Part of the (hopefully) relevant stacktrace:

== Stacktrace =================================
#0  0xb5ad39a6 in ?? () from /lib/arm-linux-gnueabihf/libc.so.6
No symbol table info available.
#1  0xb5ae162e in raise () from /lib/arm-linux-gnueabihf/libc.so.6
No symbol table info available.
#2  0xb5ae2332 in abort () from /lib/arm-linux-gnueabihf/libc.so.6
No symbol table info available.
#3  0xb5d85d34 in QMessageLogger::fatal(char const*, ...) const () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
No symbol table info available.
#4  0xb5d82c26 in qt_assert(char const*, char const*, int) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
No symbol table info available.
#5  0xb3a1b9c0 in Decrypter::fetchDecryptedMessageAction() () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#6  0xb3a1bc1c in Decrypter::fetchDecryptedMessage() () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#7  0xb3a1ca80 in Decrypter::decryptEncryptedData(long long, QByteArray const&) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#8  0xb3a5425a in Telegram::toSecretChatMessage(EncryptedMessage const&) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnuea:
No symbol table info available.
#9  0xb3a5864c in Telegram::processDifferences(long long, QList<Message> const&, QList<EncryptedMessage> const&, QList<Update> const&, QList<Chat> const&, QList<User> const&, UpdatesState const&, bool) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#10 0xb3a58800 in Telegram::onUpdatesDifference(long long, QList<Message> const&, QList<EncryptedMessage> const&, QList<Update> const&, QList<Chat> const&, QList<User> const&, UpdatesState const&) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#11 0xb3a6690e in ?? () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#12 0xb5f15db4 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
No symbol table info available.
#13 0xb3a5fdb8 in Api::updatesDifference(long long, QList<Message> const&, QList<EncryptedMessage> const&, QList<Update> const&, QList<Chat> const&, QList<User> const&, UpdatesState const&) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#14 0xb3a36240 in Api::onUpdatesGetDifferenceAnswer(Query*, InboundPkt&) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#15 0xb3a49746 in AbstractApi::onResultReceived(Query*, InboundPkt&) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#16 0xb3a5d6dc in ?? () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#17 0xb5f15db4 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
No symbol table info available.
#18 0xb3a5c112 in Session::resultReceived(Query*, InboundPkt&) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#19 0xb3a4c18e in Session::queryOnResult(InboundPkt&, long long) () from /opt/click.ubuntu.com/.click/users/@all/com.ubuntu.telegram/lib/arm-linux-gnueabihf/libqtelegram-ae.so.1
No symbol table info available.
#20 0xb3a4c696 in Session::workRpcResult(InboundPkt&, long long) () from /opt/cl: