Type kotlinx.serialization.BinaryFormat is defined multiple times

[jethro-djan]

Android framework version

net9.0-android

Affected platform version

.NET 9.0.101

Description

I am trying to compile a Xamarin.android project which was recently converted to .NET MAUI using the upgrade-assistant and making all the necessary changes in files and .csproj.

I suddenly started having issues with the dependencies so I decided to upgrade all of them to the latest versions. I resolved all the issues associated to this #764 but I can't fix this one.

It seems to me that MAUI crucially depends on xamarin.android.jetbrains.kotlinx_serialization_core_jvm version 1.3.1. However, some packages in my project also depend on Xamarin.KotlinX.Serialization.Core.Jvm version 1.7.3.1. The class in question is defined in both.

How do I resolve this? I can't remove either without errors.

Relevant log output

`
0>: Error JAVA0000 java: Error in /Users/[user]/.nuget/packages/xamarin.android.jetbrains.kotlinx_serialization_core_jvm/1.3.1/buildTransitive/../jar/org.jetbrains.kotlinx.kotlinx-serialization-core-jvm.jar:kotlinx/serialization/BinaryFormat.class:
Type kotlinx.serialization.BinaryFormat is defined multiple times: /Users/[user]/.nuget/packages/xamarin.android.jetbrains.kotlinx_serialization_core_jvm/1.3.1/buildTransitive/../jar/org.jetbrains.kotlinx.kotlinx-serialization-core-jvm.jar:kotlinx/serialization/BinaryFormat.class, obj/Debug/net9.0-android/lp/679/jl/libs/623E6E29E2058512.jar:kotlinx/serialization/BinaryFormat.class
Compilation failed
java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: /Users/[user]/.nuget/packages/xamarin.android.jetbrains.kotlinx_serialization_core_jvm/1.3.1/buildTransitive/../jar/org.jetbrains.kotlinx.kotlinx-serialization-core-jvm.jar
kotlinx/serialization/BinaryFormat.class
	at com.android.tools.r8.internal.to.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:131)
	at com.android.tools.r8.D8.main(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:5)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: /Users/[user]/.nuget/packages/xamarin.android.jetbrains.kotlinx_serialization_core_jvm/1.3.1/buildTransitive/../jar/org.jetbrains.kotlinx.kotlinx-serialization-core-jvm.jar:kotlinx/serialization/BinaryFormat.class
	at Version.fakeStackEntry(Version_8.5.35.java:0)
	at com.android.tools.r8.T.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:5)
	at com.android.tools.r8.internal.to.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:82)
	at com.android.tools.r8.internal.to.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:32)
	at com.android.tools.r8.internal.to.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:31)
	at com.android.tools.r8.internal.to.b(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:2)
	at com.android.tools.r8.D8.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:41)
	at com.android.tools.r8.D8.b(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:13)
	at com.android.tools.r8.D8.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:39)
	at com.android.tools.r8.internal.to.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:118)
	... 1 more
Caused by: com.android.tools.r8.internal.g: Type kotlinx.serialization.BinaryFormat is defined multiple times: /Users/[user]/.nuget/packages/xamarin.android.jetbrains.kotlinx_serialization_core_jvm/1.3.1/buildTransitive/../jar/org.jetbrains.kotlinx.kotlinx-serialization-core-jvm.jar:kotlinx/serialization/BinaryFormat.class, obj/Debug/net9.0-android/lp/679/jl/libs/623E6E29E2058512.jar:kotlinx/serialization/BinaryFormat.class
	at com.android.tools.r8.internal.x50.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:21)
	at com.android.tools.r8.internal.LY.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:54)
	at com.android.tools.r8.internal.LY.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:10)
	at java.base/java.util.concurrent.ConcurrentHashMap.merge(ConcurrentHashMap.java:2056)
	at com.android.tools.r8.internal.LY.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:6)
	at com.android.tools.r8.graph.p4$a.d(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:6)
	at com.android.tools.r8.dex.c.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:95)
	at com.android.tools.r8.dex.c.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:44)
	at com.android.tools.r8.dex.c.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:9)
	at com.android.tools.r8.D8.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:44)
	at com.android.tools.r8.D8.d(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:17)
	at com.android.tools.r8.D8.c(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:73)
	at com.android.tools.r8.internal.to.a(R8_8.5.35_9c55004e7c41a17b1ed47c4e1952cb6778b3dac6afb6afc113a2737c3cde13e0:28)
	... 6 more
Directory 'obj/Debug/net9.0-android/lp/679' is from 'Xamarin.KotlinX.Serialization.Core.Jvm.aar'.

[moljac]

Thanks for the feedback.

Please see:

#764

Otherwise provide list of PackageReferences so we can investigate.

[moljac]

OK I just saw

I suddenly started having issues with the dependencies so I decided to upgrade all of them to the latest versions. I resolved all the issues associated to this #764 but I can't fix this one.

Yes it is very problem (app) specific - dependencies, transitive dependencies.

[jethro-djan]

So I tracked it down to removing Microsoft.Maui.Controls. Then I reverted some of the packages back to previous versions that don't depend on Serialization.Core. Then I could safely remove Xamarin.KotlinX.Serialization.Core.Jvm version 1.7.3.1. Now I am unable to compile due to another error (which I don't think is related to this but would appreciate any pointers as to how to resolve).

NuGet package '<unknown>' version '<unknown>' contains a shared library 'libavutil.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details

The particular library that is not correctly aligned keeps changing.

Or could it be that removing the package caused this?

[moljac]

Error

NuGet package '' version '' contains a shared library 'libavutil.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details

is very different from

Type T is defined multiple times

where T in your case is kotlinx.serialization.BinaryFormat

1st one is Warning for now:

https://learn.microsoft.com/en-us/dotnet/android/messages/xa0141

Android uses 4kB pages and in the future it will be 16 kB. This warning is for authors of nugets that have native shared (*.so) libraries which will be need recompilation with 16 kB page size.