I use Yii Framework 1.1.10 and when background parsing starts kdevelop always crashes on 30%-40% parsed.
Backtrace:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xaa748b70 (LWP 7029)]
KDevelop::Declaration::indexedType (this=0x0) at ../../language/duchain/declaration.cpp:305
305   ../../language/duchain/declaration.cpp: No such file or directory.

Thread 12 (Thread 0xa9f47b70 (LWP 7030)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb658a20a in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#2  0xb67ff21d in pthread_cond_wait () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#3  0xb7479bd0 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0xb547e266 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5480d5b in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb547de9a in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5480e5c in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb547ddf3 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb547f994 in ?? () from /usr/lib/libthreadweaver.so.4
#10 0xb547fa4a in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4
#11 0xb74796c3 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#12 0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#13 0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 11 (Thread 0xaa748b70 (LWP 7029)):
#0  KDevelop::Declaration::indexedType (this=0x0) at ../../language/duchain/declaration.cpp:305
#1  0xb5f5d8fd in KDevelop::isPublicBaseClassInternal (self=0x0, base=0x98c49c0, topContext=0xa434dc8, 
    baseConversionLevels=0x0, depth=0, checked=0x0) at ../../language/duchain/classdeclaration.cpp:111
#2  0xb5f5dcf7 in KDevelop::ClassDeclaration::isPublicBaseClass (this=0x0, base=0x98c49c0,
    topContext=0xa434dc8, baseConversionLevels=0x0) at ../../language/duchain/classdeclaration.cpp:137
#3  0xaaffb2bf in Php::TypeBuilder::visitStatement (this=0xaa747f20, node=0xa8d1817c)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/typebuilder.cpp:512
#4  0xaafe7a7c in Php::DeclarationBuilder::visitStatement (this=0xaa747f20, node=0xa8d1817c)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/declarationbuilder.cpp:1029
#5  0xaafad286 in Php::Visitor::visitNode (this=0xaa747f50, node=0xa8d1817c)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:292
#6  0xaafaf74c in Php::DefaultVisitor::visitTopStatement (this=0xaa747f50, node=0xa8d18154)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpdefaultvisitor.cpp:987
#7  0xaafad2fe in Php::Visitor::visitNode (this=0xaa747f50, node=0xa8d18154)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:310
#8  0xaafaeaee in Php::DefaultVisitor::visitInnerStatementList (this=0xaa747f50, node=0xa8d11210)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpdefaultvisitor.cpp:541
#9  0xaafad01a in Php::Visitor::visitNode (this=0xaa747f50, node=0xa8d11210)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:199
#10 0xaafaecca in Php::DefaultVisitor::visitMethodBody (this=0xaa747f50, node=0xa8d111f4)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpdefaultvisitor.cpp:618
#11 0xaaff138c in Php::ContextBuilder::visitClassStatement (this=0xaa747f20, node=0xa8d1116c)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/contextbuilder.cpp:236
#12 0xaaffa8f2 in Php::TypeBuilder::visitClassStatement (this=0xaa747f20, node=0xa8d1116c)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/typebuilder.cpp:296
#13 0xaafe969d in Php::DeclarationBuilder::visitClassStatement (this=0xaa747f20, node=0xa8d1116c)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/declarationbuilder.cpp:340
#14 0xaafacd31 in Php::Visitor::visitNode (this=0xaa747f50, node=0xa8d1116c)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:85
#15 0xaafae04e in Php::DefaultVisitor::visitClassBody (this=0xaa747f50, node=0xa8d26d34)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpdefaultvisitor.cpp:199
#16 0xaafaccdc in Php::Visitor::visitNode (this=0xaa747f50, node=0xa8d26d34)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:70
#17 0xaafae0b8 in Php::DefaultVisitor::visitClassDeclarationStatement (this=0xaa747f50, node=0xa8d26be8)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpdefaultvisitor.cpp:212
#18 0xaaff2794 in Php::ContextBuilder::visitClassDeclarationStatement (this=0xaa747f20, node=0xa8d26be8)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/contextbuilder.cpp:200
#19 0xaaff76d3 in Php::TypeBuilder::visitClassDeclarationStatement (this=0xaa747f20, node=0xa8d26be8)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/typebuilder.cpp:278
#20 0xaafeb60a in Php::DeclarationBuilder::visitClassDeclarationStatement (this=0xaa747f20, node=0xa8d26be8)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/declarationbuilder.cpp:168
#21 0xaafacced in Php::Visitor::visitNode (this=0xaa747f50, node=0xa8d26be8)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:73
#22 0xaafaf76a in Php::DefaultVisitor::visitTopStatement (this=0xaa747f50, node=0xa8d26bc0)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpdefaultvisitor.cpp:989
#23 0xaafad2fe in Php::Visitor::visitNode (this=0xaa747f50, node=0xa8d26bc0)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:310
#24 0xaafaefa1 in Php::DefaultVisitor::visitOuterTopStatement (this=0xaa747f50, node=0xa8d26ba0)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpdefaultvisitor.cpp:727
#25 0xaafe5d30 in Php::DeclarationBuilder::visitOuterTopStatement (this=0xaa747f20, node=0xa8d26ba0)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/declarationbuilder.cpp:658
#26 0xaafad196 in Php::Visitor::visitNode (this=0xaa747f50, node=0xa8d26ba0)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:256
#27 0xaafaf22e in Php::DefaultVisitor::visitStart (this=0xaa747f50, node=0xac0e1c78)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpdefaultvisitor.cpp:819
#28 0xaafad272 in Php::Visitor::visitNode (this=0xaa747f50, node=0xac0e1c78)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/obj-i486-linux-gnu/parser/phpvisitor.cpp:289
#29 0xaaff2d38 in Php::ContextBuilder::startVisiting (this=0xaa747f20, node=0xac0e1c78)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/contextbuilder.cpp:116
#30 0xaafe57b9 in Php::DeclarationBuilder::startVisiting (this=0xaa747f20, node=0xac0e1c78)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/declarationbuilder.cpp:143
#31 0xaafe65b6 in supportBuild (context=0xa434dc8, node=0xac0e1c78, this=0xaa747f20)
    at /usr/include/kdevplatform/language/duchain/builders/abstractcontextbuilder.h:133
#32 supportBuild (context=0xa434dc8, node=0xac0e1c78, this=0xaa747f20)
    at /usr/include/kdevplatform/language/duchain/builders/abstracttypebuilder.h:85
#33 Php::DeclarationBuilder::supportBuild (this=0xaa747f20, node=0xac0e1c78, context=0xa434dc8)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/declarationbuilder.cpp:1188
#34 0xaafe6901 in build (updateContext=..., node=0xac0e1c78, url=..., this=0xaa747f20)
    at /usr/include/kdevplatform/language/duchain/builders/abstractcontextbuilder.h:113
#35 Php::DeclarationBuilder::build (this=0xaa747f20, url=..., node=0xac0e1c78, updateContext=...)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/duchain/builders/declarationbuilder.cpp:136
#36 0xab076c60 in Php::ParseJob::run (this=0x8fd7918)
    at /build/buildd-kdevelop-php_1.2.2-1-i386-ISyOCL/kdevelop-php-1.2.2/phpparsejob.cpp:151
#37 0xb548030d in ?? () from /usr/lib/libthreadweaver.so.4
#38 0xb5480473 in ThreadWeaver::Job::execute(ThreadWeaver::Thread*) () from /usr/lib/libthreadweaver.so.4
#39 0xb5481c90 in ThreadWeaver::JobCollection::execute(ThreadWeaver::Thread*) ()
   from /usr/lib/libthreadweaver.so.4
#40 0xb547f962 in ?? () from /usr/lib/libthreadweaver.so.4
#41 0xb547fa4a in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4
#42 0xb74796c3 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#43 0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#44 0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 10 (Thread 0xaaf49b70 (LWP 7028)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb67e4746 in poll () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#2  0xb5a1bafb in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb5a0d076 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb5a0d40a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb75a25d7 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#6  0xb757333d in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#7  0xb7573581 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#8  0xb747685b in QThread::exec() () from /usr/lib/libQtCore.so.4
#9  0xb601eee6 in KDevelop::CompletionWorkerThread::run (this=0x9160c68)
    at ../../language/codecompletion/codecompletionmodel.cpp:80
#10 0xb74796c3 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#11 0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#12 0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 9 (Thread 0xabcfeb70 (LWP 7011)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb67e4746 in poll () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#2  0xb5a1bafb in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb5a0d076 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb5a0d40a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb75a25d7 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#6  0xb757333d in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#7  0xb7573581 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#8  0xb747685b in QThread::exec() () from /usr/lib/libQtCore.so.4
#9  0xb747694b in QThread::run() () from /usr/lib/libQtCore.so.4
#10 0xb74796c3 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#11 0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#12 0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 8 (Thread 0xad653b70 (LWP 7010)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb658a20a in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#2  0xb67ff21d in pthread_cond_wait () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#3  0xb4d38bab in ?? () from /usr/lib/libQtWebKit.so.4
#4  0xb4d38ccf in ?? () from /usr/lib/libQtWebKit.so.4
#5  0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#6  0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 7 (Thread 0xace52b70 (LWP 7001)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb67e4746 in poll () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#2  0xb5a1bafb in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb5a0d076 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb5a0d40a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb75a25d7 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#6  0xb757333d in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#7  0xb7573581 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#8  0xb747685b in QThread::exec() () from /usr/lib/libQtCore.so.4
#9  0xb7553e7d in QInotifyFileSystemWatcherEngine::run() () from /usr/lib/libQtCore.so.4
#10 0xb74796c3 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#11 0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#12 0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 4 (Thread 0xae6e2b70 (LWP 6995)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb658a20a in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#2  0xb67ff21d in pthread_cond_wait () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#3  0xb7479bd0 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0xb547e266 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5480d5b in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb547de9a in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5480e5c in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb547ddf3 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb547f994 in ?? () from /usr/lib/libthreadweaver.so.4
#10 0xb547fa4a in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4
#11 0xb74796c3 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#12 0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#13 0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 3 (Thread 0xaef27b70 (LWP 6993)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb67eb431 in select () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#2  0xb7553764 in QProcessManager::run() () from /usr/lib/libQtCore.so.4
#3  0xb74796c3 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#4  0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#5  0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 2 (Thread 0xb020db70 (LWP 6992)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb658a703 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#2  0xb67ff274 in pthread_cond_timedwait () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#3  0xb7479b5e in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0xb5f1daaa in KDevelop::DUChainPrivate::CleanupThread::run (this=0x83ab648)
    at ../../language/duchain/duchain.cpp:286
#5  0xb74796c3 in QThreadPrivate::start(void*) () from /usr/lib/libQtCore.so.4
#6  0xb6585c39 in start_thread () from /lib/i386-linux-gnu/i686/cmov/libpthread.so.0
#7  0xb67f212e in clone () from /lib/i386-linux-gnu/i686/cmov/libc.so.6

Thread 1 (Thread 0xb2fe2710 (LWP 6962)):
#0  0xb7fe2424 in __kernel_vsyscall ()
#1  0xb67e4746 in poll () from /lib/i386-linux-gnu/i686/cmov/libc.so.6
#2  0xb5a1bafb in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb5a0d076 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb5a0d40a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb75a25d7 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#6  0xb6b61b9a in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtGui.so.4
#7  0xb757333d in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/libQtCore.so.4
#8  0xb7573581 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#9  0xb7577cda in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#10 0xb6aaa784 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#11 0x08051433 in main (argc=<optimized out>, 
    argv=<error reading variable: Cannot access memory at address 0x11>) at ../../app/main.cpp:467