From 5fcfee68af47d4a891ae9c9964d73886f0f01d7d Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Fri, 14 Aug 2020 20:53:35 +0300
Subject: [PATCH] qt: Call setParent() in the parent's context

setParent(parent) calls sendEvent(parent, QChildEvent) that implies
running in the thread which created the parent object.
---
 src/qt/walletcontroller.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/qt/walletcontroller.cpp b/src/qt/walletcontroller.cpp
index d9e0274d01b54..a59f33b785f18 100644
--- a/src/qt/walletcontroller.cpp
+++ b/src/qt/walletcontroller.cpp
@@ -131,7 +131,11 @@ WalletModel* WalletController::getOrCreateWallet(std::unique_ptr<interfaces::Wal
     WalletModel* wallet_model = new WalletModel(std::move(wallet), m_client_model, m_platform_style, nullptr);
     // Handler callback runs in a different thread so fix wallet model thread affinity.
     wallet_model->moveToThread(thread());
-    wallet_model->setParent(this);
+    // setParent(parent) must be called in the thread which created the parent object. More details in #18948.
+    GUIUtil::ObjectInvoke(this, [wallet_model, this] {
+        wallet_model->setParent(this);
+    }, GUIUtil::blockingGUIThreadConnection());
+
     m_wallets.push_back(wallet_model);
 
     // WalletModel::startPollBalance needs to be called in a thread managed by