gRPC的Go实现，其返回的error为什么不用fmt.Errorf()？

比如你要返回一个gorm.ErrRecordNotFound，那么gRPC的调用者最终收到的error的信息会是这样：

rpc error: code = Unknown desc = 

调用者想这么判断error：

if errors.Is(err, gorm.ErrRecordNotFound)

会返回false

用errors.As也不行

errors.As(err, &gorm.ErrRecordNotFound)

在运行测试的时候会报错：second argument to errors.As should not be *error

GPT的解释：The error message you're seeing is because errors.As expects a pointer to an interface as its second argument. However, gorm.ErrRecordNotFound is a value of type error, not an interface type.

Support error unwrapping (errors.As) · Issue #2934 · grpc/grpc-goGitHub