go vet is crash

[mei-rune]

Please answer these questions before submitting your issue. Thanks!

1. What version of Go are you using (go version)?
   go version go1.7 windows/amd64
2. What operating system and processor architecture are you using (go env)?
   set GOARCH=amd64
   set GOBIN=
   set GOEXE=.exe
   set GOHOSTARCH=amd64
   set GOHOSTOS=windows
   set GOOS=windows
   set GOPATH=d:\developing\go\xxx..\3td;d:\developing\go\xxx
   set GORACE=
   set GOROOT=d:\tools\go_amd64
   set GOTOOLDIR=d:\tools\go_amd64\pkg\tool\windows_amd64
   set CC=gcc
   set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0 -fdebug-prefix-map=C:\Users\xxx\AppData\Local\Temp\go-build765068130=/tmp/go-build -gno-record-gcc-switches
   set CXX=g++
   set CGO_ENABLED=1
3. What did you do?
   I run "go vet"
4. What did you expect to see?

panic: inconsistent import:
    var bufio.ErrInvalidUnreadByte error
previously imported as:
    var ErrInvalidUnreadByte error
 [recovered]
    panic: inconsistent import:
    var bufio.ErrInvalidUnreadByte error
previously imported as:
    var ErrInvalidUnreadByte error


goroutine 1 [running]:
panic(0x68c640, 0xc042d04060)
    c:/go/src/runtime/panic.go:500 +0x1af
go/types.(*Checker).handleBailout(0xc0420942a0, 0xc04285f8d8)
    c:/go/src/go/types/check.go:213 +0xb5
panic(0x68c640, 0xc042d04060)
    c:/go/src/runtime/panic.go:458 +0x251
go/internal/gcimporter.(*importer).declare(0xc042389d40, 0x814620, 0xc04271a460)
    c:/go/src/go/internal/gcimporter/bimport.go:175 +0x183
go/internal/gcimporter.(*importer).obj(0xc042389d40, 0xfffffffffffffffc)
    c:/go/src/go/internal/gcimporter/bimport.go:195 +0x1bb
go/internal/gcimporter.BImportData(0xc0420571d0, 0xc042a78000, 0x1802a, 0x1fe00, 0xc0423db1f1, 0x5, 0x0, 0x5, 0x10, 0x10)
    c:/go/src/go/internal/gcimporter/bimport.go:88 +0x397
go/internal/gcimporter.Import(0xc0420571d0, 0xc0423db1f1, 0x5, 0x6e7604, 0x1, 0xc04211ab40, 0x0, 0x0)
    c:/go/src/go/internal/gcimporter/gcimporter.go:166 +0x558
go/importer.gcimports.ImportFrom(0xc0420571d0, 0xc0423db1f1, 0x5, 0x6e7604, 0x1, 0x0, 0x4, 0x8, 0x0)
    c:/go/src/go/importer/importer.go:70 +0x6e
go/types.(*Checker).collectObjects(0xc0420942a0)
    c:/go/src/go/types/resolver.go:191 +0x82d
go/types.(*Checker).checkFiles(0xc0420942a0, 0xc042085200, 0x29, 0x40, 0x0, 0x0)
    c:/go/src/go/types/check.go:225 +0xb1
go/types.(*Checker).Files(0xc0420942a0, 0xc042085200, 0x29, 0x40, 0xc0424dec90, 0xc04202f960)
    c:/go/src/go/types/check.go:218 +0x50
go/types.(*Config).Check(0xc042117c80, 0xc042005828, 0x8, 0xc0420099c0, 0xc042085200, 0x29, 0x40, 0xc042474870, 0x200, 0xc04201e000, ...)
    c:/go/src/go/types/api.go:344 +0x1aa
main.(*Package).check(0xc042015a40, 0xc0420099c0, 0xc042085200, 0x29, 0x40, 0x0, 0xc04252e500)
    c:/go/src/cmd/vet/types.go:76 +0x377
main.doPackage(0x6e7604, 0x1, 0xc04206a010, 0x29, 0x29, 0x0, 0x1)
    c:/go/src/cmd/vet/main.go:336 +0x9a0
main.main()
    c:/go/src/cmd/vet/main.go:244 +0x34c
exit status 2

[QuentinPerez]

Same issue with go tool vet --all=true ./pkg on the github.com/scaleway/scaleway-cli repository

$ go version
go version go1.7 darwin/amd64

$ go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/quentinperez/go"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/5r/_xh_6_fs0h16qgqvrdygnd540000gn/T/go-build825551204=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"

$ go tool vet --all=true ./pkg
panic: inconsistent import:
        var bufio.ErrInvalidUnreadByte error
previously imported as:
        var ErrInvalidUnreadByte error
 [recovered]
        panic: inconsistent import:
        var bufio.ErrInvalidUnreadByte error
previously imported as:
        var ErrInvalidUnreadByte error


goroutine 1 [running]:
panic(0x2734c0, 0xc42066c2d0)
        /usr/local/go/src/runtime/panic.go:500 +0x1a1
go/types.(*Checker).handleBailout(0xc4200b6540, 0xc4205d74a0)
        /usr/local/go/src/go/types/check.go:213 +0xae
panic(0x2734c0, 0xc42066c2d0)
        /usr/local/go/src/runtime/panic.go:458 +0x243
go/internal/gcimporter.(*importer).declare(0xc42006c270, 0x3f44a0, 0xc42065f040)
        /usr/local/go/src/go/internal/gcimporter/bimport.go:175 +0x17c
go/internal/gcimporter.(*importer).obj(0xc42006c270, 0xfffffffffffffffc)
        /usr/local/go/src/go/internal/gcimporter/bimport.go:195 +0x1b4
go/internal/gcimporter.BImportData(0xc420018fc0, 0xc4204da000, 0x17e41, 0x1fe00, 0xc4207ce811, 0x5, 0x0, 0x5, 0x10, 0x10)
        /usr/local/go/src/go/internal/gcimporter/bimport.go:88 +0x390
go/internal/gcimporter.Import(0xc420018fc0, 0xc4207ce811, 0x5, 0xc42022f280, 0xc, 0xc4203570e0, 0x0, 0x0)
        /usr/local/go/src/go/internal/gcimporter/gcimporter.go:166 +0x551
go/importer.gcimports.ImportFrom(0xc420018fc0, 0xc4207ce811, 0x5, 0xc42022f280, 0xc, 0x0, 0xc4203ad900, 0x0, 0x0)
        /usr/local/go/src/go/importer/importer.go:70 +0x67
go/types.(*Checker).collectObjects(0xc4200b6540)
        /usr/local/go/src/go/types/resolver.go:191 +0x826
go/types.(*Checker).checkFiles(0xc4200b6540, 0xc4206ab200, 0x27, 0x40, 0x0, 0x0)
        /usr/local/go/src/go/types/check.go:225 +0xaa
go/types.(*Checker).Files(0xc4200b6540, 0xc4206ab200, 0x27, 0x40, 0xc42085cab0, 0xc42043d518)
        /usr/local/go/src/go/types/check.go:218 +0x49
go/types.(*Config).Check(0xc420864140, 0xc42025a270, 0x8, 0xc42089a9c0, 0xc4206ab200, 0x27, 0x40, 0xc42085a8c0, 0x0, 0xc4200001a0, ...)
        /usr/local/go/src/go/types/api.go:344 +0x1a3
main.(*Package).check(0xc420840420, 0xc42089a9c0, 0xc4206ab200, 0x27, 0x40, 0x0, 0xc42083f180)
        /usr/local/go/src/cmd/vet/types.go:76 +0x370
main.doPackage(0xc420294040, 0xc, 0xc4205db400, 0x27, 0x40, 0x0, 0x0)
        /usr/local/go/src/cmd/vet/main.go:336 +0x999
main.doPackageDir(0xc420294040, 0xc)
        /usr/local/go/src/cmd/vet/main.go:284 +0x606
main.visit(0xc420294040, 0xc, 0x3f34a0, 0xc4208a3a00, 0x0, 0x0, 0x0, 0x0)
        /usr/local/go/src/cmd/vet/main.go:371 +0xf3
path/filepath.walk(0xc420294040, 0xc, 0x3f34a0, 0xc4208a3a00, 0x2f5950, 0x0, 0x0)
        /usr/local/go/src/path/filepath/path.go:351 +0x81
path/filepath.walk(0x7fff5fbff8e0, 0x6, 0x3f34a0, 0xc4200c1ee0, 0x2f5950, 0x0, 0xc4200c1e10)
        /usr/local/go/src/path/filepath/path.go:376 +0x344
path/filepath.Walk(0x7fff5fbff8e0, 0x6, 0x2f5950, 0xc, 0xc4200c1e10)
        /usr/local/go/src/path/filepath/path.go:398 +0xd5
main.walkDir(0x7fff5fbff8e0, 0x6)
        /usr/local/go/src/cmd/vet/main.go:386 +0x41
main.main()
        /usr/local/go/src/cmd/vet/main.go:240 +0x2cb

[minux]

Dup of #15728.