From 736ecba509eab5698ce875fe76e9b595535fe282 Mon Sep 17 00:00:00 2001
From: TrickyPi <530257315@qq.com>
Date: Sun, 23 Apr 2023 20:03:38 +0800
Subject: [PATCH] fix: mark Map is impure

---
 src/ast/nodes/shared/knownGlobals.ts                 |  2 +-
 .../samples/tree-shake-map-constructor/_config.js    |  4 ++++
 .../samples/tree-shake-map-constructor/main.js       | 12 ++++++++++++
 3 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 test/function/samples/tree-shake-map-constructor/_config.js
 create mode 100644 test/function/samples/tree-shake-map-constructor/main.js

diff --git a/src/ast/nodes/shared/knownGlobals.ts b/src/ast/nodes/shared/knownGlobals.ts
index 21d4e751af2..34b21ca9eb4 100644
--- a/src/ast/nodes/shared/knownGlobals.ts
+++ b/src/ast/nodes/shared/knownGlobals.ts
@@ -164,7 +164,7 @@ const knownGlobals: GlobalDescription = {
 	isNaN: PF,
 	isPrototypeOf: O,
 	JSON: O,
-	Map: PC,
+	Map: C,
 	Math: {
 		__proto__: null,
 		[ValueProperties]: IMPURE,
diff --git a/test/function/samples/tree-shake-map-constructor/_config.js b/test/function/samples/tree-shake-map-constructor/_config.js
new file mode 100644
index 00000000000..1de38a64953
--- /dev/null
+++ b/test/function/samples/tree-shake-map-constructor/_config.js
@@ -0,0 +1,4 @@
+module.exports = {
+	description:
+		'Retain the Map constructor is called with the new keyword if the accepted param has side effects'
+};
diff --git a/test/function/samples/tree-shake-map-constructor/main.js b/test/function/samples/tree-shake-map-constructor/main.js
new file mode 100644
index 00000000000..f088c82c32f
--- /dev/null
+++ b/test/function/samples/tree-shake-map-constructor/main.js
@@ -0,0 +1,12 @@
+assert.ok(
+	new Map({
+		[Symbol.iterator]() {
+			return {
+				next() {
+					console.log('side effect');
+					return { done: true };
+				}
+			};
+		}
+	})
+);