Failing

After last pull, JunitTest_chart2_unoapi reliably fails for me on master 
on Win10 with this call stack:

ucrtbased.dll!issue_debug_notification(const wchar_t * const message) 
Line 28
        at minkernel\crts\ucrt\src\appcrt\internal\report_runtime_error.cpp(28)
ucrtbased.dll!__acrt_report_runtime_error(const wchar_t * message) Line 154
        at minkernel\crts\ucrt\src\appcrt\internal\report_runtime_error.cpp(154)
ucrtbased.dll!abort() Line 61
        at minkernel\crts\ucrt\src\appcrt\startup\abort.cpp(61)
ucrtbased.dll!common_assert_to_stderr<wchar_t>(const wchar_t * const 
expression, const wchar_t * const file_name, const unsigned int 
line_number) Line 187
        at minkernel\crts\ucrt\src\appcrt\startup\assert.cpp(187)
ucrtbased.dll!common_assert<wchar_t>(const wchar_t * const expression, 
const wchar_t * const file_name, const unsigned int line_number, void * 
const return_address) Line 420
        at minkernel\crts\ucrt\src\appcrt\startup\assert.cpp(420)
ucrtbased.dll!_wassert(const wchar_t * expression, const wchar_t * 
file_name, unsigned int line_number) Line 444
        at minkernel\crts\ucrt\src\appcrt\startup\assert.cpp(444)
vcllo.dll!ImplDbgTestSolarMutex() Line 46
        at c:\lo\src\core\vcl\source\app\dbggui.cxx(46)
tllo.dll!DbgTestSolarMutex() Line 78
        at c:\lo\src\core\tools\source\debug\debug.cxx(78)
vcllo.dll!OpenGLSalBitmap::Create(const Size & rSize, unsigned short 
nBits, const BitmapPalette & rBitmapPalette) Line 164
        at c:\lo\src\core\vcl\opengl\salbmp.cxx(164)
vcllo.dll!Bitmap::Bitmap(const Size & rSizePixel, unsigned short 
nBitCount, const BitmapPalette * pPal) Line 108
        at c:\lo\src\core\vcl\source\bitmap\bitmap.cxx(108)
vcllo.dll!o3tl::make_unique<Bitmap,Size &,unsigned short &>(Size & 
<args_0>, unsigned short & <args_1>) Line 29
        at c:\lo\src\core\include\o3tl\make_unique.hxx(29)
vcllo.dll!vcl::PNGReaderImpl::ImplReadHeader(const Size & 
rPreviewSizeHint) Line 665
        at c:\lo\src\core\vcl\source\gdi\pngread.cxx(665)
vcllo.dll!vcl::PNGReaderImpl::GetBitmapEx(const Size & rPreviewSizeHint) 
Line 342
        at c:\lo\src\core\vcl\source\gdi\pngread.cxx(342)
vcllo.dll!vcl::PNGReader::Read(const Size & i_rPreviewSizeHint) Line 1732
        at c:\lo\src\core\vcl\source\gdi\pngread.cxx(1732)
vcllo.dll!GraphicFilter::ImportGraphic(Graphic & rGraphic, const 
rtl::OUString & rPath, SvStream & rIStream, unsigned short nFormat, 
unsigned short * pDeterminedFormat, GraphicFilterImportFlags 
nImportFlags, 
com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> * 
pFilterData, const WmfExternal * pExtHeader) Line 1813
        at c:\lo\src\core\vcl\source\filter\graphicfilter.cxx(1813)
vcllo.dll!GraphicFilter::ImportGraphic(Graphic & rGraphic, const 
rtl::OUString & rPath, SvStream & rIStream, unsigned short nFormat, 
unsigned short * pDeterminedFormat, GraphicFilterImportFlags 
nImportFlags, const WmfExternal * pExtHeader) Line 1281
        at c:\lo\src\core\vcl\source\filter\graphicfilter.cxx(1281)
vcllo.dll!GraphicFilter::FilterCallback(ConvertData & rData) Line 2509
        at c:\lo\src\core\vcl\source\filter\graphicfilter.cxx(2509)
vcllo.dll!GraphicFilter::LinkStubFilterCallback(void * instance, 
ConvertData & data) Line 2481
        at c:\lo\src\core\vcl\source\filter\graphicfilter.cxx(2481)
sofficeapp.dll!Link<ConvertData &,bool>::Call(ConvertData & data) Line 84
        at c:\lo\src\core\include\tools\link.hxx(84)
sofficeapp.dll!desktop::Desktop::ImplInitFilterHdl(desktop::Desktop * 
__formal, ConvertData & rData) Line 1752
        at c:\lo\src\core\desktop\source\app\app.cxx(1752)
sofficeapp.dll!desktop::Desktop::LinkStubImplInitFilterHdl(void * 
instance, ConvertData & data) Line 1749
        at c:\lo\src\core\desktop\source\app\app.cxx(1749)
vcllo.dll!Link<ConvertData &,bool>::Call(ConvertData & data) Line 84
        at c:\lo\src\core\include\tools\link.hxx(84)
vcllo.dll!GraphicConverter::Import(SvStream & rIStm, Graphic & rGraphic, 
ConvertDataFormat nFormat) Line 44
        at c:\lo\src\core\vcl\source\gdi\cvtgrf.cxx(44)
chartcorelo.dll!chart::ChartModel::impl_loadGraphics(const 
com::sun::star::uno::Reference<com::sun::star::embed::XStorage> & 
xStorage) Line 621
        at c:\lo\src\core\chart2\source\model\main\chartmodel_persistence.cxx(621)
chartcorelo.dll!chart::ChartModel::impl_load(const 
com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> & 
rMediaDescriptor, const 
com::sun::star::uno::Reference<com::sun::star::embed::XStorage> & 
xStorage) Line 576
        at c:\lo\src\core\chart2\source\model\main\chartmodel_persistence.cxx(576)
chartcorelo.dll!chart::ChartModel::load(const 
com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> & 
rMediaDescriptor) Line 543
        at c:\lo\src\core\chart2\source\model\main\chartmodel_persistence.cxx(543)
chartcontrollerlo.dll!chart::ChartFrameLoader::load(const 
com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> & 
rMediaDescriptor, const 
com::sun::star::uno::Reference<com::sun::star::frame::XFrame> & xFrame) 
Line 170
        at c:\lo\src\core\chart2\source\controller\main\chartframeloader.cxx(170)
fwklo.dll!framework::LoadEnv::impl_loadContent() Line 1149
        at c:\lo\src\core\framework\source\loadenv\loadenv.cxx(1149)
fwklo.dll!framework::LoadEnv::startLoading() Line 383
        at c:\lo\src\core\framework\source\loadenv\loadenv.cxx(383)
fwklo.dll!framework::LoadEnv::loadComponentFromURL(const 
com::sun::star::uno::Reference<com::sun::star::frame::XComponentLoader> 
& xLoader, const 
com::sun::star::uno::Reference<com::sun::star::uno::XComponentContext> & 
xContext, const rtl::OUString & sURL, const rtl::OUString & sTarget, 
long nSearchFlags, const 
com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> & 
lArgs) Line 170
        at c:\lo\src\core\framework\source\loadenv\loadenv.cxx(170)
fwklo.dll!framework::Desktop::loadComponentFromURL(const rtl::OUString & 
sURL, const rtl::OUString & sTargetFrameName, long nSearchFlags, const 
com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> & 
lArguments) Line 619
        at c:\lo\src\core\framework\source\services\desktop.cxx(619)
mscx_uno.dll!`anonymous 
namespace'::cpp_call(bridges::cpp_uno::shared::UnoInterfaceProxy * 
pThis, bridges::cpp_uno::shared::VtableSlot aVtableSlot, 
_typelib_TypeDescriptionReference * pReturnTypeRef, long nParams, 
_typelib_MethodParameter * pParams, void * pUnoReturn, void * * 
pUnoArgs, _uno_Any * * ppUnoExc) Line 214
        at c:\lo\src\core\bridges\source\cpp_uno\msvc_win32_x86-64\uno2cpp.cxx(214)
mscx_uno.dll!unoInterfaceProxyDispatch(_uno_Interface * pUnoI, const 
_typelib_TypeDescription * pMemberTD, void * pReturn, void * * pArgs, 
_uno_Any * * ppException) Line 429
        at c:\lo\src\core\bridges\source\cpp_uno\msvc_win32_x86-64\uno2cpp.cxx(429)
binaryurplo.dll!binaryurp::IncomingRequest::execute_throw(binaryurp::BinaryAny 
* returnValue, 
std::vector<binaryurp::BinaryAny,std::allocator<binaryurp::BinaryAny> > 
* outArguments) Line 239
        at c:\lo\src\core\binaryurp\source\incomingrequest.cxx(239)
binaryurplo.dll!binaryurp::IncomingRequest::execute() Line 79
        at c:\lo\src\core\binaryurp\source\incomingrequest.cxx(79)
binaryurplo.dll!request(void * pThreadSpecificData) Line 83
        at c:\lo\src\core\binaryurp\source\reader.cxx(83)
cppu3.dll!cppu_threadpool::JobQueue::enter(__int64 nDisposeId, bool 
bReturnWhenNoJob) Line 108
        at c:\lo\src\core\cppu\source\threadpool\jobqueue.cxx(108)
cppu3.dll!cppu_threadpool::ORequestThread::run() Line 170
        at c:\lo\src\core\cppu\source\threadpool\thread.cxx(170)
cppu3.dll!threadFunc(void * param) Line 186
        at c:\lo\src\core\include\osl\thread.hxx(186)
sal3.dll!oslWorkerWrapperFunction(void * pData) Line 58
        at c:\lo\src\core\sal\osl\w32\thread.cxx(58)
ucrtbased.dll!invoke_thread_procedure(unsigned int(*)(void *) procedure, 
void * const context) Line 92
        at minkernel\crts\ucrt\src\appcrt\startup\thread.cpp(92)
ucrtbased.dll!thread_start<unsigned int (__cdecl*)(void * __ptr64)>(void 
* const parameter) Line 115
        at minkernel\crts\ucrt\src\appcrt\startup\thread.cpp(115)
kernel32.dll!BaseThreadInitThunk()
ntdll.dll!RtlUserThreadStart()

Apparently, locking solar mutex is needed somewhere in the calling stack.

-- 
Best regards,
Mike Kaganski