Compiler generated Process function in go will swallow exceptions defined in thrift IDL

result := ResultType{}
var retval *ResponseType
if retval, err2 = p.handler.Handler(ctx, args.Request); err2 != nil {
	tickerCancel()
	switch v := err2.(type) {
	case *ThriftIDLDefinedExceptionType:
		result.Err = v
	default:
		if err2 == thrift.ErrAbandonRequest {
			return false, thrift.WrapTException(err2)
		}
		x := thrift.NewTApplicationException(thrift.INTERNAL_ERROR, "Internal error processing authenticateCookie: "+err2.Error())
		oprot.WriteMessageBegin(ctx, "handler", thrift.EXCEPTION, seqId)
		x.Write(ctx, oprot)
		oprot.WriteMessageEnd(ctx)
		oprot.Flush(ctx)
		return true, thrift.WrapTException(err2)
	}
} else {
	result.Success = retval
}
tickerCancel()
if err3 := oprot.WriteMessageBegin(ctx, "handler", thrift.REPLY, seqId); err3 != nil {
	err = thrift.WrapTException(err3)
}
if err4 := result.Write(ctx, oprot); err == nil && err4 != nil {
	err = thrift.WrapTException(err4)
}
if err5 := oprot.WriteMessageEnd(ctx); err == nil && err5 != nil {
	err = thrift.WrapTException(err5)
}
if err6 := oprot.Flush(ctx); err == nil && err6 != nil {
	err = thrift.WrapTException(err6)
}
if err != nil {
	return
}
return true, err