From eedf4b50f6f30b60dacbd4d218759045d54fb4d5 Mon Sep 17 00:00:00 2001
From: claude <claude@verso>
Date: Fri, 19 Jun 2026 15:22:56 +0000
Subject: [PATCH] fix(typst-preview): use RenderByContentOptions to avoid Rust
 aliasing
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Replace runWithSession + manipulateData + session.renderToSvg with the
direct RenderByContentOptions form: renderer.renderToSvg({ format: 'vector',
artifactContent, container }).

The session-based API kept hitting 'recursive use of an object detected
which would lead to unsafe aliasing in rust' because runWithSession holds
a mutable borrow of the session while renderToSvg also takes one —
regardless of whether you call renderer.renderToSvg({ renderSession }) or
session.renderToSvg(). The content-based form creates and disposes the
session internally without any caller-visible borrow.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 .../typst-preview/components/typst-wasm-preview.tsx   | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/services/web/frontend/js/features/typst-preview/components/typst-wasm-preview.tsx b/services/web/frontend/js/features/typst-preview/components/typst-wasm-preview.tsx
index aab70b3dc5..4d830e27b7 100644
--- a/services/web/frontend/js/features/typst-preview/components/typst-wasm-preview.tsx
+++ b/services/web/frontend/js/features/typst-preview/components/typst-wasm-preview.tsx
@@ -71,11 +71,12 @@ const TypstWasmPreview: FC = () => {
       dataToRender = null
 
       try {
-        await renderer.runWithSession(async session => {
-          session.manipulateData({ action: 'reset', data })
-          // Use session.renderToSvg (NOT renderer.renderToSvg with renderSession)
-          // to avoid double-aliasing the same Rust object inside runWithSession
-          await session.renderToSvg({ container })
+        // Use RenderByContentOptions: pass artifactContent directly instead of
+        // using runWithSession + manipulateData, which causes Rust aliasing errors
+        await renderer.renderToSvg({
+          format: 'vector',
+          artifactContent: data,
+          container,
         })
         pendingVectorRef.current = null
         setStatus('ready')