From b7fed9a2e13331f86fbd92d1a82149617ee48712 Mon Sep 17 00:00:00 2001
From: pavelsavara <pavel.savara@gmail.com>
Date: Tue, 3 Jan 2023 23:58:43 +0100
Subject: [PATCH 1/3] fix fail on spread operator

---
 tools/acorn-optimizer.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/acorn-optimizer.js b/tools/acorn-optimizer.js
index 59c5f61b5d601..2171ea728ef73 100755
--- a/tools/acorn-optimizer.js
+++ b/tools/acorn-optimizer.js
@@ -235,6 +235,7 @@ function hasSideEffects(node) {
       case 'VariableDeclarator':
       case 'ObjectExpression':
       case 'Property':
+      case 'SpreadElement':
       case 'BlockStatement':
       case 'ArrayExpression':
       case 'EmptyStatement': {
@@ -399,7 +400,11 @@ function runJSDCE(ast, aggressive) {
       ObjectExpression(node, c) {
         // ignore the property identifiers
         node.properties.forEach(function (node) {
-          c(node.value);
+          if (node.value) {
+            c(node.value);
+          } else if (node.argument) {
+            c(node.argument);
+          }
         });
       },
       MemberExpression(node, c) {

From 29e10ff500096a6d85c2602ccedb33add1ab54bd Mon Sep 17 00:00:00 2001
From: pavelsavara <pavel.savara@gmail.com>
Date: Wed, 4 Jan 2023 18:39:57 +0100
Subject: [PATCH 2/3] run tests on CI

---
 test/optimizer/JSDCE-output.js | 8 ++++++++
 test/optimizer/JSDCE.js        | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/test/optimizer/JSDCE-output.js b/test/optimizer/JSDCE-output.js
index 89c4957f78f3c..833c8339368aa 100644
--- a/test/optimizer/JSDCE-output.js
+++ b/test/optimizer/JSDCE-output.js
@@ -14,6 +14,14 @@ function g(a) {
 
 Module["g"] = g;
 
+const sx = {a:1};
+
+const sar = [1,2,3];
+
+Module['spread'] = { b:2, ...sx };
+
+Module['spread2'] = [ ...sar, 4, 5, 6 ];
+
 function h(a) {
  return a + 1;
 }
diff --git a/test/optimizer/JSDCE.js b/test/optimizer/JSDCE.js
index 9c59e2e1bfb1f..82c64f4773b61 100644
--- a/test/optimizer/JSDCE.js
+++ b/test/optimizer/JSDCE.js
@@ -19,6 +19,10 @@ function g(a) {
   return a+1;
 }
 Module['g'] = g;
+const sx = {a:1};
+const sar = [1,2,3];
+Module['spread'] = { b:2, ...sx };
+Module['spread2'] = [ ...sar, 4, 5, 6 ];
 
 // used
 function h(a) {

From 3edc22731632f8f789b1715644b478323fd05021 Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Wed, 4 Jan 2023 16:01:31 -0800
Subject: [PATCH 3/3] Update test/optimizer/JSDCE-output.js

---
 test/optimizer/JSDCE-output.js | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/test/optimizer/JSDCE-output.js b/test/optimizer/JSDCE-output.js
index 833c8339368aa..480f0396ba8a2 100644
--- a/test/optimizer/JSDCE-output.js
+++ b/test/optimizer/JSDCE-output.js
@@ -14,13 +14,18 @@ function g(a) {
 
 Module["g"] = g;
 
-const sx = {a:1};
+const sx = {
+ a: 1
+};
 
-const sar = [1,2,3];
+const sar = [ 1, 2, 3 ];
 
-Module['spread'] = { b:2, ...sx };
+Module["spread"] = {
+ b: 2,
+ ...sx
+};
 
-Module['spread2'] = [ ...sar, 4, 5, 6 ];
+Module["spread2"] = [ ...sar, 4, 5, 6 ];
 
 function h(a) {
  return a + 1;