Crash when switching to session containing Creator while debugging Creator

1. I opened the following Creator from the SDK:

   Qt Creator 4.5.0
   Based on Qt 5.10.0 (GCC 5.3.1 20160406 (Red Hat 5.3.1-6), 64 bit)
   Built on Dec 4 2017 04:11:21
   From revision fcea6ceba6
   

2. I then opened a session that contains my self-built Creator (93a5aa98212db6c30d65cd8c5d3106aaa2b6ce54) so that I could try to get a stacktrace for a crash that I was getting in that self-built Creator.
3. Started debugging.
4. Opened the same session that I opened in the SDK Creator above (the crash I was trying to reproduce happens when importing an existing Creator build), and get this crash:

   c
   1  write                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     syscall-template.S 84  0x7ffff59d94bd 
   2  ??                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               0x7ffff5dedef1 
   3  ??                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               0x7ffff5de2928 
   4  ??                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               0x7ffff5dee991 
   5  QProcess::waitForFinished(int)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   0x7ffff5de317d 
   6  ProjectExplorer::ProcessExtraCompiler::runInThread(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             extracompiler.cpp  425 0x7fffcd5ae1f8 
   7  Utils::Internal::MemberCallable<void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&)>::operator()(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&) const                                                                                                                                                                                                                                                                                                                                                                                                                                                                 runextensions.h    223 0x7fffcd5b575b 
   8  Utils::Internal::runAsyncQFutureInterfaceDispatch<QHash<Utils::FileName, QByteArray>, Utils::Internal::MemberCallable<void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&)>, Utils::FileName, Utils::FileName, QStringList, std::function<QByteArray ()>, Utils::Environment>(std::integral_constant<bool, true>, QFutureInterface<QHash<Utils::FileName, QByteArray>>, Utils::Internal::MemberCallable<void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&)>&&, Utils::FileName&&, Utils::FileName&&, QStringList&&, std::function<QByteArray ()>&&, Utils::Environment&&) runextensions.h    253 0x7fffcd5b5642 
   9  Utils::Internal::runAsyncMemberDispatch<QHash<Utils::FileName, QByteArray>, Utils::Internal::MemberCallable<void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&)>, Utils::FileName, Utils::FileName, QStringList, std::function<QByteArray ()>, Utils::Environment, void>(QFutureInterface<QHash<Utils::FileName, QByteArray>>, Utils::Internal::MemberCallable<void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&)>&&, Utils::FileName&&, Utils::FileName&&, QStringList&&, std::function<QByteArray ()>&&, Utils::Environment&&)                                         runextensions.h    270 0x7fffcd5b5562 
   10 Utils::Internal::runAsyncImpl<QHash<Utils::FileName, QByteArray>, Utils::Internal::MemberCallable<void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&)>, Utils::FileName, Utils::FileName, QStringList, std::function<QByteArray ()>, Utils::Environment>(QFutureInterface<QHash<Utils::FileName, QByteArray>>, Utils::Internal::MemberCallable<void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&)>&&, Utils::FileName&&, Utils::FileName&&, QStringList&&, std::function<QByteArray ()>&&, Utils::Environment&&)                                                         runextensions.h    299 0x7fffcd5b5424 
   11 Utils::Internal::runAsyncMemberDispatch<QHash<Utils::FileName, QByteArray>, void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&), ProjectExplorer::ProcessExtraCompiler *, Utils::FileName, Utils::FileName, QStringList, std::function<QByteArray ()>, Utils::Environment, void>(QFutureInterface<QHash<Utils::FileName, QByteArray>>, void (ProjectExplorer::ProcessExtraCompiler:: *&&)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&), ProjectExplorer::ProcessExtraCompiler *&&, Utils::FileName&&, Utils::FileName&&, QStringList&&, std::function<QByteArray ()>&&, Utils::Environment&&)                       runextensions.h    281 0x7fffcd5b52ab 
   12 Utils::Internal::runAsyncImpl<QHash<Utils::FileName, QByteArray>, void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&), ProjectExplorer::ProcessExtraCompiler *, Utils::FileName, Utils::FileName, QStringList, std::function<QByteArray ()>, Utils::Environment>(QFutureInterface<QHash<Utils::FileName, QByteArray>>, void (ProjectExplorer::ProcessExtraCompiler:: *&&)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&), ProjectExplorer::ProcessExtraCompiler *&&, Utils::FileName&&, Utils::FileName&&, QStringList&&, std::function<QByteArray ()>&&, Utils::Environment&&)                                       runextensions.h    299 0x7fffcd5b513f 
   13 Utils::Internal::AsyncJob<QHash<Utils::FileName, QByteArray>, void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&), ProjectExplorer::ProcessExtraCompiler *, Utils::FileName, Utils::FileName, QStringList, std::function<QByteArray ()> const&, Utils::Environment>::runHelper<0ul, 1ul, 2ul, 3ul, 4ul, 5ul, 6ul>(std::integer_sequence<unsigned long, 0ul, 1ul, 2ul, 3ul, 4ul, 5ul, 6ul>)                                                                                                                                                                                                                                                                                                                                                                        runextensions.h    368 0x7fffcd5b4fb8 
   14 Utils::Internal::AsyncJob<QHash<Utils::FileName, QByteArray>, void (ProjectExplorer::ProcessExtraCompiler:: *)(QFutureInterface<QHash<Utils::FileName, QByteArray>>&, Utils::FileName const&, Utils::FileName const&, QStringList const&, std::function<QByteArray ()> const&, Utils::Environment const&), ProjectExplorer::ProcessExtraCompiler *, Utils::FileName, Utils::FileName, QStringList, std::function<QByteArray ()> const&, Utils::Environment>::run()                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        runextensions.h    348 0x7fffcd5b4aa5 
   15 ??                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               0x7ffff5c8d042 
   16 ??                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               0x7ffff5c90c3a 
   17 start_thread                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              pthread_create.c   333 0x7ffff59d06ba 
   18 clone                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     clone.S            109 0x7ffff516e41d 
   

Full backtrace attached.