mod=example.com/patherrors
base=none
dir=x
success=false
-- want --
example.com/y/v2: module path must end with "x" or "x/v2", since it is in subdirectory "x"
-- .mod --
module example.com/patherrors
-- .git/HEAD --
-- x/go.mod --
module example.com/y/v2

go 1.12