PythonTest_pyuno_pytests_testcollections had failed with -fsanitize=address:

> ==6341==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address 0x7ffe5cf77048 at pc 0x7f6be12e51ba bp 0x7ffe5cf76810 sp 0x7ffe5cf76808
> WRITE of size 8 at 0x7ffe5cf77048 thread T0
>     #0 0x7f6be12e51b9 in x86_64::fill_struct(_typelib_TypeDescriptionReference*, unsigned long const*, double const*, void*) bridges/source/cpp_uno/gcc3_linux_x86-64/abi.cxx
>     #1 0x7f6be1307f03 in gcc3::callVirtualMethod(void*, unsigned int, void*, _typelib_TypeDescriptionReference*, bool, unsigned long*, unsigned int, unsigned long*, double*) bridges/source/cpp_uno/gcc3_linux_x86-64/callvirtualmethod.cxx:171:17
>     #2 0x7f6be130346d in cpp_call(bridges::cpp_uno::shared::UnoInterfaceProxy*, bridges::cpp_uno::shared::VtableSlot, _typelib_TypeDescriptionReference*, int, _typelib_MethodParameter*, void*, void**, _uno_Any**) bridges/source/cpp_uno/gcc3_linux_x86-64/uno2cpp.cxx:233:13
>     #3 0x7f6be1301c56 in bridges::cpp_uno::shared::unoInterfaceProxyDispatch(_uno_Interface*, _typelib_TypeDescription const*, void*, void**, _uno_Any**) bridges/source/cpp_uno/gcc3_linux_x86-64/uno2cpp.cxx:420:13
>     #4 0x7f6be0be09ff in stoc_corefl::IdlInterfaceMethodImpl::invoke(com::sun::star::uno::Any const&, com::sun::star::uno::Sequence<com::sun::star::uno::Any>&) stoc/source/corereflection/criface.cxx:679:9
>     #5 0x7f6be0be304c in non-virtual thunk to stoc_corefl::IdlInterfaceMethodImpl::invoke(com::sun::star::uno::Any const&, com::sun::star::uno::Sequence<com::sun::star::uno::Any>&) stoc/source/corereflection/criface.cxx
>     #6 0x7f6be0375ef9 in (anonymous namespace)::IntrospectionAccessStatic_Impl::getPropertyValueByIndex(com::sun::star::uno::Any const&, int) const stoc/source/inspect/introspection.cxx:609:33
>     #7 0x7f6be03753eb in (anonymous namespace)::IntrospectionAccessStatic_Impl::getPropertyValue(com::sun::star::uno::Any const&, rtl::OUString const&) const stoc/source/inspect/introspection.cxx:519:16
>     #8 0x7f6be036bd75 in (anonymous namespace)::ImplIntrospectionAccess::getPropertyValue(rtl::OUString const&) stoc/source/inspect/introspection.cxx:1040:26
>     #9 0x7f6be037102c in non-virtual thunk to (anonymous namespace)::ImplIntrospectionAccess::getPropertyValue(rtl::OUString const&) stoc/source/inspect/introspection.cxx
>     #10 0x7f6be0f95805 in stoc_inv::Invocation_Impl::getValue(rtl::OUString const&) stoc/source/invocation/invocation.cxx:495:35
>     #11 0x7f6be0f95fcc in non-virtual thunk to stoc_inv::Invocation_Impl::getValue(rtl::OUString const&) stoc/source/invocation/invocation.cxx
>     #12 0x7f6be665d69a in pyuno::PyUNO_getattr(_object*, char*) pyuno/source/module/pyuno.cxx:1424:52
>     #13 0x7f6bf34b1a5f in PyObject_GetAttr workdir/UnpackedTarball/python3/Objects/object.c:894:16
>     #14 0x7f6bf39f10f9 in PyEval_EvalFrameEx workdir/UnpackedTarball/python3/Python/ceval.c:2793:29
...

Change-Id: I7c8aa0f0e153a022c19c981165730725a566a0b2
Reviewed-on: https://gerrit.libreoffice.org/42946Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>