Bug 337722

Summary: Crashes on editing a php file
Product: [Applications] kdevelop Reporter: Jonathan Verner <jonathan.verner>
Component: Language Support: PHPAssignee: kdevelop-bugs-null
Status: RESOLVED DUPLICATE    
Severity: crash    
Priority: NOR    
Version First Reported In: 4.6.0   
Target Milestone: ---   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: The php file in the state when kdevelop crashed (I was currently typing the comment '/* Returns the name of the co' (line 88, col 34)

Description Jonathan Verner 2014-07-23 10:14:50 UTC 
Created attachment 87897 [details]
The php file in the state when kdevelop crashed (I was currently typing the comment '/* Returns the name of the co' (line 88, col 34)

When editing a certain file (attached) from a larger project, kdevelop regularly crashes. The crash always happens when the file is in an "inconsistent" state - when I open the file in kate and finish editing it, so that it is "valid php" , kdevelop opens it just fine; on the other hand, when the crash happens, it happens consistently until the file is modified --- upon opening it kdevelop crashes.


Possibly related to Bug #250781 (the backtrace looks vaguely similar; but in my
case it does not seem to hit an assert)

Backtrace (from gdb):
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff2df0d700 (LWP 22715)]
0x00007ffff1b92f41 in KDevelop::DUContext::findDeclarations(KDevelop::QualifiedIdentifier const&, KDevelop::CursorInRevision const&, TypePtr<KDevelop::AbstractType> const&, KDevelop::TopDUContext const*, QFlags<KDevelop::DUContext::SearchFlag>) const ()
   from /usr/lib/libkdevplatformlanguage.so.7

(gdb) back

#0  0x00007ffff1b92f41 in KDevelop::DUContext::findDeclarations(KDevelop::QualifiedIdentifier const&, KDevelop::CursorInRevision const&, TypePtr<KDevelop::AbstractType> const&, KDevelop::TopDUContext const*, QFlags<KDevelop::DUContext::SearchFlag>) const ()
   from /usr/lib/libkdevplatformlanguage.so.7
#1  0x00007fff47c2a26e in Php::TypeBuilder::visitStatement (this=this@entry=0x7fff2df0cbc0,
    node=node@entry=0x7fff20ae4e58)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/typebuilder.cpp:536
#2  0x00007fff47c1dc9c in Php::DeclarationBuilder::visitStatement (this=0x7fff2df0cbc0,
    node=0x7fff20ae4e58)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/declarationbuilder.cpp:1033
#3  0x00007fff479d4036 in Php::DefaultVisitor::visitTopStatement (this=0x7fff2df0cc20,
    node=0x7fff20ae4e10)
    at /build/buildd/kdevelop-php-1.6.0/obj-x86_64-linux-gnu/parser/phpdefaultvisitor.cpp:996
#4  0x00007fff479d345d in Php::DefaultVisitor::visitInnerStatementList (
    this=0x7fff2df0cc20, node=<optimized out>)
    at /build/buildd/kdevelop-php-1.6.0/obj-x86_64-linux-gnu/parser/phpdefaultvisitor.cpp:544
#5  0x00007fff47c22532 in Php::ContextBuilder::visitClassStatement (
    this=this@entry=0x7fff2df0cbc0, node=node@entry=0x7fff20ae4c70)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/contextbuilder.cpp:244
#6  0x00007fff47c29b1f in Php::TypeBuilder::visitClassStatement (
    this=this@entry=0x7fff2df0cbc0, node=node@entry=0x7fff20ae4c70)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/typebuilder.cpp:305
#7  0x00007fff47c18c8f in Php::DeclarationBuilder::visitClassStatement (
    this=0x7fff2df0cbc0, node=0x7fff20ae4c70)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/declarationbuilder.cpp:361
#8  0x00007fff479d2b6d in Php::DefaultVisitor::visitClassBody (this=0x7fff2df0cc20,
    node=<optimized out>)
    at /build/buildd/kdevelop-php-1.6.0/obj-x86_64-linux-gnu/parser/phpdefaultvisitor.cpp:205
#9  0x00007fff47c21cf2 in Php::ContextBuilder::visitClassDeclarationStatement (
    this=this@entry=0x7fff2df0cbc0, node=node@entry=0x7fff20ac0a30)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/contextbuilder.cpp:200
#10 0x00007fff47c26f45 in Php::TypeBuilder::visitClassDeclarationStatement (
    this=this@entry=0x7fff2df0cbc0, node=node@entry=0x7fff20ac0a30)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/typebuilder.cpp:278
#11 0x00007fff47c1c88b in Php::DeclarationBuilder::visitClassDeclarationStatement (
    this=0x7fff2df0cbc0, node=0x7fff20ac0a30)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/declarationbuilder.cpp:177
#12 0x00007fff479d4050 in Php::DefaultVisitor::visitTopStatement (this=0x7fff2df0cc20,
    node=0x7fff20ac09e8)
    at /build/buildd/kdevelop-php-1.6.0/obj-x86_64-linux-gnu/parser/phpdefaultvisitor.cpp:998
#13 0x00007fff47c16fb3 in Php::DeclarationBuilder::visitOuterTopStatement (
    this=0x7fff2df0cbc0, node=0x7fff20ac09b8)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/declarationbuilder.cpp:696
#14 0x00007fff479d3afd in Php::DefaultVisitor::visitStart (this=0x7fff2df0cc20,
    node=<optimized out>)
    at /build/buildd/kdevelop-php-1.6.0/obj-x86_64-linux-gnu/parser/phpdefaultvisitor.cpp:823
#15 0x00007fff47c239a7 in Php::ContextBuilder::startVisiting (this=0x7fff2df0cbc0,
    node=0x7fff20b52a20)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/contextbuilder.cpp:116
#16 0x00007fff47c1838a in supportBuild (context=0x7fff2416fbe0, node=0x7fff20b52a20,
    this=0x7fff2df0cbc0)
    at /usr/include/kdevplatform/language/duchain/builders/abstractcontextbuilder.h:133
#17 supportBuild (context=<optimized out>, node=0x7fff20b52a20, this=0x7fff2df0cbc0)
    at /usr/include/kdevplatform/language/duchain/builders/abstracttypebuilder.h:85
#18 Php::DeclarationBuilder::supportBuild (this=0x7fff2df0cbc0, node=0x7fff20b52a20,
    context=<optimized out>)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/declarationbuilder.cpp:1192
#19 0x00007fff47c185d9 in build (updateContext=..., node=0x7fff20b52a20, url=...,
    this=0x7fff2df0cbc0)
    at /usr/include/kdevplatform/language/duchain/builders/abstractcontextbuilder.h:113
#20 Php::DeclarationBuilder::build (this=this@entry=0x7fff2df0cbc0, url=...,
    node=node@entry=0x7fff20b52a20, updateContext=...)
    at /build/buildd/kdevelop-php-1.6.0/duchain/builders/declarationbuilder.cpp:145
#21 0x00007fff47e843ca in Php::ParseJob::run (this=0x495bc70)
    at /build/buildd/kdevelop-php-1.6.0/phpparsejob.cpp:132
#22 0x00007fffec615cb2 in ThreadWeaver::JobRunHelper::runTheJob (
    this=this@entry=0x7fff2df0cde0, th=th@entry=0x4cbb050, job=job@entry=0x495bc70)
    at ../../../threadweaver/Weaver/Job.cpp:106
#23 0x00007fffec615e6e in ThreadWeaver::Job::execute (this=0x495bc70, th=0x4cbb050)
    at ../../../threadweaver/Weaver/Job.cpp:135
#24 0x00007fffec6156bb in ThreadWeaver::Thread::run (this=0x4cbb050)
    at ../../../threadweaver/Weaver/Thread.cpp:108
#25 0x00007ffff5a6132f in QThreadPrivate::start (arg=0x4cbb050)
    at thread/qthread_unix.cpp:349
#26 0x00007ffff3ac0182 in start_thread (arg=0x7fff2df0d700) at pthread_create.c:312
#27 0x00007ffff476430d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
Comment 1 Kevin Funk 2017-06-22 09:26:10 UTC 
Please check if the issue is fixed with newest KDevelop.
Comment 2 Jonathan Verner 2017-06-22 09:57:41 UTC 
Kdevelop 5.1.1 (Neon packages) still reliably crashes when editing this file, although the backtrace is slightly different now (see below). Might also be related to Bug #381123, the backtrace there matches my current more closely.

Application: KDevelop (kdevelop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7f858ee24900 (LWP 16647))]

Thread 10 (Thread 0x7f8545ffb700 (LWP 17321)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f85abf0046b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1a09830) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1a09910, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f85a12a707f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f85a12ab078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f85a12a8bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f85abeff509 in QThreadPrivate::start (arg=0x7f852c003190) at thread/qthread_unix.cpp:368
#10 0x00007f85a57b06ba in start_thread (arg=0x7f8545ffb700) at pthread_create.c:333
#11 0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f85467fc700 (LWP 17320)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f85abf0046b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1a09830) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1a09910, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f85a12a707f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f85a12ab078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f85a12a8bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f85abeff509 in QThreadPrivate::start (arg=0x7f8538002f90) at thread/qthread_unix.cpp:368
#12 0x00007f85a57b06ba in start_thread (arg=0x7f85467fc700) at pthread_create.c:333
#13 0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f8546ffd700 (LWP 17319)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f85abf0046b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1a09830) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1a09910, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f85a12a707f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f85a12ab078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f85a12a8bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007f85abeff509 in QThreadPrivate::start (arg=0x7f8534002d90) at thread/qthread_unix.cpp:368
#14 0x00007f85a57b06ba in start_thread (arg=0x7f8546ffd700) at pthread_create.c:333
#15 0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f85477fe700 (LWP 17318)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f85abf0046b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1a09830) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1a09910, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f85a12a707f in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f85a12ab078 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#10 0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#11 0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#12 0x00007f85a12ab0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#13 0x00007f85a12a626d in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#14 0x00007f85a12a8bf0 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#15 0x00007f85abeff509 in QThreadPrivate::start (arg=0x7f853c002e00) at thread/qthread_unix.cpp:368
#16 0x00007f85a57b06ba in start_thread (arg=0x7f85477fe700) at pthread_create.c:333
#17 0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f8547fff700 (LWP 17317)):
[KCrash Handler]
#6  KDevelop::DUContext::findDeclarations (this=0x0, identifier=..., position=..., dataType=..., topContext=0x0, flags=...) at /workspace/build/language/duchain/ducontext.cpp:770
#7  0x00007f856f9e5db9 in Php::TypeBuilder::visitStatement(Php::StatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#8  0x00007f856f9d0a6f in Php::DeclarationBuilder::visitStatement(Php::StatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#9  0x00007f856f779966 in Php::DefaultVisitor::visitTopStatement(Php::TopStatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpparser.so
#10 0x00007f856f778dae in Php::DefaultVisitor::visitInnerStatementList(Php::InnerStatementListAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpparser.so
#11 0x00007f856f9dd826 in Php::ContextBuilder::visitClassStatement(Php::ClassStatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#12 0x00007f856f9e7f22 in Php::TypeBuilder::visitClassStatement(Php::ClassStatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#13 0x00007f856f9c933d in Php::DeclarationBuilder::visitClassStatement(Php::ClassStatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#14 0x00007f856f77844e in Php::DefaultVisitor::visitClassBody(Php::ClassBodyAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpparser.so
#15 0x00007f856f9d7dc2 in Php::ContextBuilder::visitClassDeclarationStatement(Php::ClassDeclarationStatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#16 0x00007f856f9cdc2f in Php::DeclarationBuilder::visitClassDeclarationStatement(Php::ClassDeclarationStatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#17 0x00007f856f779980 in Php::DefaultVisitor::visitTopStatement(Php::TopStatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpparser.so
#18 0x00007f856f9c7572 in Php::DeclarationBuilder::visitOuterTopStatement(Php::OuterTopStatementAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#19 0x00007f856f77941e in Php::DefaultVisitor::visitStart(Php::StartAst*) () from /usr/lib/x86_64-linux-gnu/libkdevphpparser.so
#20 0x00007f856f9d600e in Php::ContextBuilder::startVisiting(Php::AstNode*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#21 0x00007f856f9d1272 in Php::DeclarationBuilder::supportBuild(Php::AstNode*, KDevelop::DUContext*) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#22 0x00007f856f9c878a in Php::DeclarationBuilder::build(KDevelop::IndexedString const&, Php::AstNode*, KDevelop::ReferencedTopDUContext) () from /usr/lib/x86_64-linux-gnu/libkdevphpduchain.so
#23 0x00007f856fc62960 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kdevplatform/27/kdevphplanguagesupport.so
#24 0x00007f85a12aa3ea in ThreadWeaver::IdDecorator::run(QSharedPointer<ThreadWeaver::JobInterface>, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#25 0x00007f85a12aa827 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#26 0x00007f85a12a9350 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#27 0x00007f85a12a8b40 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#28 0x00007f85abeff509 in QThreadPrivate::start (arg=0x85e29a0) at thread/qthread_unix.cpp:368
#29 0x00007f85a57b06ba in start_thread (arg=0x7f8547fff700) at pthread_create.c:333
#30 0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f8565156700 (LWP 16716)):
#0  0x00007f85a348ea94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f85a3449910 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f85a344a2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f85a344a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f85ac121adb in QEventDispatcherGlib::processEvents (this=0x7f855c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f85ac0cb30a in QEventLoop::exec (this=this@entry=0x7f8565155ca0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f85abefaaf4 in QThread::exec (this=this@entry=0x3d14c90) at thread/qthread.cpp:515
#7  0x00007f85a1ec6075 in QQmlThreadPrivate::run (this=0x3d14c90) at qml/ftw/qqmlthread.cpp:147
#8  0x00007f85abeff509 in QThreadPrivate::start (arg=0x3d14c90) at thread/qthread_unix.cpp:368
#9  0x00007f85a57b06ba in start_thread (arg=0x7f8565156700) at pthread_create.c:333
#10 0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f856f51c700 (LWP 16679)):
#0  0x00007f85ab80170d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f85a344a38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f85a344a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f85ac121adb in QEventDispatcherGlib::processEvents (this=0x7f85680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f85ac0cb30a in QEventLoop::exec (this=this@entry=0x7f856f51bbf0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f85abefaaf4 in QThread::exec (this=this@entry=0x1d18ea0) at thread/qthread.cpp:515
#6  0x00007f85a9a3b1bb in KDevelop::CompletionWorkerThread::run (this=0x1d18ea0) at /workspace/build/language/codecompletion/codecompletionmodel.cpp:89
#7  0x00007f85abeff509 in QThreadPrivate::start (arg=0x1d18ea0) at thread/qthread_unix.cpp:368
#8  0x00007f85a57b06ba in start_thread (arg=0x7f856f51c700) at pthread_create.c:333
#9  0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f857a40e700 (LWP 16678)):
#0  0x00007f85ab7d230d in nanosleep () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f85ac120cad in qt_nanosleep (amount=...) at kernel/qelapsedtimer_unix.cpp:195
#2  0x00007f85abefe8d4 in QThread::usleep (usecs=usecs@entry=500) at thread/qthread_unix.cpp:511
#3  0x00007f85a997ce16 in KDevelop::DUChainLock::lockForWrite (this=0x7f85aa10bb80 <KDevelop::(anonymous namespace)::Q_QGS_sdDUChainPrivate::innerFunction()::holder+32>, timeout=0) at /workspace/build/language/duchain/duchainlock.cpp:155
#4  0x00007f85a997d06c in KDevelop::DUChainWriteLocker::lock (this=0x7f857a40dc40) at /workspace/build/language/duchain/duchainlock.cpp:249
#5  0x00007f85a993b89f in KDevelop::DUChainPrivate::doMoreCleanup (this=0x7f85aa10bb60 <KDevelop::(anonymous namespace)::Q_QGS_sdDUChainPrivate::innerFunction()::holder>, retries=retries@entry=1, lockFlag=lockFlag@entry=KDevelop::DUChainPrivate::TryLock) at /workspace/build/language/duchain/duchain.cpp:709
#6  0x00007f85a993cc11 in KDevelop::DUChainPrivate::CleanupThread::run (this=0x177e500) at /workspace/build/language/duchain/duchain.cpp:290
#7  0x00007f85abeff509 in QThreadPrivate::start (arg=0x177e500) at thread/qthread_unix.cpp:368
#8  0x00007f85a57b06ba in start_thread (arg=0x7f857a40e700) at pthread_create.c:333
#9  0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f858af24700 (LWP 16670)):
#0  0x00007f85ab80170d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f85a344a38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f85a344a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f85ac121adb in QEventDispatcherGlib::processEvents (this=0x7f857c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f85ac0cb30a in QEventLoop::exec (this=this@entry=0x7f858af23c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f85abefaaf4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#6  0x00007f85ae247b75 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f85abeff509 in QThreadPrivate::start (arg=0x7f85ae2bdda0) at thread/qthread_unix.cpp:368
#8  0x00007f85a57b06ba in start_thread (arg=0x7f858af24700) at pthread_create.c:333
#9  0x00007f85ab80d3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f858ee24900 (LWP 16647)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f85abf0046b in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1c09f90) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=this@entry=0x1c09f70, mutex=mutex@entry=0x1c09f50, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f85abeff0ae in QThread::wait (this=this@entry=0x177e500, time=time@entry=18446744073709551615) at thread/qthread_unix.cpp:698
#4  0x00007f85a992cecf in KDevelop::DUChainPrivate::CleanupThread::stopThread (this=0x177e500) at /workspace/build/language/duchain/duchain.cpp:272
#5  KDevelop::DUChainPrivate::~DUChainPrivate (this=0x7f85aa10bb60 <KDevelop::(anonymous namespace)::Q_QGS_sdDUChainPrivate::innerFunction()::holder>, __in_chrg=<optimized out>) at /workspace/build/language/duchain/duchain.cpp:356
#6  0x00007f85a99261f9 in KDevelop::(anonymous namespace)::Q_QGS_sdDUChainPrivate::Holder::~Holder (this=<optimized out>, __in_chrg=<optimized out>) at /workspace/build/language/duchain/duchain.cpp:1122
#7  0x00007f85ab73fff8 in __run_exit_handlers (status=status@entry=1, listp=0x7f85abaca5f8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true) at exit.c:82
#8  0x00007f85ab740045 in __GI_exit (status=status@entry=1) at exit.c:104
#9  0x00007f858ea32e03 in QXcbConnection::processXcbEvents (this=0x15354f0) at qxcbconnection.cpp:1685
#10 0x00007f85ac0fa109 in QObject::event (this=0x15354f0, e=<optimized out>) at kernel/qobject.cpp:1246
#11 0x00007f85aca393fc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x15354f0, e=0x7f858400afe0) at kernel/qapplication.cpp:3717
#12 0x00007f85aca40e07 in QApplication::notify (this=0x7fff97b4f210, receiver=0x15354f0, e=0x7f858400afe0) at kernel/qapplication.cpp:3476
#13 0x00007f85ac0cd128 in QCoreApplication::notifyInternal2 (receiver=0x15354f0, event=event@entry=0x7f858400afe0) at kernel/qcoreapplication.cpp:1018
#14 0x00007f85ac0cf62b in QCoreApplication::sendEvent (event=0x7f858400afe0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x15236a0) at kernel/qcoreapplication.cpp:1678
#16 0x00007f85ac0cfa98 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#17 0x00007f85ac1216b3 in postEventSourceDispatch (s=0x1586560) at kernel/qeventdispatcher_glib.cpp:276
#18 0x00007f85a344a197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f85a344a3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f85a344a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f85ac121abf in QEventDispatcherGlib::processEvents (this=0x1582b30, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#22 0x00007f85ac0cb30a in QEventLoop::exec (this=this@entry=0x7fff97b4f020, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#23 0x00007f85ac0d3db4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291
#24 0x00007f85ac4bb2cc in QGuiApplication::exec () at kernel/qguiapplication.cpp:1666
#25 0x00007f85aca39355 in QApplication::exec () at kernel/qapplication.cpp:2905
#26 0x000000000040bb96 in main (argc=1, argv=<optimized out>) at /workspace/build/app/main.cpp:763
Comment 3 Kevin Funk 2017-06-22 10:16:04 UTC 
Thanks for the heads-up, indeed looks like a duplicate. Marking as such.

*** This bug has been marked as a duplicate of bug 381123 ***