From 17180070f47ecd61629b5486cca87bc4d49a9c74 Mon Sep 17 00:00:00 2001
From: Vitali Zaidman <vzaidman@meta.com>
Date: Mon, 13 Oct 2025 15:10:16 -0400
Subject: [PATCH] fix memory profiling race condition

---
 .../entrypoints/heap_snapshot_worker/HeapSnapshotLoader.ts      | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/front_end/entrypoints/heap_snapshot_worker/HeapSnapshotLoader.ts b/front_end/entrypoints/heap_snapshot_worker/HeapSnapshotLoader.ts
index 9df2099ef44..c74ed17433f 100644
--- a/front_end/entrypoints/heap_snapshot_worker/HeapSnapshotLoader.ts
+++ b/front_end/entrypoints/heap_snapshot_worker/HeapSnapshotLoader.ts
@@ -72,6 +72,8 @@ export class HeapSnapshotLoader {
   }
 
   async buildSnapshot(secondWorker: MessagePort): Promise<JSHeapSnapshot> {
+    await this.parsingComplete;
+
     this.#snapshot = this.#snapshot || {};
 
     this.#progress.updateStatus('Processing snapshot…');