NullReferenceException when running against .net 8 assembly

[ddechant-bvc]

I am running the following against a .net 8 assembly:

mddocs apireference --assemblies "C:\Git\...\bin\Debug\net8.0\Assembly.dll" --outdir "C:\Git\....\docs"

Which results in the following exception being thrown:

INFORMATION - Reading XML documentation comments from 'C:\Git\...\bin\Debug\net8.0\Assembly.xml'
Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object.
   at Grynwald.MdDocs.Common.ParameterDefinitionExtensions.<>c.<GetCustomAttributes>b__0_0(CustomAttribute attribute) in /_/src/MdDocs.Common/_Extensions/_Cecil/ParameterDefinitionExtensions.cs:line 31
   at System.Linq.Utilities.<>c__DisplayClass1_0`1.<CombinePredicates>b__0(TSource x)
   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
   at Grynwald.MdDocs.ApiReference.Model.CSharpDefinitionFormatter.AppendCustomAttributes(StringBuilder definitionBuilder, IEnumerable`1 customAttributes, Boolean singleLine) in /_/src/MdDocs.ApiReference/Model/_Helpers/CSharpDefinitionFormatter.cs:line 362
   at Grynwald.MdDocs.ApiReference.Model.CSharpDefinitionFormatter.GetDefinition(ParameterDefinition parameter) in /_/src/MdDocs.ApiReference/Model/_Helpers/CSharpDefinitionFormatter.cs:line 747
   at System.Linq.Enumerable.SelectIListIterator`2.MoveNext()
   at System.Text.StringBuilder.AppendJoinCore[T](Char& separator, Int32 separatorLength, IEnumerable`1 values)
   at System.Text.StringBuilder.AppendJoin[T](String separator, IEnumerable`1 values)
   at Grynwald.MdDocs.ApiReference.Model.CSharpDefinitionFormatter.GetDefinition(MethodDefinition method) in /_/src/MdDocs.ApiReference/Model/_Helpers/CSharpDefinitionFormatter.cs:line 235
   at Grynwald.MdDocs.ApiReference.Model.MethodLikeOverloadDocumentation..ctor(MethodDefinition definition, IXmlDocsProvider xmlDocsProvider) in /_/src/MdDocs.ApiReference/Model/MethodLikeOverloadDocumentation.cs:line 64
   at Grynwald.MdDocs.ApiReference.Model.ConstructorOverloadDocumentation..ctor(ConstructorDocumentation methodDocumentation, MethodDefinition definition, IXmlDocsProvider xmlDocsProvider) in /_/src/MdDocs.ApiReference/Model/ConstructorOverloadDocumentation.cs:line 29
   at Grynwald.MdDocs.ApiReference.Model.ConstructorDocumentation.<>c__DisplayClass5_0.<.ctor>b__1(MethodDefinition d) in /_/src/MdDocs.ApiReference/Model/ConstructorDocumentation.cs:line 42
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Enumerable.ToDictionary[TSource,TKey](IEnumerable`1 source, Func`2 keySelector, IEqualityComparer`1 comparer)
   at Grynwald.MdDocs.ApiReference.Model.ConstructorDocumentation..ctor(TypeDocumentation typeDocumentation, IEnumerable`1 definitions, IXmlDocsProvider xmlDocsProvider) in /_/src/MdDocs.ApiReference/Model/ConstructorDocumentation.cs:line 41
   at Grynwald.MdDocs.ApiReference.Model.TypeDocumentation..ctor(AssemblyDocumentation assemblyDocumentation, NamespaceDocumentation namespaceDocumentation, TypeDefinition definition, IXmlDocsProvider xmlDocsProvider, ILogger logger, TypeDocumentation declaringType) in /_/src/MdDocs.ApiReference/Model/TypeDocumentation.cs:line 237
   at Grynwald.MdDocs.ApiReference.Model.AssemblySetDocumentation.LoadTypeRecursively(AssemblyDocumentation assemblyDocumentation, IXmlDocsProvider xmlDocsProvider, TypeDefinition typeDefinition, TypeDocumentation declaringType) in /_/src/MdDocs.ApiReference/Model/AssemblySetDocumentation.cs:line 185
   at Grynwald.MdDocs.ApiReference.Model.AssemblySetDocumentation.LoadAssemblies(IReadOnlyList`1 assemblyDefinitions) in /_/src/MdDocs.ApiReference/Model/AssemblySetDocumentation.cs:line 170
   at Grynwald.MdDocs.ApiReference.Model.AssemblySetDocumentation..ctor(IReadOnlyList`1 assemblyDefinitions, IXmlDocsProvider xmlDocsProvider, ILogger logger) in /_/src/MdDocs.ApiReference/Model/AssemblySetDocumentation.cs:line 61
   at Grynwald.MdDocs.ApiReference.Model.AssemblySetDocumentation.FromAssemblyFiles(IEnumerable`1 filePaths, ILogger logger) in /_/src/MdDocs.ApiReference/Model/AssemblySetDocumentation.cs:line 116
   at Grynwald.MdDocs.ApiReference.Commands.ApiReferenceCommand.Execute() in /_/src/MdDocs.ApiReference/Commands/ApiReferenceCommand.cs:line 31
   at Grynwald.MdDocs.Program.OnApiReferenceCommand(ILogger logger, ApiReferenceOptions opts) in /_/src/MdDocs/Program.cs:line 59
   at Grynwald.MdDocs.Program.<>c.<Main>b__0_1(ApiReferenceOptions opts) in /_/src/MdDocs/Program.cs:line 31
   at CommandLine.ParserResultExtensions.MapResult[T1,T2,TResult](ParserResult`1 result, Func`2 parsedFunc1, Func`2 parsedFunc2, Func`2 notParsedFunc)
   at Grynwald.MdDocs.Program.Main(String[] args) in /_/src/MdDocs/Program.cs:line 28

The same extract runs properly against the same assembly when it is built with .net 6.

[ap0llo]

Thanks for reporting.

At first glance, seems like the compiler adds an attribute which is not handled properly.