Comments (4)
I think the former is better.
from errors.
Also consider testing for behavior:
err := testErrWrap(3)
var wrappedErr interface { Unwrap() error }
if errors.As(err, &wrappedErr) {
fmt.Println(errors.Unwrap(err))
}
But also of note, errors.Wrap(…)
double wraps your error: one WithMessage
and one WithStack
. So using errors.Unwrap(err)
on the error from errors.Wrap(ErrRPC, "call rpc err")
will not give you ErrRPC
.
from errors.
@puellanivis , it seems the fmt.Println(errors.Cause(err))
could print the original error, and the output is error rpc
from errors.
Yes, errors.Cause
will strip out all wrapping done with this package, and any other error wraps that implement interface{ Cause() error }
though since a lot of packages are switching to native errors with fmt.Errorf("%w", err)
wrapping, this won’t help you there.
from errors.
Related Issues (20)
- Proposal: add errors.Is and errors.As
- RFC: Allow custom StackTraces
- func Is() does not works with errors.Wrap or errors.Wrapf HOT 3
- Cause() behavior has changed HOT 11
- respect -trimpath build flag HOT 3
- Unwrap doesn't return the base error HOT 7
- Questions about extending annotations HOT 5
- undefined errors.Wrap HOT 2
- How to change format return wrapped error message HOT 2
- Stacktrace don't print all stack HOT 6
- errors.Wrap() created bugs in our codebase. HOT 3
- StackTrace.Format with "%+v" includes a leading newline HOT 1
- A new error caused by another error HOT 7
- Demo
- Change Wrap() to return an error even if we provide nil HOT 3
- return *stack instead of stack HOT 2
- Wrap() duplicates call stack HOT 6
- `Errorf` should be able to wrap errors HOT 4
- Package errors looking for new maintainers HOT 4
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from errors.