From 3ddc3e7cfb96c197c3ad206123b0e6ee67a1532e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jukka=20Jyl=C3=A4nki?= <jujjyl@gmail.com>
Date: Thu, 11 Dec 2025 02:56:55 +0200
Subject: [PATCH] Fix browser.test_fetch_stream_abort_asan race condition by
 avoiding double free of the fetch structure.

---
 test/fetch/test_fetch_stream_abort.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/test/fetch/test_fetch_stream_abort.cpp b/test/fetch/test_fetch_stream_abort.cpp
index ceb7e4cd7c745..47e7d2be180b5 100644
--- a/test/fetch/test_fetch_stream_abort.cpp
+++ b/test/fetch/test_fetch_stream_abort.cpp
@@ -11,6 +11,8 @@
 #include <emscripten/fetch.h>
 #include <emscripten/eventloop.h>
 
+bool fetch_abort_queued = false;
+
 int main() {
   emscripten_fetch_attr_t attr;
   emscripten_fetch_attr_init(&attr);
@@ -32,6 +34,8 @@ int main() {
       fetch->dataOffset,
       fetch->dataOffset + fetch->numBytes);
 
+    if (fetch_abort_queued) return;
+    fetch_abort_queued = true;
     emscripten_set_immediate([](void *arg) {
       emscripten_fetch_t *fetch = (emscripten_fetch_t *)arg;
       printf("Abort fetch when downloading\n");