net.ParseIP does not parse IP v6 Loopback address

[comradequinn]

$ go version
go version go1.11.2 linux/amd64

Does this issue reproduce with the latest release?

Yes

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

go env Output

$ go env
GOARCH="amd64"
GOBIN="/home/***/workspace/github/go/bin"
GOCACHE="/home/***/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/***/workspace/github/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
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-build736203175=/tmp/go-build -gno-record-gcc-switches"

What did you do?

IP v6 Loopback does not parse using net.ParseIP(string)

https://play.golang.org/p/Buqei8G3zLl

What did you expect to see?

A parsed IP address as a byte slice

What did you see instead?

nil

[comradequinn]

PICNIC - the source port needs removing