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reflect: unexpected non-empty PkgPath on tip #16328

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ianlancetaylor opened this issue Jul 12, 2016 · 2 comments
Closed

reflect: unexpected non-empty PkgPath on tip #16328

ianlancetaylor opened this issue Jul 12, 2016 · 2 comments
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Go1.7

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@ianlancetaylor
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This program panics on tip but exits normally with earlier versions of Go.

package main

import (
    "reflect"
)

type S struct {}

func (s *S) Get() int { return 0 }

type I interface {
    F(*S)
}

func main() {
    ft := reflect.TypeOf((*I)(nil)).Elem()
    m := ft.Method(0)
    mt := m.Type
    for i := 0; i < mt.NumIn(); i++ {
        if mt.In(i).PkgPath() != "" {
            panic(mt.In(i).PkgPath())
        }
    }
}
@ianlancetaylor ianlancetaylor added this to the Go1.7 milestone Jul 12, 2016
@ianlancetaylor
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Simpler case:

package main

import (
    "reflect"
)

type S struct {}

func (s *S) Get() int { return 0 }

func main() {
    st := reflect.TypeOf((*S)(nil))
    if st.PkgPath() != "" {
        panic(st.PkgPath())
    }
}

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CL https://golang.org/cl/24862 mentions this issue.

@golang golang locked and limited conversation to collaborators Jul 12, 2017
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@crawshaw @ianlancetaylor @gopherbot