From c293017ce15f7a1ec91c443d38bd0722d45809c8 Mon Sep 17 00:00:00 2001
From: Cody Olsen <stipsan@gmail.com>
Date: Mon, 15 Sep 2025 15:25:16 +0200
Subject: [PATCH] [compiler]: add `@tanstack/react-virtual` to known
 incompatible libraries

---
 .../src/HIR/DefaultModuleTypeProvider.ts       | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/compiler/packages/babel-plugin-react-compiler/src/HIR/DefaultModuleTypeProvider.ts b/compiler/packages/babel-plugin-react-compiler/src/HIR/DefaultModuleTypeProvider.ts
index 3b3e120f39076..106fce615c44e 100644
--- a/compiler/packages/babel-plugin-react-compiler/src/HIR/DefaultModuleTypeProvider.ts
+++ b/compiler/packages/babel-plugin-react-compiler/src/HIR/DefaultModuleTypeProvider.ts
@@ -86,6 +86,24 @@ export function defaultModuleTypeProvider(
         },
       };
     }
+    case '@tanstack/react-virtual': {
+      return {
+        kind: 'object',
+        properties: {
+          /*
+           * Many of the properties of `useVirtualizer()`'s return value are incompatible, so we mark the entire hook
+           * as incompatible
+           */
+          useVirtualizer: {
+            kind: 'hook',
+            positionalParams: [],
+            restParam: Effect.Read,
+            returnType: {kind: 'type', name: 'Any'},
+            knownIncompatible: `TanStack Virtual's \`useVirtualizer()\` API returns functions that cannot be memoized safely`,
+          },
+        },
+      };
+    }
   }
   return null;
 }