Details
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Bug
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Resolution: Invalid
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P2: Important
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None
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6.3.0
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Windows
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61bfe87a6 (dev), c7375ed4c (6.5), 416565fd1 (tqtc/lts-6.2), 376b33add (6.4)
Description
When trying to exit the app, the destructor of QNetworkAccessManager hangs printing
"No TLS backend is available"
Application is using Qt6.3.0 build from source with linked openssl and plugins like qopensslbackend are manually imported.
Following are the stack trace
ntdll!NtWaitForSingleObject+0x14 KERNELBASE!WaitForSingleObjectEx+0x8e myapp!QThread::wait+0xf0 myapp!QThread::~QThread+0x9a myapp!QThread::`vector deleting destructor'+0x14 myapp!QNetworkAccessManagerPrivate::destroyThread+0x82 myapp!QNetworkAccessManagerPrivate::`vector deleting destructor'+0x24 It gets stuck waiting for the network manager thread to exit. This is the call stack of the network manager thread: ntdll!NtWaitForAlertByThreadId+0x14 ntdll!RtlpWaitOnAddressWithTimeout+0x81 ntdll!RtlpWaitOnCriticalSection+0x1a1 ntdll!RtlpEnterCriticalSectionContended+0x18c ntdll!RtlEnterCriticalSection+0x42 myapp!__acrt_lock_and_call::__l2::<lambda_638799b9deba96c50f710eeac98168cd>::operator()+0x7 [minkernel\crts\ucrt\inc\corecrt_internal.h @ 977] myapp!__crt_seh_guarded_call<int>::operator()<<lambda_638799b9deba96c50f710eeac98168cd>,<lambda_22ebabd17bc4fa466a2aca6d8deb888d> &,<lambda_a6f7d7db0129f75315ebf26d50c089f1> >+0x1c [VCCRT\vcruntime\inc\internal_shared.h @ 201] myapp!__acrt_lock_and_call+0x28 [minkernel\crts\ucrt\inc\corecrt_internal.h @ 976] myapp!_register_onexit_function+0x42 [minkernel\crts\ucrt\src\appcrt\startup\onexit.cpp @ 149] myapp!_onexit+0x18 [d:\a01\_work\6\s\src\vctools\crt\vcstartup\src\utility\utility.cpp @ 261] myapp!atexit+0x9 [d:\a01\_work\6\s\src\vctools\crt\vcstartup\src\utility\utility.cpp @ 275] myapp!lcSsl+0x70 myapp!QSslCertificatePrivate::QSslCertificatePrivate+0x65 myapp!QSslCertificate::QSslCertificate+0x2a myapp!QTlsPrivate::TlsCryptographOpenSSL::cancelCAFetch+0x34 myapp!QSslSocket::close+0x2d myapp!QHttpNetworkConnectionPrivate::~QHttpNetworkConnectionPrivate+0x6e myapp!QHttpNetworkConnectionPrivate::`vector deleting destructor'+0x14 myapp!QObject::~QObject+0x749 myapp!QNetworkAccessCachedHttpConnection::`vector deleting destructor'+0x20 myapp!QNetworkAccessCache::clear+0x13b myapp!QNetworkAccessCache::~QNetworkAccessCache+0x18 myapp!QNetworkAccessCache::`vector deleting destructor'+0x14 myapp!QThreadStorageData::finish+0x1e7 myapp!QThreadPrivate::finish+0xaa myapp!QThreadPrivate::start+0x13d
it seems that probably there is some problem with the way Qt's qopensslbackend is unloading when the application is exits.