strace does not yield anything, so probably no systemcalls are done.

(gdb) bt
#0  0x0e693518 in __tzstring () from /lib/libc.so.6
#1  0x0e694768 in __tzfile_compute () from /lib/libc.so.6
#2  0x0e694118 in __tz_convert () from /lib/libc.so.6
#3  0x0e6921cc in localtime_r () from /lib/libc.so.6
#4  0x0f37a048 in QTime::currentTime () from /usr/lib/libQtCore.so.4
#5  0x0f37a210 in QTime::start () from /usr/lib/libQtCore.so.4
#6  0x0e19882c in QSslSocket::waitForReadyRead ()
   from /usr/lib/libQtNetwork.so.4
#7  0x0f75dfbc in KTcpSocket::waitForReadyRead ()
   from /usr/lib/libkdecore.so.5
#8  0x0fe45764 in KIO::TCPSlaveBase::readLine () from /usr/lib/libkio.so.5
#9  0x0d5ed964 in ?? () from /usr/lib/kde4/kio_sieve.so
#10 0x0d5ede94 in ?? () from /usr/lib/kde4/kio_sieve.so
#11 0x0d5ed7f8 in ?? () from /usr/lib/kde4/kio_sieve.so
#12 0x0d5f2cac in ?? () from /usr/lib/kde4/kio_sieve.so
#13 0x0d5f2f88 in ?? () from /usr/lib/kde4/kio_sieve.so
#14 0x0fe35aa0 in KIO::SlaveBase::dispatch () from /usr/lib/libkio.so.5
#15 0x0fe3b5dc in KIO::SlaveBase::dispatchLoop () from /usr/lib/libkio.so.5
#16 0x0d5f5834 in kdemain () from /usr/lib/kde4/kio_sieve.so
#17 0x10006fec in ?? ()
#18 0x100076c8 in ?? ()
#19 0x10007d58 in ?? ()
#20 0x10008cb8 in ?? ()
#21 0x0e613704 in generic_start_main () from /lib/libc.so.6
#22 0x0e6138c0 in __libc_start_main () from /lib/libc.so.6
#23 0x00000000 in ?? ()

^C
Program received signal SIGINT, Interrupt.
0x0e6934dc in __tzstring () from /lib/libc.so.6
(gdb) bt
#0  0x0e6934dc in __tzstring () from /lib/libc.so.6
#1  0x0e694700 in __tzfile_compute () from /lib/libc.so.6
#2  0x0e694118 in __tz_convert () from /lib/libc.so.6
#3  0x0e6921cc in localtime_r () from /lib/libc.so.6
#4  0x0f37a048 in QTime::currentTime () from /usr/lib/libQtCore.so.4
#5  0x0f37a128 in QTime::elapsed () from /usr/lib/libQtCore.so.4
#6  0x0e198944 in QSslSocket::waitForReadyRead ()
   from /usr/lib/libQtNetwork.so.4
#7  0x0f75dfbc in KTcpSocket::waitForReadyRead ()
   from /usr/lib/libkdecore.so.5
#8  0x0fe45764 in KIO::TCPSlaveBase::readLine () from /usr/lib/libkio.so.5
#9  0x0d5ed964 in ?? () from /usr/lib/kde4/kio_sieve.so
#10 0x0d5ede94 in ?? () from /usr/lib/kde4/kio_sieve.so
#11 0x0d5ed7f8 in ?? () from /usr/lib/kde4/kio_sieve.so
#12 0x0d5f2cac in ?? () from /usr/lib/kde4/kio_sieve.so
#13 0x0d5f2f88 in ?? () from /usr/lib/kde4/kio_sieve.so
#14 0x0fe35aa0 in KIO::SlaveBase::dispatch () from /usr/lib/libkio.so.5
#15 0x0fe3b5dc in KIO::SlaveBase::dispatchLoop () from /usr/lib/libkio.so.5
#16 0x0d5f5834 in kdemain () from /usr/lib/kde4/kio_sieve.so
#17 0x10006fec in ?? ()
#18 0x100076c8 in ?? ()
#19 0x10007d58 in ?? ()
#20 0x10008cb8 in ?? ()
#21 0x0e613704 in generic_start_main () from /lib/libc.so.6
#22 0x0e6138c0 in __libc_start_main () from /lib/libc.so.6
#23 0x00000000 in ?? ()
(gdb)