That's because the `Error` method is declared on the pointer, not the value. So `fmt` uses its reflect-based printing for structs.
On Sun, Sep 19, 2021 at 1:44 PM Brian Candler <b.cand...@pobox.com> wrote: > However, the zero value itself is printable. It's only a pointer to the > zero value which panics. > https://play.golang.org/p/LhmhdeHTb0m > > On Sunday, 19 September 2021 at 12:34:40 UTC+1 axel.wa...@googlemail.com > wrote: > >> I don't know if it's intentional, but I think it's expected. The panic >> happens because it tries to stringify the underlying error, which is nil. I >> would say the creation of a packages error types are the purview of that >> package. I don't think you can, generally, expect that their zero values >> are valid. >> >> On Sun, Sep 19, 2021 at 1:29 PM Brian Candler <b.ca...@pobox.com> wrote: >> >>> Is this intentional? >>> https://play.golang.org/p/ylXlkOq2sID >>> >>> Result I get in browser: >>> >>> &{0} >>> %!v(PANIC=Error method: runtime error: invalid memory address or nil >>> pointer dereference) >>> >>> -- >>> 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...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/golang-nuts/73b364e9-bb46-4ec6-9d3d-42e7b04772f5n%40googlegroups.com >>> <https://groups.google.com/d/msgid/golang-nuts/73b364e9-bb46-4ec6-9d3d-42e7b04772f5n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- > 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/a2ea19c3-cc2a-4265-8c24-9b79ea037dbbn%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/a2ea19c3-cc2a-4265-8c24-9b79ea037dbbn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CAEkBMfFgNq5c7RRHHgn32CVKprfF6Kke7u5G3ONR8Tt_%3DN0HUg%40mail.gmail.com.
