Generation of Message Pack fails with .Net 7

[mohamed-magdy]

Bug description

when i try to generate the message pack file using the mpc it crashes and gives me the following error message "System.IndexOutOfRangeException: Index was outside the bounds of the array.
at MessagePackCompiler.CodeAnalysis.TypeCollector.GetObjectInfo(INamedTypeSymbol type) in D:\a\1\s\src\MessagePack.GeneratorCore\CodeAnalysis\TypeCollector.cs:line 586
at MessagePackCompiler.CodeAnalysis.TypeCollector.CollectObject(INamedTypeSymbol type) in D:\a\1\s\src\MessagePack.GeneratorCore\CodeAnalysis\TypeCollector.cs:line 580
at MessagePackCompiler.CodeAnalysis.TypeCollector.CollectCore(ITypeSymbol typeSymbol) in D:\a\1\s\src\MessagePack.GeneratorCore\CodeAnalysis\TypeCollector.cs:line 381
at MessagePackCompiler.CodeAnalysis.TypeCollector.Collect() in D:\a\1\s\src\MessagePack.GeneratorCore\CodeAnalysis\TypeCollector.cs:line 301
at MessagePackCompiler.CodeGenerator.GenerateFileAsync(Compilation compilation, String output, String resolverName, String namespace, Boolean useMapMode, String multipleIfDirectiveOutputSymbols, String[] externalIgnoreTypeNames) in D:\a\1\s\src\MessagePack.GeneratorCore\CodeGenerator.cs:line 64
at MessagePack.Generator.MessagepackCompiler.RunAsync(String input, String output, String conditionalSymbol, String resolverName, String namespace, Boolean useMapMode, String multipleIfDirectiveOutputSymbols, String[] externalIgnoreTypeNames) in D:\a\1\s\src\MessagePack.Generator\MessagepackCompiler.cs:line 65
at ConsoleAppFramework.ConsoleAppEngine.RunCore(ConsoleAppContext ctx, Type type, MethodInfo methodInfo, String[] args, Int32 argsOffset)".

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Expected behavior

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Actual behavior

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• Version used: 2.5.124
• Runtime: .net 7.0

Additional context

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[AArnott]

Can you try using the source generator in the 2.6 prerelease? (docs in the README of the dev branch)
mpc is deprecated.

[Sean4572435243]

I looked at the readme changes here but I don't have a clue how to proceed with 2.6.100 without using mpc..Not using mpc just results in the expected "ClassLibrary1.Class1 is not registered in resolver" error. What are the steps?

[AArnott]

Those readme changes are too recent, perhaps. And incomplete, since you're only looking at a single commit. The readme at the tip of the develop branch is newer than the last prerelease to nuget.org at this point, so it'll be misleading unless you're using the latest CI build of the library from the develop branch.

Here's a precise link to exactly the readme content that is appropriate for the 2.6.100 prerelease on nuget.org. Hopefully that'll work for you.