I was surprised to see Printf %v panic on a struct that %#v prints fine. Is
this expected / intentional / as designed?
Test case:
package main
import (
"fmt"
)
type MyError struct{ error }
func main() {
err := MyError{}
fmt.Printf("%%#v %#v\n", err)
fmt.Printf("%%+v %+v\n", err)
fmt.Printf("%%v %v\n", err)
}
Output:
%#v main.MyError{error:error(nil)}
%+v %!v(PANIC=runtime error: invalid memory address or nil pointer dereference)
%v %!v(PANIC=runtime error: invalid memory address or nil pointer dereference)
Playground: https://play.golang.org/p/B5FeWMryN0
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