tst_qsqlthread fails non-deterministically on powerpc64le

********* Start testing of tst_QSqlThread *********
Config: Using QtTest library 6.5.2, Qt 6.5.2 (power64-little_endian-lp64 shared (dynamic) release build; by GCC 11.3.0), unknown unknown
QINFO  : tst_QSqlThread::initTestCase() SQLite will use the database located at /tmp/guix-build-qtbase-6.5.2.drv-0/tst_qsqlthread-vpCdBx/sqlite.db
QDEBUG : tst_QSqlThread::initTestCase() Opening: "SQLite"
PASS   : tst_QSqlThread::initTestCase()
QDEBUG : tst_QSqlThread::simpleThreading(SQLite) Thread finished, total finished: 1
QDEBUG : tst_QSqlThread::simpleThreading(SQLite) Thread finished, total finished: 2
PASS   : tst_QSqlThread::simpleThreading(SQLite)
QWARN  : tst_QSqlThread::readWriteThreading(SQLite) QObject: Cannot create children for a parent that is in a different thread.
(Parent is QCoreApplication(0x7fffffff3c40), parent's thread is QThread(0x100083a50), current thread is SqlConsumer(0x7fffffff30a8)
FAIL!  : tst_QSqlThread::readWriteThreading(SQLite) '(q2).exec()' returned FALSE. (QSQLITE@: (5) 'Unable to fetch row' || 'database is locked')
   Loc: [/tmp/guix-build-qtbase-6.5.2.drv-0/qtbase-everywhere-src-6.5.2/tests/auto/sql/kernel/qsqlthread/tst_qsqlthread.cpp(157)]
QDEBUG : tst_QSqlThread::readWriteThreading(SQLite) Thread finished, total finished: 1
FAIL!  : tst_QSqlThread::readWriteThreading(SQLite) 'threadFinishedCount >= 2' returned FALSE. ()
   Loc: [/tmp/guix-build-qtbase-6.5.2.drv-0/qtbase-everywhere-src-6.5.2/tests/auto/sql/kernel/qsqlthread/tst_qsqlthread.cpp(378)]
QFATAL : tst_QSqlThread::readWriteThreading(SQLite) QThread: Destroyed while thread is still running
FAIL!  : tst_QSqlThread::readWriteThreading(SQLite) Received a fatal error.
Totals: 2 passed, 1 failed, 0 skipped, 0 blacklisted, 36625ms
********* Finished testing of tst_QSqlThread *********
Received signal 6 (SIGABRT)
         readWriteThreading function time: 5045ms, total time: 36625ms
CMake Error at tst_qsqlthreadWrapperRelWithDebInfo.cmake:18 (message):
  
  /tmp/guix-build-qtbase-6.5.2.drv-0/build/tests/auto/sql/kernel/qsqlthread/tst_qsqlthread
  execution failed with exit code Subprocess aborted.