From 5f66486cc254e1483f776d3058f96db493fd26e5 Mon Sep 17 00:00:00 2001
From: Marcel Krems <m.krems@software-vision.eu>
Date: Wed, 21 Feb 2018 19:19:36 +0100
Subject: [PATCH] Fix crash when deleting a QSqlQueryModel after closing the
 database

Task-number: QTBUG-66553
Change-Id: Ib5c04ebe5ac2b7581613e0044804072eb0980b2e
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
---
 src/plugins/sqldrivers/psql/qsql_psql.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/plugins/sqldrivers/psql/qsql_psql.cpp b/src/plugins/sqldrivers/psql/qsql_psql.cpp
index b4eb69e6cf..5e0f7626b4 100644
--- a/src/plugins/sqldrivers/psql/qsql_psql.cpp
+++ b/src/plugins/sqldrivers/psql/qsql_psql.cpp
@@ -462,8 +462,10 @@ void QPSQLResult::cleanup()
     d->result = nullptr;
     while (!d->nextResultSets.isEmpty())
         PQclear(d->nextResultSets.takeFirst());
-    if (d->stmtId != InvalidStatementId)
-        d->drv_d_func()->finishQuery(d->stmtId);
+    if (d->stmtId != InvalidStatementId) {
+        if (d->drv_d_func())
+            d->drv_d_func()->finishQuery(d->stmtId);
+    }
     d->stmtId = InvalidStatementId;
     setAt(QSql::BeforeFirstRow);
     d->currentSize = -1;