Akregator started reliably crashing when reading articles on arstechnica.com.  The crash happens after some time when opening the article in a new tab.

Reproducible: Always

Steps to Reproduce:
1. Open an article from arstechnica.com in a new tab.
2. Wait some time.

Actual Results:  
Akregator crashes

Expected Results:  
Akregator does not crash :-)

The program crashes in the following function:

Program received signal SIGSEGV, Segmentation fault.
KJS::UString::Rep::computeHash (s=0x7f01a433c0b8 "[[NodeConstructor.constructor]]")
    at ../../kjs/ustring.cpp:325

It seems that KJS is involved, I will try to file a bug against it.

The backtrace is huge (93 Mb), the relevant parts (top and bottom) are given below.
I will try to attach the full bzipped backtrace. 

top:

#0  KJS::UString::Rep::computeHash (s=0x7f01a433c0b8 "[[NodeConstructor.constructor]]") at ../../kjs/ustring.cpp:325
#1  0x00007f019da63538 in hash (c=0x7f01a433c0b8 "[[NodeConstructor.constructor]]") at ../../kjs/identifier.cpp:67
#2  hash (key=<optimized out>) at ../../kjs/wtf/HashSet.h:105
#3  fullLookupForWriting<char const*, WTF::HashSetTranslatorAdapter<KJS::UString::Rep*, WTF::HashTraits<KJS::UString::Rep*>, char const*, KJS::CStringTranslator> > (key=<synthetic pointer>, this=0x25cd540) at ../../kjs/wtf/HashTable.h:564
#4  addPassingHashCode<char const*, char const*, WTF::HashSetTranslatorAdapter<KJS::UString::Rep*, WTF::HashTraits<KJS::UString::Rep*>, char const*, KJS::CStringTranslator> > (extra=<synthetic pointer>, key=<synthetic pointer>, this=0x25cd540) at ../../kjs/wtf/HashTable.h:702
#5  add<char const*, KJS::CStringTranslator> (value=<synthetic pointer>, this=<optimized out>) at ../../kjs/wtf/HashSet.h:217
#6  KJS::Identifier::add (c=0x7f01a433c0b8 "[[NodeConstructor.constructor]]") at ../../kjs/identifier.cpp:103
#7  0x00007f01a4174a27 in Identifier (s=0x7f01a433c0b8 "[[NodeConstructor.constructor]]", this=0x7fffaf8c00a0) at ../../kjs/identifier.h:48
#8  KJS::NodeConstructor::NodeConstructor (this=0x7f017550d140, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#9  0x00007f01a41747d8 in cacheGlobalObject<KJS::NodeConstructor> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#10 KJS::NodeConstructor::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#11 0x00007f01a41748a8 in KJS::DOMNodeProto::DOMNodeProto (this=0x7f017550d0c0, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:122
#12 0x00007f01a4174978 in cacheGlobalObject<KJS::DOMNodeProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#13 KJS::DOMNodeProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:114
#14 0x00007f01a4174a6c in KJS::NodeConstructor::NodeConstructor (this=0x7f017550d040, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#15 0x00007f01a41747d8 in cacheGlobalObject<KJS::NodeConstructor> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331

bottom:

#785423 0x00007f01a41748a8 in KJS::DOMNodeProto::DOMNodeProto (this=0x7f0185049d40, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:122
#785424 0x00007f01a4174978 in cacheGlobalObject<KJS::DOMNodeProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785425 KJS::DOMNodeProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:114
#785426 0x00007f01a4174a6c in KJS::NodeConstructor::NodeConstructor (this=0x7f0185049dc0, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#785427 0x00007f01a41747d8 in cacheGlobalObject<KJS::NodeConstructor> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785428 KJS::NodeConstructor::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#785429 0x00007f01a41748a8 in KJS::DOMNodeProto::DOMNodeProto (this=0x7f0185049e40, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:122
#785430 0x00007f01a4174978 in cacheGlobalObject<KJS::DOMNodeProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785431 KJS::DOMNodeProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:114
#785432 0x00007f01a4174a6c in KJS::NodeConstructor::NodeConstructor (this=0x7f0185049ec0, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#785433 0x00007f01a41747d8 in cacheGlobalObject<KJS::NodeConstructor> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785434 KJS::NodeConstructor::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#785435 0x00007f01a41748a8 in KJS::DOMNodeProto::DOMNodeProto (this=0x7f0185049f80, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:122
#785436 0x00007f01a4174978 in cacheGlobalObject<KJS::DOMNodeProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785437 KJS::DOMNodeProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:114
#785438 0x00007f01a4174a6c in KJS::NodeConstructor::NodeConstructor (this=0x7f018504a040, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#785439 0x00007f01a41747d8 in cacheGlobalObject<KJS::NodeConstructor> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785440 KJS::NodeConstructor::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#785441 0x00007f01a41748a8 in KJS::DOMNodeProto::DOMNodeProto (this=0x7f018504a0c0, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:122
#785442 0x00007f01a4174978 in cacheGlobalObject<KJS::DOMNodeProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785443 KJS::DOMNodeProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:114
#785444 0x00007f01a4174a6c in KJS::NodeConstructor::NodeConstructor (this=0x7f018504a140, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#785445 0x00007f01a41747d8 in cacheGlobalObject<KJS::NodeConstructor> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785446 KJS::NodeConstructor::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1916
#785447 0x00007f01a41748a8 in KJS::DOMNodeProto::DOMNodeProto (this=0x7f018504a1c0, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:122
#785448 0x00007f01a4174978 in cacheGlobalObject<KJS::DOMNodeProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785449 KJS::DOMNodeProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:114
#785450 0x00007f01a4174adc in KJS::DOMElementProto::DOMElementProto (this=0x7f018504a240, exec=<optimized out>) at ../../khtml/ecma/kjs_dom.cpp:1261
#785451 0x00007f01a4174b98 in cacheGlobalObject<KJS::DOMElementProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785452 KJS::DOMElementProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_dom.cpp:1261
#785453 0x00007f01a41869ac in KJS::HTMLElementProto::HTMLElementProto (this=0x7f018504a280, exec=<optimized out>) at ../../khtml/ecma/kjs_html.cpp:2692
#785454 0x00007f01a4186a68 in cacheGlobalObject<KJS::HTMLElementProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785455 KJS::HTMLElementProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_html.cpp:2692
#785456 0x00007f01a41a21fd in HTMLImageElementProto (this=0x7f018504a300, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_html.cpp:2813
#785457 cacheGlobalObject<KJS::HTMLImageElementProto> (propertyName=..., exec=0x7fffb18b66b0) at ../../kjs/lookup.h:331
#785458 KJS::HTMLImageElementProto::self (exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_html.cpp:2813
#785459 0x00007f01a41916b5 in prototypeForID (id=<optimized out>, exec=0x7fffb18b66b0) at ../../khtml/ecma/kjs_html.cpp:2961
#785460 KJS::HTMLElement::HTMLElement (this=0x7f018504a340, exec=0x7fffb18b66b0, e=0x65ca9b0) at ../../khtml/ecma/kjs_html.cpp:568
#785461 0x00007f01a417677e in KJS::getDOMNode (exec=0x7fffb18b66b0, n=0x65ca9b0) at ../../khtml/ecma/kjs_dom.cpp:1851
#785462 0x00007f01a41845c8 in KJS::ImageConstructorImp::construct (this=<optimized out>, exec=0x7fffb18b66b0, list=...) at ../../khtml/ecma/kjs_html.cpp:3507
#785463 0x00007f019da73c54 in KJS::Machine::runBlock (exec=0x7fffb18b66b0, codeBlock=..., parentExec=0x7fffb18b7120) at codes.def:1254
#785464 0x00007f019da53565 in KJS::FunctionImp::callAsFunction (this=0x7f018514ce40, exec=0x7fffb18b7120, thisObj=<optimized out>, args=...) at ../../kjs/function.cpp:171
#785465 0x00007f019da73a2b in call (args=..., thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at ../../kjs/object.h:632
#785466 KJS::Machine::runBlock (exec=0x7fffb18b7120, codeBlock=..., parentExec=0x7fffb18b7b90) at codes.def:1233
#785467 0x00007f019da53565 in KJS::FunctionImp::callAsFunction (this=0x7f018514cc80, exec=0x7fffb18b7b90, thisObj=<optimized out>, args=...) at ../../kjs/function.cpp:171
#785468 0x00007f019da73a2b in call (args=..., thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at ../../kjs/object.h:632
#785469 KJS::Machine::runBlock (exec=0x7fffb18b7b90, codeBlock=..., parentExec=0x7fffb18b8600) at codes.def:1233
#785470 0x00007f019da53565 in KJS::FunctionImp::callAsFunction (this=0x7f018514cec0, exec=0x7fffb18b8600, thisObj=<optimized out>, args=...) at ../../kjs/function.cpp:171
#785471 0x00007f019da73a2b in call (args=..., thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at ../../kjs/object.h:632
#785472 KJS::Machine::runBlock (exec=0x7fffb18b8600, codeBlock=..., parentExec=0x7fffb18b9070) at codes.def:1233
#785473 0x00007f019da53565 in KJS::FunctionImp::callAsFunction (this=0x7f018514b300, exec=0x7fffb18b9070, thisObj=<optimized out>, args=...) at ../../kjs/function.cpp:171
#785474 0x00007f019da73a2b in call (args=..., thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at ../../kjs/object.h:632
#785475 KJS::Machine::runBlock (exec=0x7fffb18b9070, codeBlock=..., parentExec=0x7fffb18b9ae0) at codes.def:1233
#785476 0x00007f019da53565 in KJS::FunctionImp::callAsFunction (this=0x7f018506ae80, exec=0x7fffb18b9ae0, thisObj=<optimized out>, args=...) at ../../kjs/function.cpp:171
#785477 0x00007f019da73a2b in call (args=..., thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at ../../kjs/object.h:632
#785478 KJS::Machine::runBlock (exec=0x7fffb18b9ae0, codeBlock=..., parentExec=0x7fffb18ba550) at codes.def:1233
#785479 0x00007f019da53565 in KJS::FunctionImp::callAsFunction (this=0x7f0185066dc0, exec=0x7fffb18ba550, thisObj=<optimized out>, args=...) at ../../kjs/function.cpp:171
#785480 0x00007f019da73a2b in call (args=..., thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at ../../kjs/object.h:632
#785481 KJS::Machine::runBlock (exec=0x7fffb18ba550, codeBlock=..., parentExec=0x7fffb18bb170) at codes.def:1233
#785482 0x00007f019da53565 in KJS::FunctionImp::callAsFunction (this=0x7f0185116800, exec=0x7fffb18bb170, thisObj=<optimized out>, args=...) at ../../kjs/function.cpp:171
#785483 0x00007f019da73a2b in call (args=..., thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at ../../kjs/object.h:632
#785484 KJS::Machine::runBlock (exec=0x7fffb18bb170, codeBlock=..., parentExec=0x0) at codes.def:1233
#785485 0x00007f019da28b67 in KJS::FunctionBodyNode::execute (this=0x2e9bd20, exec=0x7fffb18bb170) at ../../kjs/nodes.cpp:927
#785486 0x00007f019da5c7c0 in KJS::Interpreter::evaluate (this=0x3057500, sourceURL=..., startingLineNumber=0, code=0x6ca2520, codeLength=33816, thisV=0x7f0185321f40) at ../../kjs/interpreter.cp
p:567
#785487 0x00007f019da5c8a4 in KJS::Interpreter::evaluate (this=<optimized out>, sourceURL=..., startingLineNumber=<optimized out>, code=..., thisV=<optimized out>) at ../../kjs/interpreter.cpp:5
07
#785488 0x00007f01a41c0777 in KJSProxy::evaluate (this=0x2eba5e0, filename=..., baseLine=0, str=..., n=..., completion=0x7fffb18bb420) at ../../khtml/ecma/kjs_proxy.cpp:126
#785489 0x00007f01a3f54453 in KHTMLPart::executeScript (this=0x50191b0, filename=..., baseLine=0, n=..., script=...) at ../../khtml/khtml_part.cpp:1292
#785490 0x00007f01a4016fb5 in khtml::HTMLTokenizer::scriptExecution (this=0x65786d0, str=..., scriptURL=..., baseLine=0) at ../../khtml/html/htmltokenizer.cpp:517
#785491 0x00007f01a401afed in khtml::HTMLTokenizer::notifyFinished (this=0x65786d0, finishedObj=<optimized out>) at ../../khtml/html/htmltokenizer.cpp:2114
#785492 0x00007f01a401c00e in khtml::HTMLTokenizer::scriptHandler (this=0x65786d0) at ../../khtml/html/htmltokenizer.cpp:462
#785493 0x00007f01a401d851 in khtml::HTMLTokenizer::parseRawContent (this=0x65786d0, src=...) at ../../khtml/html/htmltokenizer.cpp:379
#785494 0x00007f01a401ff75 in khtml::HTMLTokenizer::parseTag (this=0x65786d0, src=...) at ../../khtml/html/htmltokenizer.cpp:1528
#785495 0x00007f01a4020a35 in khtml::HTMLTokenizer::write (this=0x65786d0, str=..., appendData=<optimized out>) at ../../khtml/html/htmltokenizer.cpp:1795
#785496 0x00007f01a3fc4993 in DOM::DocumentImpl::write (this=0x61d5800, text=...) at ../../khtml/xml/dom_docimpl.cpp:1687
#785497 0x00007f01a4184ead in KJS::HTMLDocFunction::callAsFunction (this=0x7f01851cfdc0, exec=0x7fffb18bcac0, thisObj=<optimized out>, args=...) at ../../khtml/ecma/kjs_html.cpp:135
#785498 0x00007f019da73a2b in call (args=..., thisObj=<optimized out>, exec=<optimized out>, this=<optimized out>) at ../../kjs/object.h:632
#785499 KJS::Machine::runBlock (exec=0x7fffb18bcac0, codeBlock=..., parentExec=0x0) at codes.def:1233
#785500 0x00007f019da28b67 in KJS::FunctionBodyNode::execute (this=0x5a4c530, exec=0x7fffb18bcac0) at ../../kjs/nodes.cpp:927
#785501 0x00007f019da5c7c0 in KJS::Interpreter::evaluate (this=0x3057500, sourceURL=..., startingLineNumber=0, code=0x33ee990, codeLength=1465, thisV=0x7f0185321f40) at ../../kjs/interpreter.cpp:567
#785502 0x00007f019da5c8a4 in KJS::Interpreter::evaluate (this=<optimized out>, sourceURL=..., startingLineNumber=<optimized out>, code=..., thisV=<optimized out>) at ../../kjs/interpreter.cpp:507
#785503 0x00007f01a41c0777 in KJSProxy::evaluate (this=0x2eba5e0, filename=..., baseLine=0, str=..., n=..., completion=0x7fffb18bcd70) at ../../khtml/ecma/kjs_proxy.cpp:126
#785504 0x00007f01a3f54453 in KHTMLPart::executeScript (this=0x50191b0, filename=..., baseLine=0, n=..., script=...) at ../../khtml/khtml_part.cpp:1292
#785505 0x00007f01a4016fb5 in khtml::HTMLTokenizer::scriptExecution (this=0x65786d0, str=..., scriptURL=..., baseLine=0) at ../../khtml/html/htmltokenizer.cpp:517
#785506 0x00007f01a401afed in khtml::HTMLTokenizer::notifyFinished (this=0x65786d0, finishedObj=<optimized out>) at ../../khtml/html/htmltokenizer.cpp:2114
#785507 0x00007f01a413ae2f in khtml::CachedScript::checkNotify (this=0x21aca50) at ../../khtml/misc/loader.cpp:397
#785508 0x00007f01a413b01c in khtml::CachedScript::data (this=0x21aca50, buffer=..., eof=<optimized out>) at ../../khtml/misc/loader.cpp:389
#785509 0x00007f01a413cb2b in khtml::Loader::slotFinished (this=0xbfe8e0, job=0x682be10) at ../../khtml/misc/loader.cpp:1273
#785510 0x00007f01a7bf7781 in QMetaObject::activate (sender=0x682be10, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffb18bd3e0) at kernel/qobject.cpp:3547
#785511 0x00007f01a8070e72 in KJob::result (this=<optimized out>, _t1=0x682be10) at ./kjob.moc:208
#785512 0x00007f01a8070eb0 in KJob::emitResult (this=0x682be10) at ../../kdecore/jobs/kjob.cpp:318
#785513 0x00007f01a6b48263 in KIO::SimpleJob::slotFinished (this=0x682be10) at ../../kio/kio/job.cpp:496
#785514 0x00007f01a6b5007d in KIO::TransferJob::slotFinished (this=0x682be10) at ../../kio/kio/job.cpp:1099
#785515 0x00007f01a7bf7781 in QMetaObject::activate (sender=0x339b290, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#785516 0x00007f01a6bf7321 in KIO::SlaveInterface::dispatch (this=<optimized out>, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:176
#785517 0x00007f01a6bf4a15 in KIO::SlaveInterface::dispatch (this=<optimized out>) at ../../kio/kio/slaveinterface.cpp:92
#785518 0x00007f01a6be7dce in KIO::Slave::gotInput (this=0x339b290) at ../../kio/kio/slave.cpp:344
#785519 0x00007f01a7bf7781 in QMetaObject::activate (sender=0x240c810, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#785520 0x00007f01a6b18d27 in dequeue (this=<optimized out>) at ../../kio/kio/connection.cpp:82
#785521 KIO::ConnectionPrivate::dequeue (this=0x5342e10) at ../../kio/kio/connection.cpp:71
#785522 0x00007f01a7bfc946 in QObject::event (this=0x240c810, e=<optimized out>) at kernel/qobject.cpp:1195
#785523 0x00007f01a85e37b4 in notify_helper (e=0x6a0e050, receiver=0x240c810, this=0x671790) at kernel/qapplication.cpp:4556
#785524 QApplicationPrivate::notify_helper (this=0x671790, receiver=0x240c810, e=0x6a0e050) at kernel/qapplication.cpp:4528
#785525 0x00007f01a85e8583 in QApplication::notify (this=0x7fffb18be610, receiver=0x240c810, e=0x6a0e050) at kernel/qapplication.cpp:4417
#785526 0x00007f01a931be36 in KApplication::notify (this=0x7fffb18be610, receiver=0x240c810, event=0x6a0e050) at ../../kdeui/kernel/kapplication.cpp:311
#785527 0x00007f01a7be332c in QCoreApplication::notifyInternal (this=0x7fffb18be610, receiver=0x240c810, event=0x6a0e050) at kernel/qcoreapplication.cpp:915
#785528 0x00007f01a7be710a in sendEvent (event=0x6a0e050, receiver=0x240c810) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#785529 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x635390) at kernel/qcoreapplication.cpp:1539
#785530 0x00007f01a7c12493 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#785531 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#785532 0x00007f01a1a5ed13 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#785533 0x00007f01a1a5f060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#785534 0x00007f01a1a5f124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#785535 0x00007f01a7c128bf in QEventDispatcherGlib::processEvents (this=0x636c20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#785536 0x00007f01a868bcde in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#785537 0x00007f01a7be1e62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#785538 0x00007f01a7be20b7 in QEventLoop::exec (this=0x7fffb18be5c0, flags=...) at kernel/qeventloop.cpp:204
#785539 0x00007f01a7be7407 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#785540 0x0000000000407c4c in ?? ()
#785541 0x00007f01a6f3776d in __libc_start_main (main=0x407760, argc=1, ubp_av=0x7fffb18be8e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb18be8d8) at libc-start.c:226
#785542 0x0000000000407f0d in _start ()


attached backtrace is huge.