(gdb) run
Starting program: /home/mb/develop/git/bitcoin/src/qt/bitcoin-qt 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffefa22700 (LWP 3456)]
[New Thread 0x7fffe7020700 (LWP 3457)]
^C
Thread 1 "bitcoin-qt" received signal SIGINT, Interrupt.
syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
38      ../sysdeps/unix/sysv/linux/x86_64/syscall.S: No such file or directory.
(gdb) bt
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff5e26d2f in __cxa_guard_acquire () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2  0x00007ffff7e06dcc in (anonymous namespace)::Q_QGS_globalData::innerFunction () at ssl/qsslsocket.cpp:346
#3  QGlobalStatic<QSslSocketGlobalData, (anonymous namespace)::Q_QGS_globalData::innerFunction, (anonymous namespace)::Q_QGS_globalData::guard>::operator() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qglobalstatic.h:135
#4  0x00007ffff7e0b706 in QSslSocketPrivate::setDefaultSupportedCiphers(QList<QSslCipher> const&) () at ssl/qsslsocket.cpp:2123
#5  0x00007ffff7e2af21 in QSslSocketPrivate::resetDefaultCiphers () at ssl/qsslsocket_openssl.cpp:471
#6  0x00007ffff7e32080 in QSslSocketPrivate::ensureCiphersAndCertsLoaded () at ssl/qsslsocket_openssl11.cpp:120
#7  0x00007ffff7df1c67 in QSslCertificatePrivate::QSslCertificatePrivate (this=0x55555632f230) at ssl/qsslcertificate_p.h:86
#8  QSslCertificate::QSslCertificate (this=0x555556316878, data=..., format=QSsl::Pem) at ssl/qsslcertificate.cpp:157
#9  0x00007ffff7e07fe6 in QSslConfigurationPrivate::QSslConfigurationPrivate (this=0x555556316870)
    at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:255
#10 QSslSocketGlobalData::QSslSocketGlobalData (this=0x7ffff7e90c80 <(anonymous namespace)::Q_QGS_globalData::innerFunction()::holder>)
    at ssl/qsslsocket.cpp:339
#11 (anonymous namespace)::Q_QGS_globalData::Holder::Holder (
    this=0x7ffff7e90c80 <(anonymous namespace)::Q_QGS_globalData::innerFunction()::holder>) at ssl/qsslsocket.cpp:346
#12 (anonymous namespace)::Q_QGS_globalData::innerFunction () at ssl/qsslsocket.cpp:346
#13 QGlobalStatic<QSslSocketGlobalData, (anonymous namespace)::Q_QGS_globalData::innerFunction, (anonymous namespace)::Q_QGS_globalData::guard>::operator() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qglobalstatic.h:135
#14 QSslConfigurationPrivate::defaultConfiguration() () at ssl/qsslsocket.cpp:2217
#15 0x00007ffff7dfb09d in QSslConfiguration::defaultConfiguration () at ssl/qsslconfiguration.cpp:1018
#16 0x000055555564841f in main () at qt/bitcoin.cpp:579
#17 0x00007ffff5a49b17 in __libc_start_main (main=0x555555648380 <main>, argc=1, argv=0x7fffffffdcc8, init=<optimized out>, 
    fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffdcb8) at ../csu/libc-start.c:310
#18 0x0000555555657dca in _start () at /usr/include/c++/8/ext/new_allocator.h:116