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

$ go version
go version go1.11.2 darwin/amd64

Does this issue reproduce with the latest release?

This is the latest release today.

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

$ go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/fgm/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/fgm/src/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/Cellar/go/1.11.2/libexec"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.11.2/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/fgm/src/OSInet/net/plusvite/kurz/src/code.osinet.fr/fgm/kurz/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 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/0g/p780bc554njc4qj110_8rmbr0000gn/T/go-build677218822=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

• Store https://play.golang.org/p/7y5rpr2MpL6 as a simple go app in main.go
• run gotext -srclang=en extract -lang=fr,en .

What did you expect to see?

• Nothing on the output
• Directories locales/fr and locales/en created with an out.gotext.json file in each, ideally containing message definitions for NoError and Unimplemented strings.

What did you see instead?

• On the first invocation:
  • errors on the output:

/Users/fgm/src/go/src/golang.org/x/text/internal/number/number.go:150:42: cannot convert t (variable of type golang.org/x/text/language.Tag) to golang.org/x/text/internal/language/compact.Tag
/Users/fgm/src/go/src/golang.org/x/text/feature/plural/plural.go:259:42: cannot convert t (variable of type golang.org/x/text/language.Tag) to golang.org/x/text/internal/language/compact.Tag
gotext: extract failed: : : couldn't load packages due to errors: golang.org/x/text/feature/plural, golang.org/x/text/internal/number

• a locales/en-US directory created with an out.gotext.json file containing only this:

{
    "language": "en-US",
    "messages": null
}

• On subsequent invocations:
  • nothing on the output
  • same locale/en-US directory with the same file in it