Kubuntu 18.04 / System Qt 5.9 / kdevelop master debug build / llvm+clang 9.0.0master debug build

$ gdb /usr/local/bin/kdevelop
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Reading symbols from /usr/local/bin/kdevelop...done.
(gdb) r
Starting program: /usr/local/bin/kdevelop 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffc40de700 (LWP 1661)]
...
...
[New Thread 0x7fff35503700 (LWP 3287)]
[Thread 0x7fff369f8700 (LWP 3178) exited]
[New Thread 0x7fff369f8700 (LWP 3290)]
[Thread 0x7fff369f8700 (LWP 3290) exited]
kdevelop: /var/2tb-hdd/llvm-project/clang/lib/Sema/Sema.cpp:370: clang::Sema::~Sema(): Assertion `DelayedTypos.empty() && "Uncorrected typos!"' failed.

Thread 16 "Queue(0x555555e" received signal SIGABRT, Aborted.
[Switching to Thread 0x7fff7a238700 (LWP 2681)]
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007ffff4441e97 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007ffff4443801 in __GI_abort () at abort.c:79
#2  0x00007ffff443339a in __assert_fail_base (fmt=0x7ffff45ba7d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7fff52642518 "DelayedTypos.empty() && \"Uncorrected typos!\"", file=file@entry=0x7fff526424e0 "/var/2tb-hdd/llvm-project/clang/lib/Sema/Sema.cpp", line=line@entry=370, function=function@entry=0x7fff5264b730 <clang::Sema::~Sema()::__PRETTY_FUNCTION__> "clang::Sema::~Sema()") at assert.c:92
#3  0x00007ffff4433412 in __GI___assert_fail (assertion=0x7fff52642518 "DelayedTypos.empty() && \"Uncorrected typos!\"", file=0x7fff526424e0 "/var/2tb-hdd/llvm-project/clang/lib/Sema/Sema.cpp", line=370, function=0x7fff5264b730 <clang::Sema::~Sema()::__PRETTY_FUNCTION__> "clang::Sema::~Sema()") at assert.c:101
#4  0x00007fff51ae02d5 in clang::Sema::~Sema() (this=0x7fff209a9d40, __in_chrg=<optimized out>) at /var/2tb-hdd/llvm-project/clang/lib/Sema/Sema.cpp:370
#5  0x00007fff53b51656 in std::default_delete<clang::Sema>::operator()(clang::Sema*) const (this=0x7fff20003b88, __ptr=0x7fff209a9d40) at /usr/include/c++/7/bits/unique_ptr.h:78
#6  0x00007fff53b45bb9 in std::unique_ptr<clang::Sema, std::default_delete<clang::Sema> >::~unique_ptr() (this=0x7fff20003b88, __in_chrg=<optimized out>) at /usr/include/c++/7/bits/unique_ptr.h:268
#7  0x00007fff53b2c79a in clang::ASTUnit::~ASTUnit() (this=0x7fff20003ac0, __in_chrg=<optimized out>) at /var/2tb-hdd/llvm-project/clang/lib/Frontend/ASTUnit.cpp:248
#8  0x00007fff5a108406 in clang_disposeTranslationUnit(CXTranslationUnit) (CTUnit=0x7fff2149f9b0) at /var/2tb-hdd/llvm-project/clang/tools/libclang/CIndex.cpp:4019
#9  0x00007fff5a58adc6 in ParseSessionData::~ParseSessionData() (this=0x7fff70a01c50, __in_chrg=<optimized out>) at /home/seraphim.local/a.minnekhanov/dev/kde/kdevelop/plugins/clang/duchain/parsesession.cpp:337
#10 0x00007fff5a58ae2e in ParseSessionData::~ParseSessionData() (this=0x7fff70a01c50, __in_chrg=<optimized out>) at /home/seraphim.local/a.minnekhanov/dev/kde/kdevelop/plugins/clang/duchain/parsesession.cpp:338
#11 0x00007fff5a4dcf29 in QExplicitlySharedDataPointer<ParseSessionData>::~QExplicitlySharedDataPointer() (this=0x7fff7a237890, __in_chrg=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qshareddata.h:165
#12 0x00007fff5a58b480 in ParseSession::~ParseSession() (this=0x7fff7a237890, __in_chrg=<optimized out>) at /home/seraphim.local/a.minnekhanov/dev/kde/kdevelop/plugins/clang/duchain/parsesession.cpp:399
#13 0x00007fff7801b9ca in ClangParseJob::run(QSharedPointer<ThreadWeaver::JobInterface>, ThreadWeaver::Thread*) (this=0x5555571f0370) at /home/seraphim.local/a.minnekhanov/dev/kde/kdevelop/plugins/clang/clangparsejob.cpp:308
#14 0x00007fffeaf96d8a in ThreadWeaver::IdDecorator::run(QSharedPointer<ThreadWeaver::JobInterface>, ThreadWeaver::Thread*) (this=<optimized out>, self=..., thread=0x7fff6c0025e0) at ./src/iddecorator.cpp:69
#15 0x00007fffeaf97368 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) (this=<optimized out>, job=..., thread=<optimized out>) at ./src/executor.cpp:52
#16 0x00007fffeaf95fd0 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) (this=<optimized out>, self=..., th=0x7fff6c0025e0) at ./src/job.cpp:83
#17 0x00007fffeaf95b2d in ThreadWeaver::Thread::run() (this=0x7fff6c0025e0) at ./src/thread.cpp:114
#18 0x00007ffff4c2916d in QThreadPrivate::start(void*) (arg=0x7fff6c0025e0) at thread/qthread_unix.cpp:368
#19 0x00007fffed11a6db in start_thread (arg=0x7fff7a238700) at pthread_create.c:463
#20 0x00007ffff452488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb)