Fails to compile in TwinCat 4026 due to NullReferenceException

[djonas171]

When used in the newest TwinCat version 4026 i compiler change have made the library unable to compile.
I have isolated the issue, it seems to originate from Matrix Accessors:
GetTransposeMatrixAccessor
GetSubMatrixAccessor
GetShrunkMatrixAccessor
It seems that it fails due to the methods returning a FB which have been initialized with "THIS^".

I have contacted Beckhoff, as it is unknown if this due to an error in 4026 or the new compiler behavior is correct. I will follow up, with their respone when possible.

Error Internal error:System.NullReferenceException: Object reference not set to an instance of an object.
at _3S.CoDeSys.Compiler35200.ImplicitCode.InterfaceHierarchy.AddInterfaceHierarchy(IInterfaceHierarchy ih, Int32 nIdBaseToLookup)
at _3S.CoDeSys.Compiler35200.ImplicitCode.InterfaceHierarchy.Initialize(IScope5 scope, _ISignature sign, Int32& Index)
at _3S.CoDeSys.Compiler35200.ImplicitCode.InterfaceSignatureGenerator.AddInterfaceHierarchy(_ISignature sign, IScope5 gscope)
at _3S.CoDeSys.Compiler35200.ImplicitCode.InterfaceSignatureGenerator.AddInterfaceSignaturesAfterTypify(_ICompileContext comconNew, _ICompileContext comconRef)
at _3S.CoDeSys.Compiler35200.CompilerPhases.CompilerPhase2_AfterTypification.DoAfterTypificationActions(Boolean bErrorsOccured)
at _3S.CoDeSys.Compiler35200.CompilerPhases.CompilerPhase1_Typifier.TypifyAll()
at _3S.CoDeSys.Compiler35200.CompilerPhases.CompilerPhaseControllerCompile.Compile(Boolean bDoTypification, Boolean bCallWaitForDownloadInfoSavingCallback, Boolean bCheckAll)