tst_xmlpatterns on Ubuntu 20.04 armv7 target, kills all user processes (including Coin or the ssh session)

qt@10-215-100-167:~$ export QEMU_LD_PREFIX=/opt/yocto-armv7/sysroots/armv7at2hf-neon-poky-linux-gnueabi
qt@10-215-100-167:~$ cd /home/qt/work/qt/qtxmlpatterns/tests/auto/xmlpatterns
qt@10-215-100-167:~/work/qt/qtxmlpatterns/tests/auto/xmlpatterns$ make -j1 check
/home/qt/work/qt/qtxmlpatterns/tests/auto/xmlpatterns/target_wrapper.sh  ./tst_xmlpatterns
********* Start testing of tst_XmlPatterns *********
Config: Using QtTest library 6.0.0, Qt 6.0.0 (arm-little_endian-ilp32-eabi-hardfloat shared (dynamic) release build; by GCC 8.3.0)
SKIP   : tst_XmlPatterns::initTestCase() The command line tool (/home/qt/work/install/bin/xmlpatterns) could not be run, possibly because Qt was incompletely built or installed. No tests will be run.
   Loc: [tst_xmlpatterns.cpp(112)]
QWARN  : tst_XmlPatterns::initTestCase() QProcess: Destroyed while process ("/home/qt/work/install/bin/xmlpatterns") is still running.
Connection to 10.215.100.167 closed by remote host.
Connection to 10.215.100.167 closed.

********* Start testing of tst_XmlPatterns *********
Config: Using QtTest library 6.0.0, Qt 6.0.0 (arm-little_endian-ilp32-eabi-hardfloat shared (dynamic) release build; by GCC 8.3.0)
INFO   : tst_XmlPatterns::initTestCase() entering
INFO   : tst_XmlPatterns::initTestCase() QVERIFY(m_normalizeTestName.isValid())
   Loc: [tst_xmlpatterns.cpp(98)]
SKIP   : tst_XmlPatterns::initTestCase() The command line tool (/home/qt/work/install/bin/xmlpatterns) could not be run, possibly because Qt was incompletely built or installed. No tests will be run.
   Loc: [tst_xmlpatterns.cpp(112)]
QWARN  : tst_XmlPatterns::initTestCase() QProcess: Destroyed while process ("/home/qt/work/install/bin/xmlpatterns") is still running.
Connection to 10.215.100.167 closed by remote host.
Connection to 10.215.100.167 closed.

$ ./tst_xmlpatterns -v2 -vs
********* Start testing of tst_XmlPatterns *********
Config: Using QtTest library 6.0.0, Qt 6.0.0 (arm-little_endian-ilp32-eabi-hardfloat shared (dynamic) release build; by GCC 8.3.0)
INFO   : tst_XmlPatterns::initTestCase() entering
INFO   : tst_XmlPatterns::initTestCase() Signal: QThread(f3a87e00) started ()
INFO   : tst_XmlPatterns::initTestCase() QVERIFY(m_normalizeTestName.isValid())
   Loc: [tst_xmlpatterns.cpp(98)]
INFO   : tst_XmlPatterns::initTestCase() Signal: QProcess(f6fda714) stateChanged ()
INFO   : tst_XmlPatterns::initTestCase() Signal: QProcess(f6fda714) stateChanged ()
INFO   : tst_XmlPatterns::initTestCase() Signal: QProcess(f6fda714) started ()

[ ... hanging for 30s ... ]

SKIP   : tst_XmlPatterns::initTestCase() The command line tool (/home/qt/work/install/bin/xmlpatterns) could not be run, possibly because Qt was incompletely built or installed. No tests will be run.
   Loc: [tst_xmlpatterns.cpp(112)]
QWARN  : tst_XmlPatterns::initTestCase() QProcess: Destroyed while process ("/home/qt/work/install/bin/xmlpatterns") is still running.
Connection to 10.215.103.239 closed by remote host.
Connection to 10.215.103.239 closed

qt@10-215-100-167:~$ export QEMU_LD_PREFIX=/opt/yocto-armv7/sysroots/armv7at2hf-neon-poky-linux-gnueabi
qt@10-215-100-167:~$ cd /home/qt/work/qt/qtxmlpatterns/tests/auto/xmlpatterns

qt@10-215-100-167:~/work/qt/qtxmlpatterns/tests/auto/xmlpatterns$ strace -t -s 512 -o strace.log ./tst_xmlpatterns
********* Start testing of tst_XmlPatterns *********
Config: Using QtTest library 6.0.0, Qt 6.0.0 (arm-little_endian-ilp32-eabi-hardfloat shared (dynamic) release build; by GCC 8.3.0)
SKIP   : tst_XmlPatterns::initTestCase() The command line tool (/home/qt/work/install/bin/xmlpatterns) could not be run, possibly because Qt was incompletely built or installed. No tests will be run.
   Loc: [tst_xmlpatterns.cpp(112)]
QWARN  : tst_XmlPatterns::initTestCase() QProcess: Destroyed while process ("/home/qt/work/install/bin/xmlpatterns") is still running.
Connection to 10.215.100.167 closed by remote host.
Connection to 10.215.100.167 closed.

 13:16:35 clock_gettime(CLOCK_MONOTONIC, {tv_sec=165851, tv_nsec=350269750}) = 0
13:16:35 clock_gettime(CLOCK_MONOTONIC, {tv_sec=165851, tv_nsec=350344863}) = 0
13:16:35 ppoll([{fd=-1}, {fd=-1}, {fd=-1}, {fd=0, events=POLLIN}], 4, {tv_sec=29, tv_nsec=998000000}, NULL, 8) = 0 (Timeout)
13:17:05 write(1, "SKIP   : tst_XmlPatterns::initTestCase() The command line tool (/home/qt/work/install/bin/xmlpatterns) could not be run, possibly because Qt was incompletely built or installed. No tests will be run.\n   Loc: [tst_xmlpatterns.cpp(112)]\n", 235) = 235
13:17:05 openat(AT_FDCWD, "/home/qt/work/install/qtlogging.ini", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
13:17:05 newfstatat(AT_FDCWD, "/home/qt/.config/QtProject/qtlogging.ini", 0x7ffe72852360, 0) = -1 ENOENT (No such file or directory)
13:17:05 newfstatat(AT_FDCWD, "/etc/xdg/QtProject/qtlogging.ini", 0x7ffe72852360, 0) = -1 ENOENT (No such file or directory)
13:17:05 clock_gettime(CLOCK_MONOTONIC, {tv_sec=165881, tv_nsec=390698124}) = 0
13:17:05 write(1, "QWARN  : tst_XmlPatterns::initTestCase() QProcess: Destroyed while process (\"/home/qt/work/install/bin/xmlpatterns\") is still running.\n", 135) = 135
13:17:05 kill(-1, SIGKILL
(END)