cmd/link, reflect: difference in output depending what is linked in

[dsnet]

Using 7b9d3ff

Consider the following program:

type Iface interface{}

type Foo struct{}

func (f *Foo) Foo() Iface { return nil }

type Bar struct{}

func (f *Bar) bar() Iface { return nil }

func main() {
    _ = reflect.ValueOf(&Foo{}).Type() // THIS

    t := reflect.ValueOf(&Bar{}).Type()
    for i := 0; i < t.NumMethod(); i++ {
        fmt.Println(t.Method(i))
    }
}

With the line labelled THIS present, the program properly outputs:
{bar main func(*main.Bar) main.Iface <func(*main.Bar) main.Iface Value> 0}

However, with the THIS line commented out, the program fails to output anything at all. The difference in output indicates that something is off since the line in question only pertains to the Foo type, while the subsequent lines only pertain to the Bar type.

This may be related to the comment by @reusee in #15673

/cc @crawshaw, @reusee, @rsc

[dsnet]

Closing this, and re-opening #15673.