Version:           svn (using KDE 4.3.5)
Compiler:          gcc-4.3.4 
Installed from:    Gentoo Packages

Not always, but often when I save a file, kdevelop crashes with the following crash. I also get often a crash when a file is modified from another application (e.g. hg pull --rebase). In case the backtrace is different, I'll reopen a new bug: 

Thread 2 (Thread 0x7f232ab56910 (LWP 3158)):
#0  0x00007f2357e3c5ff in pthread_cond_signal@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f23580acb72 in QWaitCondition::wakeOne() () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f2354bdb23e in KDevelop::shouldDoDUChainReferenceCounting (item=0x7f230cf5c6fa) at /local/bschindler/projects/kdevplatform/language/duchain/referencecounting.h:73
#3  0x00007f2354c398eb in ~IndexedQualifiedIdentifier (this=0xc7cc1c, __in_chrg=<value optimized out>) at /local/bschindler/projects/kdevplatform/language/duchain/identifier.cpp:1214
#4  0x00007f2354bdd73c in KDevelop::CodeModelRepositoryItem::itemsFree (this=<value optimized out>) at /local/bschindler/projects/kdevplatform/language/duchain/codemodel.cpp:108
#5  0x00007f2354bdd779 in ~CodeModelRepositoryItem (this=0xc7cc1c, __in_chrg=<value optimized out>) at /local/bschindler/projects/kdevplatform/language/duchain/codemodel.cpp:87
#6  0x00007f2354bdd8d8 in KDevelop::Bucket<KDevelop::CodeModelRepositoryItem, KDevelop::CodeModelRequestItem, true, 0u>::deleteItem<KDevelop::ItemRepository<KDevelop::CodeModelRepositoryItem, KDevelop::CodeModelRequestItem, true, true, 0u, 1048576u> > (this=0x7f231d2e4ed0, index=2, hash=<value optimized out>, repository=...)
    at /local/bschindler/projects/kdevplatform/language/duchain/repositories/itemrepository.h:796
#7  0x00007f2354bddc01 in KDevelop::ItemRepository<KDevelop::CodeModelRepositoryItem, KDevelop::CodeModelRequestItem, true, true, 0u, 1048576u>::deleteItem (this=0x2681480, index=1)
    at /local/bschindler/projects/kdevplatform/language/duchain/repositories/itemrepository.h:1676
#8  0x00007f2354bd730b in KDevelop::CodeModel::addItem (this=0x7f2354f8b760, file=<value optimized out>, id=<value optimized out>, kind=<value optimized out>)
    at /local/bschindler/projects/kdevplatform/language/duchain/codemodel.cpp:225
#9  0x00007f2354c281e7 in KDevelop::Declaration::setInSymbolTable (this=0x7f23408b7650, inSymbolTable=true) at /local/bschindler/projects/kdevplatform/language/duchain/declaration.cpp:657
#10 0x00007f2354c27d18 in KDevelop::Declaration::setIdentifier (this=0x7f23408b7650, identifier=...) at /local/bschindler/projects/kdevplatform/language/duchain/declaration.cpp:298
#11 0x00007f23313cc0f3 in Cpp::SpecialTemplateDeclaration<KDevelop::ClassMemberDeclaration>* DeclarationBuilder::openDeclarationReal<Cpp::SpecialTemplateDeclaration<KDevelop::ClassMemberDeclaration> >(NameAST*, AST*, KDevelop::Identifier const&, bool, bool, KDevelop::SimpleRange const*) () from /home/bschindl/env/lib64/libkdev4cppduchain.so
#12 0x00007f23313cd8ef in KDevelop::ClassMemberDeclaration* DeclarationBuilder::openDeclaration<KDevelop::ClassMemberDeclaration>(NameAST*, AST*, KDevelop::Identifier const&, bool, bool) ()
   from /home/bschindl/env/lib64/libkdev4cppduchain.so
#13 0x00007f23313ae206 in DeclarationBuilder::openNormalDeclaration (this=0x7f232ab54e50, name=0x7f231fdc7628, rangeNode=0x7f231fdc74d8, customName=..., collapseRange=false)
    at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:662
#14 0x00007f23313ae615 in DeclarationBuilder::openDefinition (this=0x7f232ab54e50, name=0x7f231fdc7628, rangeNode=0x7f231fdc74d8, collapseRange=false)
    at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:649
#15 0x00007f23313afb37 in DeclarationBuilder::visitDeclarator (this=0x7f232ab54e50, node=0x7f231fdc74d8) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:306
#16 0x00007f233139e1ee in ContextBuilder::visitInitDeclarator (this=0x7f232ab54e50, node=0x7f231fdc7668) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/contextbuilder.cpp:1009
#17 0x00007f23313b03ca in DeclarationBuilder::visitInitDeclarator (this=0x7f232ab54e50, node=0x7f231fdc7668) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:252
#18 0x00007f23310fc1dd in visitNodes<InitDeclaratorAST*> (v=0x7f232ab54eb0, nodes=<value optimized out>) at /local/bschindler/projects/kdevelop/languages/cpp/parser/visitor.h:128
#19 0x00007f233139b144 in ContextBuilder::visitTypedef (this=<value optimized out>, node=0x1) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/contextbuilder.cpp:654
#20 0x00007f23313d4d2d in TypeBuilder::visitTypedef (this=0x7f232ab54e50, node=0x7f231fdc76b8) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/typebuilder.cpp:500
#21 0x00007f23310fbb9d in visitNodes<DeclarationAST*> (v=0x7f232ab54eb0, nodes=<value optimized out>) at /local/bschindler/projects/kdevelop/languages/cpp/parser/visitor.h:128
#22 0x00007f233139c0ea in ContextBuilder::visitClassSpecifier (this=0x7f232ab54e50, node=0x7f231fd99ba0) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/contextbuilder.cpp:647
#23 0x00007f23313d5ee8 in TypeBuilder::visitClassSpecifier (this=0x7f232ab54e50, node=0x7f231fd99ba0) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/typebuilder.cpp:79
#24 0x00007f23313aed07 in DeclarationBuilder::visitClassSpecifier (this=0x7f232ab54e50, node=0x7f231fd99ba0) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:992
#25 0x00007f23313d4beb in TypeBuilder::visitSimpleDeclaration (this=0x7f232ab54e50, node=0x7f231fddd098) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/typebuilder.cpp:536
#26 0x00007f23313b0550 in DeclarationBuilder::visitSimpleDeclaration (this=0x7f232ab54e50, node=0x7f231fddd098)
    at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:266
#27 0x00007f233139b82e in ContextBuilder::visitTemplateDeclaration (this=0x7f232ab54e50, ast=0x7f231fddd0f0) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/contextbuilder.cpp:338
#28 0x00007f23310fbb9d in visitNodes<DeclarationAST*> (v=0x7f232ab54eb0, nodes=<value optimized out>) at /local/bschindler/projects/kdevelop/languages/cpp/parser/visitor.h:128
#29 0x00007f233139c2f7 in ContextBuilder::visitNamespace (this=0x7f232ab54e50, node=0x7f231c0188b0) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/contextbuilder.cpp:586
#30 0x00007f23313ad269 in DeclarationBuilder::visitNamespace (this=0x7f232ab54e50, ast=0x7f231c0188b0) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:950
#31 0x00007f23310fbb9d in visitNodes<DeclarationAST*> (v=0x7f232ab54eb0, nodes=<value optimized out>) at /local/bschindler/projects/kdevelop/languages/cpp/parser/visitor.h:128
#32 0x00007f233139c2f7 in ContextBuilder::visitNamespace (this=0x7f232ab54e50, node=0x7f231c018840) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/contextbuilder.cpp:586
#33 0x00007f23313ad269 in DeclarationBuilder::visitNamespace (this=0x7f232ab54e50, ast=0x7f231c018840) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:950
#34 0x00007f23310fbb9d in visitNodes<DeclarationAST*> (v=0x7f232ab54eb0, nodes=<value optimized out>) at /local/bschindler/projects/kdevelop/languages/cpp/parser/visitor.h:128
#35 0x00007f23313a142f in KDevelop::AbstractContextBuilder<AST, NameAST>::supportBuild (this=0x7f232ab54e50, node=0x7f231407bf50, context=<value optimized out>)
    at /home/bschindl/env/include/kdevplatform/language/duchain/builders/abstractcontextbuilder.h:201
#36 0x00007f23313b456d in KDevelop::AbstractTypeBuilder<AST, NameAST, ContextBuilder>::supportBuild (this=<value optimized out>, node=0x7f231407bf50, context=0x0)
    at /home/bschindl/env/include/kdevplatform/language/duchain/builders/abstracttypebuilder.h:85
#37 0x00007f233139d77c in ContextBuilder::buildContexts (this=0x7f232ab54e50, file=..., node=0x7f231407bf50, includes=0x7f232ab55c40, updateContext=..., removeOldImports=false)
    at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/contextbuilder.cpp:491
#38 0x00007f23313b0a57 in DeclarationBuilder::buildDeclarations (this=0x7f232ab54e50, file=<value optimized out>, node=0x7f231407bf50, includes=0x7f232ab55c40, updateContext=..., 
    removeOldImports=false) at /local/bschindler/projects/kdevelop/languages/cpp/cppduchain/declarationbuilder.cpp:105
#39 0x00007f23318cc256 in CPPInternalParseJob::run (this=0xfdd5490) at /local/bschindler/projects/kdevelop/languages/cpp/cppparsejob.cpp:688
#40 0x00007f2359879dfc in ?? () from /usr/lib/libthreadweaver.so.4
#41 0x00007f235987a11f in ThreadWeaver::Job::execute(ThreadWeaver::Thread*) () from /usr/lib/libthreadweaver.so.4
#42 0x00007f235987b493 in ?? () from /usr/lib/libthreadweaver.so.4
#43 0x00007f23598790ff in ?? () from /usr/lib/libthreadweaver.so.4
#44 0x00007f2359879569 in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4
#45 0x00007f23580ac274 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#46 0x00007f2357e382a7 in start_thread () from /lib/libpthread.so.0
#47 0x00007f23566066ad in clone () from /lib/libc.so.6