WinUI 3 app hangs on exit: MapGeocoder.dll is unwisely running destructors in DllMain DLL_PROCESS_DETACH

[mfeingol]

Describe the bug

I have a WinUI app that hangs on shutdown during ExitProcess(). The hang appears to occur when I use the Bing Maps geocoding functionality in the Windows.Services.Maps namespace, specifically MapLocationFinder.FindLocationsAsync or MapLocationFinder.FindLocationsAtAsync. Calling something else like MapRouteFinder.GetDrivingRouteAsync doesn't seem to have the same problem.

Given that calling a .NET API shouldn't result in a corrupted process, it seemed worth filing the issue. This impacts single-instance apps because they will detect a running instance but won't be able to redirect activation parameters, resulting in a hang on the new process as well.

Stack trace and minidump follow:

Hang.zip

0:000> k
 # Child-SP          RetAddr               Call Site
00 000000d9`0877f6a8 00007ffb`94e9c89f     ntdll!NtWaitForSingleObject+0x14
01 000000d9`0877f6b0 00007ffa`a09e59a4     KERNELBASE!WaitForSingleObjectEx+0xaf
02 000000d9`0877f750 00007ffa`a09f2839     MapConfiguration!Pal::TimerImplWinRT::cancel+0xc4
03 000000d9`0877f790 00007ffa`a09efacf     MapConfiguration!MapControl::ConfigurationManager::stopTimer+0x25
04 000000d9`0877f7c0 00007ffa`a09db52d     MapConfiguration!MapControl::ConfigurationManager::~ConfigurationManager+0x3f
05 000000d9`0877f7f0 00007ffa`a09ed06b     MapConfiguration!std::default_delete<MapControl::ConfigurationManager>::operator()+0x15
06 000000d9`0877f820 00007ffa`a09db5d4     MapConfiguration!ConfigurationManagerAdapter::~ConfigurationManagerAdapter+0x37
07 000000d9`0877f850 00007ffa`a09dba5e     MapConfiguration!ConfigurationManagerAdapter::`vector deleting destructor'+0x14
08 000000d9`0877f880 00007ffa`77fb0a64     MapConfiguration!Microsoft::WRL::Details::RuntimeClassImpl<Microsoft::WRL::RuntimeClassFlags<1>,1,1,0,IConfigurationManager>::Release+0x5e
09 000000d9`0877f8b0 00007ffa`77fd512d     MapGeocoder!Microsoft::WRL::ComPtr<Windows::Foundation::IAsyncOperation<Windows::Services::Maps::LocalSearch::LocalLocationFinderResult * __ptr64> >::InternalRelease+0x20
0a 000000d9`0877f8e0 00007ffa`77fd5164     MapGeocoder!MapControl::Finder::SearchManager::~SearchManager+0x21
0b 000000d9`0877f910 00007ffa`77fb3e35     MapGeocoder!MapControl::Finder::SearchManager::`vector deleting destructor'+0x14
0c 000000d9`0877f940 00007ffa`77fae866     MapGeocoder!DllMain+0x51
0d 000000d9`0877f970 00007ffb`978bd860     MapGeocoder!dllmain_dispatch+0x8e
0e 000000d9`0877f9d0 00007ffb`97980bc0     ntdll!LdrpCallInitRoutine+0xb0
0f 000000d9`0877fcb0 00007ffb`9797fd84     ntdll!LdrShutdownProcess+0x260
10 000000d9`0877fdc0 00007ffb`968618ab     ntdll!RtlExitUserProcess+0x114
11 000000d9`0877fdf0 00007ffb`952b0543     kernel32!ExitProcessImplementation+0xb
12 000000d9`0877fe20 00007ff7`e34f225f     ucrtbase!common_exit+0xc7
13 000000d9`0877fe80 00007ffb`9684e8d7     Sideroads_exe!__scrt_common_main_seh+0x173 [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl @ 295] 
14 000000d9`0877fec0 00007ffb`9797fbcc     kernel32!BaseThreadInitThunk+0x17
15 000000d9`0877fef0 00000000`00000000     ntdll!RtlUserThreadStart+0x2c

Steps to reproduce the bug

In a WinUI3 app, use geocoding services from Windows.Services.Maps, then exit the process normally.

Expected behavior

No hangs on shutdown.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.6.3: 1.6.241114003

Windows version

Windows 11 (24H2): Build 26100

Additional context

No response

[karkarl]

The MapServices api is with Bing API and not WinAppSDK.

[mfeingol]

The MapServices api is with Bing API and not WinAppSDK.

OK. Any ideas on where this bug should be filed?

[riverar]

These APIs are deprecated. They are not likely to get fixed and you're not likely to get any support for them. Time to find an alternative I'm afraid.

Here's a migration guide: https://learn.microsoft.com/azure/azure-maps/migrate-bing-maps-overview