x/tools/gopls: gopls imports not work for module defined in "go.work"

[aj3423]

gopls version

Build info
----------
golang.org/x/tools/gopls v0.8.3
    golang.org/x/tools/[email protected] h1:Mxm94ix8oSARQ6svioO6SxKEYWT/VCP54/448LOHzrk=
    github.com/BurntSushi/[email protected] h1:dtDWrepsVPfW9H/4y7dDgFc2MBUSeJhlaDtK13CxFlU=
    github.com/google/[email protected] h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=
    github.com/sergi/[email protected] h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
    golang.org/x/exp/[email protected] h1:qyrTQ++p1afMkO4DPEeLGq/3oTsdlvdH4vqZUBWzUKM=
    golang.org/x/[email protected] h1:kQgndtyPBW/JIYERgdxfwMYh3AVStj88WQTlNDi2a+o=
    golang.org/x/[email protected] h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
    golang.org/x/[email protected] h1:rm+CHSpPEEW2IsXUib1ThaHIjuBVZjxNgSKmBLFfD4c=
    golang.org/x/[email protected] h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
    golang.org/x/[email protected] h1:rYiuK/jn6TCxjAq1hQ6MR6pgOeP3A5gIHDxgrQ8Vbys=
    golang.org/x/[email protected] h1:9dMzk88fnONra7zrEalqkRMGa9jMGf9B5mdzhYVyI28=
    golang.org/x/[email protected] h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
    honnef.co/go/[email protected] h1:2LdYUZ7CIxnYgskbUZfY7FPggmqnh6shBqfWa8Tn3XU=
    mvdan.cc/[email protected] h1:kTojdZo9AcEYbQYhGuLf/zszYthRdhDNDUi2JKTxas4=
    mvdan.cc/xurls/[email protected] h1:tzxjVAj+wSBmDcF6zBB7/myTy3gX9xvi8Tyr28AuQgc=
go: go1.18.1

go env

GO111MODULE="on"
GOARCH="amd64"
GOBIN="/opt/gobin"
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/root/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/opt/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.18.1"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
GOWORK=""
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-build2241791180=/tmp/go-build -gno-record-gcc-switches"

What did you do?

1. With following directory structure:

├── go.work
├── mod
│   ├── go.mod
│   └── mod.go
└── caller
    ├── go.mod
    └── caller.go

go.work:

go 1.18

use ./mod
use ./caller

mod/go.mod:

module mod

go 1.18

mod/mod.go:

package mod

func Test() {
}

caller/go.mod:

module caller

go 1.18

caller/caller.go:

package main

func main() {
    mod.Test()
    fmt.Println()
}

2. In caller dir, run gopls imports caller.go

What did you expect to see?

Both fmt and mod are imported.

 import (
	"fmt"
	"mod"
)
//...

What did you see instead?

Only fmt is imported, but mod is not.

[jamalc]

Related to #52488.

[gopherbot]

Change https://go.dev/cl/413689 mentions this issue: internal/imports: use a module resolver if GOWORK is set