Test have started to fail randomly on "Exec format error". This has happened on multiple modules, but always on QEMU targets.

Here is an example fail:
agent:2023/08/14 04:36:17 build.go:405: Start 1: tst_qserialport
agent:2023/08/14 04:36:17 build.go:405: 1: Test command: /opt/cmake-3.24.2/bin/cmake "-P" "/home/qt/work/qt/qtserialport_standalone_tests/tests/auto/qserialport/tst_qserialportWrapperRelWithDebInfo.cmake"
agent:2023/08/14 04:36:17 build.go:405: 1: Working Directory: /home/qt/work/qt/qtserialport_standalone_tests/tests/auto/qserialport
agent:2023/08/14 04:36:17 build.go:405: 1: Test timeout computed to be: 1500
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py INFO: Will write XML test logs to directory COIN_CTEST_RESULTSDIR=/home/qt/work/testresults
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py DEBUG: Running test command line: ['/home/qt/work/qt/qtserialport_standalone_tests/tests/auto/qserialport/tst_qserialport', '-o', '/home/qt/work/testresults/tst_qserialport-1691987777190.xml,xml', '-o', '/home/qt/work/testresults/tst_qserialport-1691987777190.junit.xml,junitxml', '-o', '/home/qt/work/testresults/tst_qserialport-1691987777190.txt,txt', '-o', '-,txt']
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py ERROR: exception:OSError [Errno 8] Exec format error: '/home/qt/work/qt/qtserialport_standalone_tests/tests/auto/qserialport/tst_qserialport'
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py ERROR: The test executable probably crashed, see above for details
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py INFO: Will re-run the full test executable
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py DEBUG: Running test command line: ['/home/qt/work/qt/qtserialport_standalone_tests/tests/auto/qserialport/tst_qserialport', '-o', '/home/qt/work/testresults/tst_qserialport-1691987777193.xml,xml', '-o', '/home/qt/work/testresults/tst_qserialport-1691987777193.junit.xml,junitxml', '-o', '/home/qt/work/testresults/tst_qserialport-1691987777193.txt,txt', '-o', '-,txt']
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py ERROR: exception:OSError [Errno 8] Exec format error: '/home/qt/work/qt/qtserialport_standalone_tests/tests/auto/qserialport/tst_qserialport'
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py ERROR: The test executable probably crashed, see above for details
agent:2023/08/14 04:36:17 build.go:405: 1: qt-testrunner.py ERROR: Full test run failed repeatedly, aborting!
agent:2023/08/14 04:36:17 build.go:405: 1: CMake Error at tst_qserialportWrapperRelWithDebInfo.cmake:18 (message):
agent:2023/08/14 04:36:17 build.go:405: 1: /home/qt/work/install/libexec/qt-testrunner.py –
agent:2023/08/14 04:36:17 build.go:405: 1: /home/qt/work/qt/qtserialport_standalone_tests/tests/auto/qserialport/tst_qserialport
agent:2023/08/14 04:36:17 build.go:405: 1: execution failed with exit code 3.

Another example:
https://testresults.qt.io/coin/api/log/qt/qthttpserver/2659d645ac293324af52c1d9273ee27d0325467a/LinuxUbuntu_22_04x86_64LinuxQEMUarmv7GCCqtci-linux-Ubuntu-22.04-x86_64-51-166e66Sccache_UseConfigure/04750a542ed4281aad1f78778914cdb9f7269828/test_1697477772/log.txt.gz