From fa0f14ef5e76424ed7770936f7d053f27336a601 Mon Sep 17 00:00:00 2001
From: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>
Date: Wed, 2 Sep 2026 13:22:08 +0200
Subject: [PATCH] test: Avoid unsafe memory race in index_reorg_crash shutdown

Without the drain, a BlockConnected event may execute during shutdown
and lead to memory races.
---
 src/test/baseindex_tests.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/test/baseindex_tests.cpp b/src/test/baseindex_tests.cpp
index 68907ad28d8..63f3c912f2a 100644
--- a/src/test/baseindex_tests.cpp
+++ b/src/test/baseindex_tests.cpp
@@ -230,6 +230,10 @@ BOOST_FIXTURE_TEST_CASE(index_reorg_crash, TestChain100Setup)
     promise.set_value();
     // Wait for the index to reach the new tip
     func_wait_until(blocking_height + 2, 5s);
+
+    // Drain unused BlockConnected events, to avoid unsafe memory races during destruction
+    m_node.chain->context()->validation_signals->SyncWithValidationInterfaceQueue();
+    // shutdown sequence (c.f. Shutdown() in init.cpp)
     index.Stop();
 }