(gdb) bt
#0  0x008c7402 in __kernel_vsyscall ()
#1  0x0090df90 in raise () from /lib/libc.so.6
#2  0x0090f678 in abort () from /lib/libc.so.6
#3  0x0805f3cd in Fluxbox::handleSignal (this=0x8a929f0, signum=11)
    at fluxbox.cc:1174
#4  0x0811fbe2 in FbTk::SignalHandler::handleSignal (signum=11)
    at SignalHandler.cc:77
#5  <signal handler called>
#6  ClientPattern::equals (this=0x8aac850, pat=@0x8aacbb0)
    at /usr/lib/gcc/i386-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/basic_string.h:586
#7  0x080e1234 in Remember::findMatchingPatterns (this=0x8a9ecc0, 
    pat=0x8aacbb0, patlist=0x8aa6b58, is_group=false) at Remember.cc:487
#8  0x080e3664 in Remember::reconfigure (this=0x8a9ecc0) at Remember.cc:556
#9  0x080e5125 in Remember::updateClientClose (this=0x8a9ecc0, 
    winclient=@0x8b87a58) at Remember.cc:1066
#10 0x0805bfd5 in Fluxbox::update (this=0x8a929f0, changedsub=0x8b87b50)
    at fluxbox.cc:1292
#11 0x08130bb0 in std::for_each<std::_List_iterator<FbTk::Observer*>, std::binder2nd<std::mem_fun1_t<void, FbTk::Observer, FbTk::Subject*> > > (__first=
      {_M_node = 0x8b869c0}, __last={_M_node = 0x8b87b58}, __f=
      {<std::unary_function<FbTk::Observer*,void>> = {<No data fields>}, op = {<std::binary_function<FbTk::Observer*,FbTk::Subject*,void>> = {<No data fields>}, _M_f = {__pfn = 0x9, __delta = 0}}, value = 0x8b87b50})
    at /usr/lib/gcc/i386-redhat-linux/4.0.2/../../../../include/c++/4.0.2/bits/stl_function.h:792
#12 0x08130682 in FbTk::Subject::notify (this=0x8b87b50) at Subject.cc:63
#13 0x080baef4 in ~WinClient (this=0x8b87a58) at WinClient.cc:117
#14 0x080aa7e3 in FluxboxWindow::restore (this=0x8b92400, client=0x8b87a58, 
    remap=false) at Window.cc:3720
#15 0x080aaae6 in FluxboxWindow::unmapNotifyEvent (this=0x8b92400, 
    ue=@0xbfb5138c) at Window.cc:2517
#16 0x0805b58a in Fluxbox::handleUnmapNotify (this=0x8a929f0, ue=@0xbfb5138c)
    at fluxbox.cc:990
#17 0x0805cdbd in Fluxbox::handleEvent (this=0x8a929f0, e=0xbfb5138c)
    at fluxbox.cc:778
#18 0x0805d368 in Fluxbox::eventLoop (this=0x8a929f0) at fluxbox.cc:536
#19 0x08073a75 in main (argc=3, argv=0xbfb51654) at main.cc:278
(gdb)