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

golang.org/x/tools/gopls v0.1.3
    golang.org/x/tools/gopls@v0.1.4-0.20190806194950-6743d4095d4b h1:2RQrzcrEYVmfqqLlivm/WQAKgrN3esjyGgkI4UhN/a0=
    golang.org/x/sync@v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
    golang.org/x/tools@v0.0.0-20190723021737-8bb11ff117ca h1:SqwJrz6xPBlCUltcEHz2/p01HRPR+VGD+aYLikk8uas=

Go info
-------
go version go1.12.7 darwin/amd64

GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/chines209/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/chines209/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
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 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/zs/qv8flyxx1zl_nmdkklb5p15sz6zd1t/T/go-build867357531=/tmp/go-build -gno-record-gcc-switches -fno-common"

Does this issue reproduce with the latest release?

Yes.

What did you do?

I declared a function type struct field. The function has a parameter and return value with a type that is an exported alias of a type in an internal package my code doesn't have access to. For example:

import "golang.org/x/net/ipv4"

type mockAppender struct {
	appendMessages func(now time.Time, ms []ipv4.Message) ([]ipv4.Message, bool)
	stopped        func()
}

I then declare type literals for mockAppender in VSCode with the gopls.usePlaceholders option enabled.

What did you expect to see?

When I type a struct literal for the above type and add the appendMessages field, I expect the generated placeholder to reference types my code has access to, specifically:

ma := mockAppender{
	appendMessages: // placeholder -> func(now time.Time, ms []ipv4.Message) ([]ipv4.Message, bool, StepTime),
}

What did you see instead?

A placeholder that referenced types from a package my code cannot import that is type that ipv4.Message aliases. Specifically:

ma := mockAppender{
	appendMessages: // placeholder -> func(now time.Time, ms []socket.Message) ([]socket.Message, bool, StepTime),
}