src/cmd/go/testdata/script/work_issue54048.txt

! go list -m -json all
stderr 'go: module example.com/foo appears multiple times in workspace'

-- go.work --
go 1.18

use (
        ./a
        ./b
)
-- a/go.mod --
module example.com/foo

go 1.18

-- b/go.mod --
module example.com/foo

go 1.18