Possible fix

ModuleWriter.ooc

// We eliminate any generic variable that is passed as a "true" function argument
// E.g. in __va_call: inline func <T> (f: Func <T> (T), T: Class, arg: T)
typeArgs := fDecl typeArgs filter(|arg| !fDecl args contains?(arg))
/* Step 3 : write generic type args */
            for(typeArg in typeArgs) {
                if(isFirst) isFirst = false
                else hw app(", ")
                hw app(typeArg getName())
            }


            /* Step 4 : write real args */
            for(arg in fDecl args) {
                if(isFirst) isFirst = false
                else hw app(", ")
                if(arg instanceOf?(VarArg)) hw app("...")
                else hw app(arg getName())
            }