net/url: url.Parse returns an error while parsing 192.168.210.111:8080

[dmigwi]

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

$ go version go1.11.5 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=""
GOCACHE="/home/dmigwi/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/dmigwi/work/app/golang"
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="/home/dmigwi/work/app/golang/src/example/go.mod"
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-build331081696=/tmp/go-build -gno-record-gcc-switches"

What did you do?

While validating a number of urls and some of them returned errors. Here is the sample program.
https://play.golang.org/p/zl8cg1tKkEi

What did you expect to see?

list := []string{"mydomain.herokuapp.com:7777", "192.168.210.111:8080"}

In the above slice both elements were supposed to a fail or be successfully parsed.

What did you see instead?

Parsing the second slice element returned the following error:
parse 192.168.210.111:8080: first path segment in URL cannot contain colon

[dmigwi]

Also referenced here #21415