = '9';

From cc5e0b566f7a14ae526506161321e2bbd6b44348 Mon Sep 17 00:00:00 2001
From: Bacra <bacra.woo@gmail.com>
Date: Thu, 15 Nov 2018 15:03:25 +0800
Subject: [PATCH 2/2] Get same result of sort between node8 and node11

---
 .travis.yml        | 6 ++++--
 lib/esshorten.js   | 9 ++++++++-
 test/mangle.coffee | 8 ++++++++
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 1b8b5f4..03e14bf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,7 @@
 sudo: false
 language: node_js
 node_js:
-  - "5"
-  - "4"
+  - "6"
+  - "8"
+  - "10"
+  - "11"
diff --git a/lib/esshorten.js b/lib/esshorten.js
index 60753ff..63a5d71 100644
--- a/lib/esshorten.js
+++ b/lib/esshorten.js
@@ -93,6 +93,11 @@
 
         if (scope.isStatic()) {
             let name = '9';
+            let variableIndexMap = new Map();
+
+            scope.variables.forEach((variable, index) => {
+                variableIndexMap.set(variable, index);
+            });
 
             scope.variables.sort((a, b) => {
                 if (a.tainted) {
@@ -101,7 +106,9 @@
                 if (b.tainted) {
                     return -1;
                 }
-                return (b.identifiers.length + b.references.length) - (a.identifiers.length + a.references.length);
+
+                let diff = (b.identifiers.length + b.references.length) - (a.identifiers.length + a.references.length);
+                return diff === 0 ? variableIndexMap.get(a) - variableIndexMap.get(b) : diff;
             });
 
             for (let variable of scope.variables) {
diff --git a/test/mangle.coffee b/test/mangle.coffee
index 33347c7..576a893 100644
--- a/test/mangle.coffee
+++ b/test/mangle.coffee
@@ -79,6 +79,14 @@ describe 'mangle:', ->
             expect(f.params[0].name).not.to.equal a.body.body[0].expression.name
             expect(a.id.name).not.to.equal a.body.body[0].expression.name
 
+        it 'sort for node11', ->
+            program = esprima.parse 'function f(a1, a2, a3, a4, a5) { var b1, b2, b3, b4, b5 }'
+
+            result = esshorten.mangle program
+            expect(result.body[0].params[0].name).to.equal 'a'
+            expect(result.body[0].body.body[0].declarations[0].id.name).to.equal 'f'
+
+
     describe 'nested scope handling:', ->
         it 'shortens nested function names', ->
             program = esprima.parse 'function f() { function g() {} }'