[MonoDevelop] Installing on Mac OS X

[Herr Witten]

How can I fix the following that I get when I run make:


Internal() warning CS0162: Unreachable code detected
Exception caught by the compiler while compiling:
    Block that caused the problem begin at: 
././Internal/Parser/PersistenceLayer/PersistentProperty.cs: (34)
                      Block being compiled: 
[././Internal/Parser/PersistenceLayer/PersistentProperty.cs: 
(38),Internal: (1)]
System.NullReferenceException: Object reference not set to an instance 
of an object
         in String.Concat (string, string, string)
         in TypeManager.GetMethod (System.Type, string, System.Type[], 
bool, bool)
         in Binary.DoResolve (Mono.CSharp.EmitContext)
         in Expression.Resolve (Mono.CSharp.EmitContext, 
Mono.CSharp.ResolveFlags)
         in Expression.Resolve (Mono.CSharp.EmitContext)
         in Binary.DoResolve (Mono.CSharp.EmitContext)
         in Expression.Resolve (Mono.CSharp.EmitContext, 
Mono.CSharp.ResolveFlags)
         in Expression.Resolve (Mono.CSharp.EmitContext)
         in Cast.DoResolve (Mono.CSharp.EmitContext)
         in Expression.Resolve (Mono.CSharp.EmitContext, 
Mono.CSharp.ResolveFlags)
         in Expression.Resolve (Mono.CSharp.EmitContext)
         in InvocationOrCast.DoResolve (Mono.CSharp.EmitContext)
         in Expression.Resolve (Mono.CSharp.EmitContext, 
Mono.CSharp.ResolveFlags)
         in Expression.Resolve (Mono.CSharp.EmitContext)
         in Assign.DoResolve (Mono.CSharp.EmitContext)
         in Expression.Resolve (Mono.CSharp.EmitContext, 
Mono.CSharp.ResolveFlags)
         in Expression.Resolve (Mono.CSharp.EmitContext)
         in ExpressionStatement.ResolveStatement 
(Mono.CSharp.EmitContext)
         in StatementExpression.Resolve (Mono.CSharp.EmitContext)
         in Block.Resolve (Mono.CSharp.EmitContext)
         in Block.Resolve (Mono.CSharp.EmitContext)
         in EmitContext.EmitTopBlock (Mono.CSharp.Block, 
Mono.CSharp.InternalParameters, Mono.CSharp.Location)