(lldb) bt
* thread #1, name = 'showfoto', stop reason = signal SIGSEGV: invalid address (fault address: 0x0)
    frame #0: 0x000000080100d5df libdigikamcore.so.6.2.0`::WXMPMeta_RegisterNamespace_1(namespaceURI="http://ns.adobe.com/lightroom/1.0/", suggestedPrefix="lr", registeredPrefix=0x00007fffffffdee0, prefixSize=0x000000080649ad08, wResult=0x0000000000000000) at WXMPMeta.cpp:224:5
    frame #1: 0x00000008063a8358 libexiv2.so.27`TXMPMeta<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::RegisterNamespace(namespaceURI="http://ns.adobe.com/lightroom/1.0/", prefix="lr") at TXMPMeta.incl_cpp:240:2
  * frame #2: 0x00000008063a373f libexiv2.so.27`Exiv2::XmpParser::initialize(xmpLockFct=0x0000000000000000, pLockData=0x0000000000000000)(void*, bool), void*) at xmp.cpp:451:13
    frame #3: 0x0000000800d9ad28 libdigikamcore.so.6.2.0`Digikam::MetaEngine::initializeExiv2() at metaengine.cpp:84:10
    frame #4: 0x00000000002cf99a showfoto`main(argc=1, argv=0x00007fffffffe3f8) at main.cpp:113:5
    frame #5: 0x000000000026c10f showfoto`_start(ap=<unavailable>, cleanup=<unavailable>) at crt1.c:76:7
(lldb) fr sel 0
frame #0: 0x000000080100d5df libdigikamcore.so.6.2.0`::WXMPMeta_RegisterNamespace_1(namespaceURI="http://ns.adobe.com/lightroom/1.0/", suggestedPrefix="lr", registeredPrefix=0x00007fffffffdee0, prefixSize=0x000000080649ad08, wResult=0x0000000000000000) at WXMPMeta.cpp:224:5
   221                                 XMP_StringLen * prefixSize,
   222                                 WXMP_Result *   wResult )
   223  {
-> 224      XMP_ENTER_WRAPPER ( "WXMPMeta_RegisterNamespace_1" )
   225 
   226          if ( (namespaceURI == 0) || (*namespaceURI == 0) ) XMP_Throw ( "Empty namespace URI", kXMPErr_BadSchema );
   227          if ( (suggestedPrefix == 0) || (*suggestedPrefix == 0) ) XMP_Throw ( "Empty suggested prefix", kXMPErr_BadSchema );
(lldb)