What version of Go are you using (go version)?

$ go version

go version go1.14.4 linux/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

Deepin 15 [Linux]; AMD 64

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/ibrahim/.cache/go-build"
GOENV="/home/ibrahim/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/ibrahim/go:/home/ibrahim/Repo"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build473479359=/tmp/go-build -gno-record-gcc-switches"

What did you do?

I tried to install a module containing a file containing the following [go install]:

package main

import (
	"fmt"
	pkge "github.com/qeetell-aaaa/aaaaaaab"
)

func main () {
	aome := []byte {1, 2}
	bome := pkge.RemoveLastByte (aome)
	come := pkge.RemoveLastByte (bome)
	dome := pkge.RemoveLastByte (come)
	eome := pkge.RemoveLastByte (dome)
	fome := pkge.RemoveLastByte (eome)
	fmt.Println (aome, bome, come, dome, eome, fome)
}

What did you expect to see?

[1, 2] [1] [] [] [] []

What did you see instead?

# github.com/qeetell-aaaa/aaaaaaab/RemoveLastByte_Test
./test.go:10:30: internal compiler error: 'main': not lowered: v139, Move SSA UNSAFEPTR UNSAFEPTR SSA

Please file a bug report including a short program that triggers the error.
https://golang.org/issue/new