From 105c985c71308e439bfeed118fb1ba1eac06824e Mon Sep 17 00:00:00 2001
From: Egor <7gorbachevm@gmail.com>
Date: Sun, 24 May 2026 23:35:33 +0700
Subject: [PATCH 1/2] Avoid Rolldown invalid PURE annotation warnings

Avoid Rolldown invalid PURE annotation warnings
---
 .changeset/clean-rolldown-annotation.md | 5 +++++
 packages/mobx/src/utils/iterable.ts     | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/clean-rolldown-annotation.md

diff --git a/.changeset/clean-rolldown-annotation.md b/.changeset/clean-rolldown-annotation.md
new file mode 100644
index 0000000000..465c991424
--- /dev/null
+++ b/.changeset/clean-rolldown-annotation.md
@@ -0,0 +1,5 @@
+---
+"mobx": patch
+---
+
+Avoid Rolldown invalid PURE annotation warnings from Babel-generated optional chaining output.
diff --git a/packages/mobx/src/utils/iterable.ts b/packages/mobx/src/utils/iterable.ts
index 59463bb475..6e0f678341 100644
--- a/packages/mobx/src/utils/iterable.ts
+++ b/packages/mobx/src/utils/iterable.ts
@@ -1,7 +1,8 @@
 import { getGlobal } from "../internal"
 
 // safely get iterator prototype if available
-const maybeIteratorPrototype = getGlobal().Iterator?.prototype || {}
+const global = getGlobal()
+const maybeIteratorPrototype = global.Iterator?.prototype || {}
 
 export function makeIterable<T, TReturn = unknown>(
     iterator: Iterator<T>

From a373423883c27da3666c9b7a33fced2fa44c6979 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]"
 <41898282+github-actions[bot]@users.noreply.github.com>
Date: Sun, 24 May 2026 23:37:58 +0700
Subject: [PATCH 2/2] Version Packages (#4651)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
---
 .changeset/clean-rolldown-annotation.md | 5 -----
 packages/mobx/CHANGELOG.md              | 6 ++++++
 packages/mobx/package.json              | 2 +-
 3 files changed, 7 insertions(+), 6 deletions(-)
 delete mode 100644 .changeset/clean-rolldown-annotation.md

diff --git a/.changeset/clean-rolldown-annotation.md b/.changeset/clean-rolldown-annotation.md
deleted file mode 100644
index 465c991424..0000000000
--- a/.changeset/clean-rolldown-annotation.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"mobx": patch
----
-
-Avoid Rolldown invalid PURE annotation warnings from Babel-generated optional chaining output.
diff --git a/packages/mobx/CHANGELOG.md b/packages/mobx/CHANGELOG.md
index d39a310535..5825d20f0a 100644
--- a/packages/mobx/CHANGELOG.md
+++ b/packages/mobx/CHANGELOG.md
@@ -1,5 +1,11 @@
 # mobx
 
+## 6.15.4
+
+### Patch Changes
+
+-   [`105c985c71308e439bfeed118fb1ba1eac06824e`](https://github.com/mobxjs/mobx/commit/105c985c71308e439bfeed118fb1ba1eac06824e) [#4650](https://github.com/mobxjs/mobx/pull/4650) Thanks [@kubk](https://github.com/kubk)! - Avoid Rolldown invalid PURE annotation warnings from Babel-generated optional chaining output.
+
 ## 6.15.3
 
 ### Patch Changes
diff --git a/packages/mobx/package.json b/packages/mobx/package.json
index 0821cb65ff..1ba755fce3 100644
--- a/packages/mobx/package.json
+++ b/packages/mobx/package.json
@@ -1,6 +1,6 @@
 {
     "name": "mobx",
-    "version": "6.15.3",
+    "version": "6.15.4",
     "description": "Simple, scalable state management.",
     "source": "src/mobx.ts",
     "main": "dist/index.js",