I think you may be confused about fmt and error unwrapping. The fmt.Println() in your example code does *not *unwrap err1. When fmt.Errorf creates the error, the message is hard coded "fmt wrapping: error". The Println is just printing the result of err1.Error()
On Wednesday, September 2, 2020 at 12:04:29 PM UTC-4, simon place wrote: > > the example compares the print output of a fmt.errorf wrapped error and a > custom-error type wrapped error, the custom one isn't showing the wrapped > error., > > On Wednesday, 2 September 2020 16:58:31 UTC+1, burak serdar wrote: >> >> On Wed, Sep 2, 2020 at 9:48 AM 'simon place' via golang-nuts >> <golan...@googlegroups.com> wrote: >> > >> > import "github.com/pkg/errors" >> > >> > should be >> > >> > import "errors" >> > >> > left over from testing, but makes no difference, as expected. >> >> What were you expecting? >> >> > >> > -- >> > You received this message because you are subscribed to the Google >> Groups "golang-nuts" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> an email to golan...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/0d654a7b-dc92-432b-b152-91bd6ba68cf2o%40googlegroups.com. >> >> >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/25dc264d-0f90-40c8-bc12-6987865bf972o%40googlegroups.com.
