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go/types: Identical panics with unreachable if first argument is nil #15173

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dominikh opened this issue Apr 7, 2016 · 1 comment
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go/types: Identical panics with unreachable if first argument is nil #15173

dominikh opened this issue Apr 7, 2016 · 1 comment
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Go1.7

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@dominikh
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dominikh commented Apr 7, 2016

Please answer these questions before submitting your issue. Thanks!

  1. What version of Go are you using (go version)?
    go version go1.6 linux/amd64
    go version devel +121c434 Thu Apr 7 09:57:06 2016 +0000 linux/amd64
  2. What operating system and processor architecture are you using (go env)?
    GOHOSTARCH="amd64"
    GOHOSTOS="linux"
  3. What did you do?
    Run http://play.golang.org/p/7MLy8FEed8
  4. What did you expect to see?
    I expected types.Identical to return false
  5. What did you see instead?
    It panics:
go run /tmp/foo.go         
func(i int) reflect.Value
panic: unreachable

goroutine 1 [running]:
panic(0x610f60, 0xc823c6b3a0)
    /usr/lib/go/src/runtime/panic.go:464 +0x3e6
go/types.unreachable()
    /usr/lib/go/src/go/types/errors.go:23 +0x65
go/types.identical(0x0, 0x0, 0x7f89526f0360, 0xc823c5e7e0, 0x0, 0xc82008a008)
    /usr/lib/go/src/go/types/predicates.go:281 +0x2f1
go/types.Identical(0x0, 0x0, 0x7f89526f0360, 0xc823c5e7e0, 0x0)
    /usr/lib/go/src/go/types/predicates.go:115 +0x48
main.main()
    /tmp/foo.go:23 +0x356
exit status 2
@bradfitz bradfitz added this to the Go1.7 milestone Apr 7, 2016
@bradfitz
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bradfitz commented Apr 7, 2016

/cc @alandonovan @griesemer

@golang golang locked and limited conversation to collaborators Apr 8, 2017
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