Fixes a segfault from out of order cleanup of mysql resources.

If a QSqlQuery survived the lifetime of removal of a mysql db connection (that failed), the cleanup code would cause a segfault because it was using an out of date pointer that was pointing at memory that'd been freed by the removeDatabase() call.

Revby: Justin McPherson
Task-number: 205701

1 files changed, 20 insertions, 2 deletions

diff --git a/tests/auto/qsqlquery/tst_qsqlquery.cpp b/tests/auto/qsqlquery/tst_qsqlquery.cpp
index 074f16f..7f97972 100644
--- a/tests/auto/qsqlquery/tst_qsqlquery.cpp
+++ b/tests/auto/qsqlquery/tst_qsqlquery.cpp
@@ -178,9 +178,11 @@ private slots:
     void task_217003_data() { generic_data(); }
     void task_217003();
 #endif
-
     void task_250026_data() { generic_data("QODBC"); }
     void task_250026();
+    void task_205701_data() { generic_data("QMYSQL"); }
+    void task_205701();
+
 
 
 private:
@@ -297,7 +299,7 @@ void tst_QSqlQuery::dropTestTables( QSqlDatabase db )
 #ifdef NOT_READY_YET
     tablenames <<  qTableName( "Planet" );
 #endif
-	tablenames << qTableName( "task_250026" );
+    tablenames << qTableName( "task_250026" );
 
     tst_Databases::safeDropTables( db, tablenames );
 }
@@ -2711,5 +2713,21 @@ void tst_QSqlQuery::task_250026()
 	QCOMPARE( q.value( 0 ).toString().length(), data1026.length() );
 }
 
+void tst_QSqlQuery::task_205701()
+{
+    QSqlDatabase qsdb = QSqlDatabase::addDatabase("QMYSQL", "atest"); 
+    qsdb.setHostName("test"); 
+    qsdb.setDatabaseName("test"); 
+    qsdb.setUserName("test"); 
+    qsdb.setPassword("test"); 
+    qsdb.open(); 
+
+//     {
+        QSqlQuery query(qsdb);
+//     }
+    QSqlDatabase::removeDatabase("atest");
+}
+
+
 QTEST_MAIN( tst_QSqlQuery )
 #include "tst_qsqlquery.moc"