From d03482e084b8d551a3ab15d8f16b32615a707399 Mon Sep 17 00:00:00 2001
From: Matt Perry <mattgperry@gmail.com>
Date: Thu, 28 May 2026 10:59:11 +0200
Subject: [PATCH] Fix Turbopack OOM by avoiding duplicate-source re-export in
 motion/react
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The previous `motion/src/react.ts` had two re-export statements pulling
from the same module:

    export { motion, m } from "framer-motion"
    export * from "framer-motion"

When compiled to ESM and loaded by Next.js 16's Turbopack on Windows,
this duplicate-source pattern caused the dev server to OOM during
module-graph analysis (#3741). Importing `framer-motion` directly worked
fine, since framer-motion's own index never re-exports from the same
source twice.

Switching to an `import * as fm from "framer-motion"` + `const` alias
keeps the explicit `motion`/`m` exports that IDE auto-import relies on
(#3432) without the duplicate-source pattern. Per the ES spec, local
declarations shadow the names from `export * from "framer-motion"`, so
the compiled output now has a single wildcard re-export plus two local
const bindings — a shape Turbopack handles cleanly.

Fixes #3741

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
---
 packages/motion/src/react.ts | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/packages/motion/src/react.ts b/packages/motion/src/react.ts
index d0ba2f67b6..68ad2f648a 100644
--- a/packages/motion/src/react.ts
+++ b/packages/motion/src/react.ts
@@ -1,3 +1,16 @@
-// Explicit named exports for better IDE auto-import support
-export { motion, m } from "framer-motion"
+// Re-export everything from framer-motion.
+//
+// `motion` and `m` are aliased through local bindings so the module has
+// explicit named exports for IDE auto-import (see #3432). The previous
+// `export { motion, m } from "framer-motion"` line — sitting alongside
+// `export * from "framer-motion"` — was a duplicate-source re-export pattern
+// that caused Next.js Turbopack to OOM during module-graph analysis (#3741).
+// Local declarations shadow the wildcard re-export per the ES spec, so
+// `motion` and `m` come from the explicit bindings below and the rest from
+// `export *`.
+import * as fm from "framer-motion"
+
+export const motion: typeof fm.motion = fm.motion
+export const m: typeof fm.m = fm.m
+
 export * from "framer-motion"