Common Language Runtime detected an invalid program

[tskong]

Hi,

We've recently ported an asp.net framework application to .net core 6. We've also updated the nhibernate libraries to their .net core equivalents, but we are hitting some strange errors. We are getting the error "Common Language Runtime detected an invalid program" and it's happening somewhere deep inside nhibernate

What could be causing this issue? I've checked the dlls all they are all .net 6.

 System.InvalidProgramException: Common Language Runtime detected an invalid program.
   at System.Reflection.Emit.DynamicMethod.CreateDelegate(Type delegateType, Object target)
   at System.Linq.Expressions.Compiler.LambdaCompiler.CreateDelegate()
   at System.Linq.Expressions.Compiler.LambdaCompiler.Compile(LambdaExpression lambda)
   at System.Linq.Expressions.Expression`1.Compile()
   at NHibernate.Linq.ExpressionToHqlTranslationResults.MergeLambdasAndCompile[TDelegate](IList`1 itemTransformers)
   at NHibernate.Linq.ExpressionToHqlTranslationResults..ctor(HqlTreeNode statement, IList`1 itemTransformers, IList`1 listTransformers, IList`1 postExecuteTransformers, List`1 additionalCriteria, Type executeResultTypeOverride)
   at NHibernate.Linq.IntermediateHqlTree.GetTranslation()
   at NHibernate.Linq.NhLinqExpression.Translate(ISessionFactoryImplementor sessionFactory, Boolean filter)
   at NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 filters, ISessionFactoryImplementor factory)
  

[fredericDelaporte]

That seems bound to a Linq query. Can you share the Linq query triggering this?

[tskong]

It's quite difficult as it's all tied in with many layers of application code. My initial thought was that it was because the linq was running some code in a .net framework 4 assembly, but then I found one that worked and one that didn't, and they are both .net core assemblies.