ImplDbgTestSolarMutex assert from a11y

 #5  0x00007fffee606a72 in ImplDbgTestSolarMutex() () at vcl/source/app/dbggui.cxx:35
 #6  0x00007ffff71186f0 in DbgTestSolarMutex() () at tools/source/debug/debug.cxx:54
 #7  0x00007ffff3273e39 in SfxBroadcaster::RemoveListener(SfxListener&) (this=0x1a38230, rListener=...) at svl/source/notify/SfxBroadcaster.cxx:105
 #8  0x00007ffff3296eb8 in SfxListener::~SfxListener() (this=0x33abce0) at svl/source/notify/lstner.cxx:53
 #9  0x00007fffaaa0a0a4 in ScAccessibleContextBase::~ScAccessibleContextBase() (this=0x33abc40) at sc/source/ui/Accessibility/AccessibleContextBase.cxx:59
 #10 0x00007fffaaaa6379 in ScAccessibleTableBase::~ScAccessibleTableBase() (this=0x33abc40) at sc/source/ui/Accessibility/AccessibleTableBase.cxx:52
 #11 0x00007fffaaa831da in ScAccessibleSpreadsheet::~ScAccessibleSpreadsheet() (this=0x33abc40) at sc/source/ui/Accessibility/AccessibleSpreadsheet.cxx:274
 #12 0x00007fffaaa83229 in ScAccessibleSpreadsheet::~ScAccessibleSpreadsheet() (this=0x33abc40) at sc/source/ui/Accessibility/AccessibleSpreadsheet.cxx:270
 #13 0x00007ffff5f87fc0 in cppu::OWeakObject::release() (this=0x33abc40) at cppuhelper/source/weak.cxx:230
 #14 0x00007ffff5f88690 in cppu::OWeakAggObject::release() (this=0x33abc40) at cppuhelper/source/weak.cxx:296
 #15 0x00007ffff5e7e4d5 in cppu::WeakAggComponentImplHelperBase::release() (this=0x33abc40) at cppuhelper/source/implbase.cxx:211
 #16 0x00007fffaaa0d875 in cppu::WeakAggComponentImplHelper5<com::sun::star::accessibility::XAccessible, com::sun::star::accessibility::XAccessibleComponent, com::sun::star::accessibility::XAccessibleContext, com::sun::star::accessibility::XAccessibleEventBroadcaster, com::sun::star::lang::XServiceInfo>::release() (this=0x33abc40)
     at include/cppuhelper/compbase5.hxx:142
 #17 0x00007fffaaa0ab15 in ScAccessibleContextBase::release() (this=0x33abc40) at sc/source/ui/Accessibility/AccessibleContextBase.cxx:119
 #18 0x00007fffaaaa6b75 in ScAccessibleTableBase::release() (this=0x33abc40) at sc/source/ui/Accessibility/AccessibleTableBase.cxx:86
 #19 0x00007fffd8f4f11a in com::sun::star::uno::Reference<com::sun::star::accessibility::XAccessible>::clear()
     (this=<error reading variable: Unhandled DWARF expression opcode 0x0>) at include/com/sun/star/uno/Reference.hxx:231
 #20 0x00007fffd8f4c41d in atk_object_wrapper_finalize(_GObject*) (obj=0x7f71930) at vcl/unx/gtk3/a11y/atkwrapper.cxx:662
 #21 0x00007ffff3538d32 in g_object_unref (_object=<optimized out>) at ../gobject/gobject.c:3678
 #22 g_object_unref (_object=0x7f71930) at ../gobject/gobject.c:3553
 #23 0x00007fffd9571fc5 in expiry_func () at /lib64/libatk-bridge-2.0.so.0
 #24 0x00007fffea7197b1 in g_timeout_dispatch (source=0x313d360, callback=0x7fffd9571f60 <expiry_func>, user_data=0x7fffbc01bec0) at ../glib/gmain.c:4971
 #25 0x00007fffea718faf in g_main_dispatch (context=0x5f8230) at ../glib/gmain.c:3417

Change-Id: If527f1cf1bfc59bb8df586afaf5da62bbcb08eea
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/142691
Tested-by: Jenkins
Reviewed-by: Christian Lohmaier <[email protected]>

vcl/unx/gtk3/a11y/atkwrapper.cxx

@@ -643,6 +643,7 @@ atk_object_wrapper_finalize (GObject *obj)
     if( pWrap->mpAccessible.is() )
     {
         ooo_wrapper_registry_remove( pWrap->mpAccessible );
+        SolarMutexGuard aGuard;
         pWrap->mpAccessible.clear();
     }