Universal Windows Platform (UWP)
A Microsoft platform for building and publishing apps for Windows desktop devices.
2,833 questions
MissingMetadataException: Can't seem to figure out where reflction is used
Shimmy Weitzhandler
246
Reputation points
Hi,
I'm trying to run my app in release mode, and I get the following output when the program crashes:
Exception thrown: 'System.Reflection.MissingMetadataException' in System.Private.Reflection.Core.dll
This operation cannot be carried out because metadata for the following object was removed for performance reasons:\n\n EETypeRva:0x0002E180\n\nNo further information is available. Rebuild in debug mode for better information.\n\n
I think I covered all NuGet packages to the .rd.xml file and tried to be as inclusive as possible, and the issue still persists.
Is there a way to pin down the source of the error, i.e. the source that uses reflection? Is there any analyzer for this?
Here's what the .rd.xml file looks like:
xml
<Directives xmlns="http://schemas.microsoft.com/netfx/2013/01/metadata">
<Application>
<!--
An Assembly element with Name="*Application*" applies to all assemblies in
the application package. The asterisks are not wildcards.
-->
<Namespace Name="MyProject" Serialize="Required All" />
<Namespace Name="MyProject.ViewModels" Serialize="Required All" />
<Namespace Name="MyProject.Views" Serialize="Required All" />
<!-- Add your application specific runtime directives here. -->
<Assembly Name="Microsoft.Extensions.Hosting" Dynamic="Required All" />
<Assembly Name="Microsoft.Extensions.Options" Dynamic="Required All" />
<Assembly Name="Microsoft.Extensions.Logging" Dynamic="Required All" />
<Assembly Name="Microsoft.Extensions.DependencyInjection" Dynamic="Required All" />
<Assembly Name="Splat.Microsoft.Extensions.Logging" Dynamic="Required All" />
<Assembly Name="Splat.Microsoft.Extensions.DependencyInjection" Dynamic="Required All" />
<Assembly Name="CommonServiceLocator" Dynamic="Required All" />
<Assembly Name="ReactiveUI" Dynamic="Required All" />
<Assembly Name="ReactiveUI.Fody" Dynamic="Required All" />
<Assembly Name="ReactiveUI.Uno" Dynamic="Required All" />
<Assembly Name="Uno.Core" Dynamic="Required All" />
<Assembly Name="Uno.Microsoft.Xaml.Behaviors.Uwp.Managed" Dynamic="Required All" />
<Type Name="Microsoft.Extensions.Options.OptionsMonitor`1[TOptions]" Dynamic="Required All" />
<Type Name="Microsoft.Extensions.Logging.Console.ConsoleLoggerOptions" Dynamic="Required All"/>
</Application>
</Directives>
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Roy Li - MSFT 32,231 Reputation points Microsoft Vendor2020-07-06T06:08:24.58+00:00 Could you please go to Debug-> Options-> General and uncheck the Enable Just My Code option? Then you could run it again and see if the debugger would break in the place that uses reflection.
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Shimmy Weitzhandler 246 Reputation points
2020-07-06T07:16:14.047+00:00 Unfortunately that didn't change anything.
After the app is being stuck for a minute, it crashes with the following error message:
The Debug output print is as follows:
.... (trimmed) ...
'MyProject.Uno.exe' (Win32): Loaded 'C:\Windows\System32\threadpoolwinrt.dll'. Skipped loading symbols. Module is native, and native debugging is currently disabled.
Exception thrown: 'System.Reflection.MissingMetadataException' in System.Private.Reflection.Core.dll
This operation cannot be carried out because metadata for the following object was removed for performance reasons:\n\n EETypeRva:0x0002E180\n\nNo further information is available. Rebuild in debug mode for better information.\n\nThe program '[16160] MyProject.Uno.exe' has exited with code -1 (0xffffffff).
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Shimmy Weitzhandler 246 Reputation points
2020-07-06T07:29:31.613+00:00 Thanks for your reply,
Unfortunately that didn't change anything.
After the app is being stuck for a minute, it crashes with the following error message:The Debug output print is as follows:
.... (trimmed) ...
'MyProject.Uno.exe' (Win32): Loaded 'C:\Windows\System32\threadpoolwinrt.dll'. Skipped loading symbols. Module is native, and native debugging is currently disabled.
Exception thrown: 'System.Reflection.MissingMetadataException' in System.Private.Reflection.Core.dll
This operation cannot be carried out because metadata for the following object was removed for performance reasons:\n\n EETypeRva:0x0002E180\n\nNo further information is available. Rebuild in debug mode for better information.\n\nThe program '[16160] MyProject.Uno.exe' has exited with code -1 (0xffffffff).
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Roy Li - MSFT 32,231 Reputation points Microsoft Vendor
2020-07-08T02:51:41+00:00 Could you please turn on the .net native option in debug mode? That could show more information about the exception.
And I've found a document that might be helpful to troubleshoot the issue: Reflection and .NET Native
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Shimmy Weitzhandler 246 Reputation points
2020-07-08T03:57:54.407+00:00 I didn't know you could actually do that 😳
Will try and let you know -
Shimmy Weitzhandler 246 Reputation points
2020-07-08T04:40:23.043+00:00 Thanks for bearing with me @RoyLi-MSFT
I made sure to add<Assembly Name="System.Reactive" Dynamic="Required All" />to .rd.xml file and here's the result:
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Roy Li - MSFT 32,231 Reputation points Microsoft Vendor
2020-07-08T07:41:41.307+00:00 The Observable.FromEventPattern method comes from System.Reactive.Linq Namespace. Could you please try to add this namespace into the rd.xml file? Or you could just add the single method following this method troubleshooter.
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Shimmy Weitzhandler 246 Reputation points
2020-07-08T10:08:38.187+00:00 After adding
<Namespace Name="System.Reactive.Linq" Serialize="Required All" />to the .rd.xml file the issue still persists.
Are there apps that are simply not meant for .NET Native? -
Roy Li - MSFT 32,231 Reputation points Microsoft Vendor
2020-07-09T09:52:59.23+00:00 Does it break in the same method? Or there are other methods that cause the issue too?
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Shimmy Weitzhandler 246 Reputation points
2020-07-09T09:55:57.237+00:00 There might be other following ones, but with the line I added it still breaks at the same place.
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Roy Li - MSFT 32,231 Reputation points Microsoft Vendor
2020-07-10T07:25:52.483+00:00 I'm trying to consult other engineers about this. There might be some time delay.
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Shimmy Weitzhandler 246 Reputation points
2020-07-10T07:56:02.677+00:00 I really appreciate this, and moreover do I appreciate your update!
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Roy Li - MSFT 32,231 Reputation points Microsoft Vendor
2020-07-14T02:30:52.697+00:00 Hi, sorry for the delay. Could you please try to disable the Optimize code options and run the app in release mode again? You could find it in project properties-> Build->> General. Make sure you have set the mode as release mode.
Another thing that I want to ask is that did you add all the dlls into the rd.xml?
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