cp go.mod go.mod.orig

# getting a specific version of a module along with a pattern
# not yet present in that module should report the version mismatch
# rather than a "matched no packages" warning.
! go get example.net/pkgadded@v1.1.0 example.net/pkgadded/subpkg/...
stderr '^go get: conflicting versions for module example\.net/pkgadded: v1\.1\.0 and v1\.2\.0$'
! stderr 'matched no packages'
cmp go.mod.orig go.mod

! go get example.net/pkgadded/...@v1.0.0
stderr '^go get example\.net/pkgadded/\.\.\.@v1\.0\.0: module example\.net/pkgadded@v1\.0\.0 found, but does not contain packages matching example\.net/pkgadded/\.\.\.$'
cmp go.mod.orig go.mod

! go get example.net/pkgadded@v1.0.0 .
stderr -count=1 '^go: found example.net/pkgadded/subpkg in example.net/pkgadded v1\.2\.0$'  # TODO: We shouldn't even try v1.2.0.
stderr '^example.com/m imports\n\texample.net/pkgadded/subpkg: cannot find module providing package example.net/pkgadded/subpkg$'
cmp go.mod.orig go.mod

go get example.net/pkgadded@v1.0.0
! go list -deps -mod=readonly .
stderr '^m.go:3:8: cannot find module providing package example\.net/pkgadded/subpkg: '

-- go.mod --
module example.com/m

go 1.16

require example.net/pkgadded v1.2.0
-- m.go --
package m

import _ "example.net/pkgadded/subpkg"