System.Exception: Error interpreting stacktypes for IL_0006:

[fanoI]

I were trying to port BigInteger to Cosmos the .NET version is too complex and will need to plug 99% of .NET so I've found this implementation that is really more simple:
http://www.codeproject.com/Articles/2728/C-BigInteger-Class

SingleImpl.cs is now using BigInteger as the range of float overcome that of ulong but now the code does not compile anymore this is the error:

6:44:13.265590 Msg: Detecting fields for type 'Cosmos.Debug.Common.Method'
06:44:13.281600 Msg: Error: Exception: System.Exception: Error compiling method 'SystemBooleanSystemSingleEqualsSystemObject': System.Exception: Error interpreting stacktypes for IL_0006: Brtrue ---> System.Exception: Invalid type in PopTypes! (Type = 'System.Single, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
06:44:13.283602 Msg: in Cosmos.IL2CPU.ILOpCodes.OpBranch.DoInterpretStackTypes(Boolean& aSituationChanged) in C:\Users\fano\Documents\GitHub\Cosmos\source\Cosmos.IL2CPU\ILOpCodes\OpBranch.cs:riga 115
06:44:13.284603 Msg: in Cosmos.IL2CPU.ILOpCode.InterpretStackTypes(IDictionary2 aOpCodes, Stack1 aStack, Boolean& aSituationChanged, Int32 aMaxRecursionDepth) in C:\Users\fano\Documents\GitHub\Cosmos\source\Cosmos.IL2CPU\ILOpCode.cs:riga 413
06:44:13.285604 Msg: --- Fine della traccia dello stack dell'eccezione interna ---

I suppose it is something done in BigInteger.cs as removing the variable declaration it compiles again.

[fanoI]

The "simplified" BigInteger ad not the methods Equals with the other parameter as BigInteger... the branch that actually failed was this one:
if (mantissa == 0)
where 'mantissa' was a BigInteger. Adding that method the problem gone away but after I started to get Stack Overflow!

[jp2masa]

This issue was moved to CosmosOS/IL2CPU#17