[Bug 36902] New: valgrind shows an unitialized variable in dlls/ieframe/tests/ie.c (nsLayoutStatics::Initialize)

https://bugs.winehq.org/show_bug.cgi?id=36902

Bug ID: 36902
           Summary: valgrind shows an unitialized variable in
                    dlls/ieframe/tests/ie.c (nsLayoutStatics::Initialize)
           Product: Wine
           Version: 1.7.22
          Hardware: x86
                OS: Linux
            Status: NEW
          Keywords: download, source, testcase, valgrind
          Severity: normal
          Priority: P2
         Component: ieframe
          Assignee: [e-mail]
          Reporter: [e-mail]

==1236== Conditional jump or move depends on uninitialised value(s)
==1236==    at 0x1040032C: nsFocusManager::Release (in
/home/austin/.wine/drive_c/windows/system32/gecko/2.24/wine_gecko/xul.dll)
==1236==    by 0x100DC893: nsPrefBranch::AddObserver (nsprefbranch.cpp:641)
==1236==    by 0x100D8578: mozilla::Preferences::AddWeakObserver
(preferences.cpp:1411)
==1236==    by 0x10117D70: nsLayoutStatics::Initialize
(nslayoutstatics.cpp:244)
==1236==    by 0x109DA397: nsComponentManagerImpl::CreateInstanceByContractID
(nscomponentmanager.cpp:1089)
==1236==    by 0x109DA807: nsComponentManagerImpl::GetServiceByContractID
(nscomponentmanager.cpp:1449)
==1236==    by 0x109B458A: CallGetService (nscomponentmanagerutils.cpp:62)
==1236==    by 0x109B977E: NS_InitXPCOM2 (nsxpcominit.cpp:489)
==1236==    by 0x75E81B3: init_xpcom (nsembed.c:698)
==1236==    by 0x75E8626: load_gecko (nsembed.c:774)
==1236==    by 0x75ED013: create_nscontainer (nsembed.c:2042)
==1236==    by 0x756D477: HTMLDocument_Create (htmldoc.c:4756)
==1236==    by 0x75D7178: ClassFactory_CreateInstance (main.c:238)
==1236==    by 0x4EEE0A2: CoCreateInstance (unknwn.h:226)
==1236==    by 0x4E152B2: create_mime_object (binding.c:258)
==1236==    by 0x4E15652: create_object (binding.c:308)
==1236==    by 0x4E181E8: report_data (binding.c:1077)
==1236==    by 0x4E18531: InternetProtocolSink_ReportData (binding.c:1126)
==1236==    by 0x4E1D8F0: ProtocolSinkHandler_ReportData (urlmon.h:3113)
==1236==    by 0x4E1E441: report_data_proc (urlmon.h:3113)
==1236==  Uninitialised value was created by a client request
==1236==    at 0x7BC4C4D6: mark_block_uninitialized (heap.c:209)
==1236==    by 0x7BC4C641: initialize_block (heap.c:240)
==1236==    by 0x7BC50F4D: RtlAllocateHeap (heap.c:1717)
==1236==    by 0x782A76B: msvcrt_heap_alloc (heap.c:70)
==1236==    by 0x782B330: MSVCRT_malloc (heap.c:408)
==1236==    by 0x80C71095: moz_xmalloc (mozalloc.cpp:54)
==1236==    by 0x109B96F7: NS_InitXPCOM2 (nsxpcominit.cpp:464)
==1236==    by 0x75E81B3: init_xpcom (nsembed.c:698)
==1236==    by 0x75E8626: load_gecko (nsembed.c:774)
==1236==    by 0x75ED013: create_nscontainer (nsembed.c:2042)
==1236==    by 0x756D477: HTMLDocument_Create (htmldoc.c:4756)
==1236==    by 0x75D7178: ClassFactory_CreateInstance (main.c:238)
==1236==    by 0x4EEE0A2: CoCreateInstance (unknwn.h:226)
==1236==    by 0x4E152B2: create_mime_object (binding.c:258)
==1236==    by 0x4E15652: create_object (binding.c:308)
==1236==    by 0x4E181E8: report_data (binding.c:1077)
==1236==    by 0x4E18531: InternetProtocolSink_ReportData (binding.c:1126)
==1236==    by 0x4E1D8F0: ProtocolSinkHandler_ReportData (urlmon.h:3113)
==1236==    by 0x4E1E441: report_data_proc (urlmon.h:3113)
==1236==    by 0x4E1A10E: process_tasks (bindprot.c:57)
==1236==

I see several variations of this pattern, here's the exact suppression I'm
using for this issue:
{
   <insert_a_suppression_name_here>
   Memcheck:Cond
   fun:nsFocusManager::Release
   ...
   fun:nsLayoutStatics::Initialize
   fun:nsComponentManagerImpl::CreateInstanceByContractID
   fun:nsComponentManagerImpl::GetServiceByContractID
   fun:CallGetService
   fun:NS_InitXPCOM2
   fun:init_xpcom
   fun:load_gecko
   fun:create_nscontainer
   fun:HTMLDocument_Create
   fun:ClassFactory_CreateInstance
   fun:CoCreateInstance
   fun:create_mime_object
   fun:create_object
   fun:report_data
   fun:InternetProtocolSink_ReportData
   fun:ProtocolSinkHandler_ReportData
   ...
}