does not work with libcap v1.2.72

[shoenig]

libcap v1.2.72 contains a substantial rewrite, and seems to be broken when CGO is in use. The failures below are not from test case assertions, they're caused by the child process created by Go (which is landlock'd) crashing.

https://sites.google.com/site/fullycapable/release-notes-for-libcap#h.ulglddlojmy0

=== RUN   TestLocker_reads
    landlock_linux_test.go:750: TEST[read top dir] (arg: -test.run=TestLocker_reads/read top dir)
                |> failed to read /proc/4152/task - aborting


    landlock_linux_test.go:751:
        landlock_linux_test.go:751: expected nil error
        ↪ error: signal: killed
--- FAIL: TestLocker_reads (0.00s)
=== RUN   TestLocker_writes
    landlock_linux_test.go:750: TEST[none] (arg: -test.run=TestLocker_writes/none)
                |> failed to read /proc/4158/task - aborting


    landlock_linux_test.go:751:
        landlock_linux_test.go:751: expected nil error
        ↪ error: signal: killed
--- FAIL: TestLocker_writes (0.00s)
=== RUN   TestLocker_truncate
    landlock_linux_test.go:750: TEST[truncate_none] (arg: -test.run=TestLocker_truncate/truncate_none)
                |> failed to read /proc/4164/task - aborting


    landlock_linux_test.go:751:
        landlock_linux_test.go:751: expected nil error
        ↪ error: signal: killed
--- FAIL: TestLocker_truncate (0.00s)
=== RUN   TestLocker_creates
    landlock_linux_test.go:750: TEST[none] (arg: -test.run=TestLocker_creates/none)
                |> failed to read /proc/4170/task - aborting


    landlock_linux_test.go:751:
        landlock_linux_test.go:751: expected nil error
        ↪ error: signal: killed
--- FAIL: TestLocker_creates (0.00s)
=== RUN   TestLocker_executes
    landlock_linux_test.go:750: TEST[bash_x] (arg: -test.run=TestLocker_executes/bash_x)
                |> failed to read /proc/4176/task - aborting


    landlock_linux_test.go:751:
        landlock_linux_test.go:751: expected nil error
        ↪ error: signal: killed
--- FAIL: TestLocker_executes (0.01s)
=== RUN   TestLocker_deletes
    landlock_linux_test.go:750: TEST[none] (arg: -test.run=TestLocker_deletes/none)
                |> failed to read /proc/4182/task - aborting


    landlock_linux_test.go:751:
        landlock_linux_test.go:751: expected nil error
        ↪ error: signal: killed
--- FAIL: TestLocker_deletes (0.00s)
=== RUN   TestLocker_symlink
    landlock_linux_test.go:750: TEST[read_escape] (arg: -test.run=TestLocker_symlink/read_escape)
                |> failed to read /proc/4188/task - aborting


    landlock_linux_test.go:751:
        landlock_linux_test.go:751: expected nil error
        ↪ error: signal: killed
--- FAIL: TestLocker_symlink (0.00s)
=== RUN   TestLocker_hardlink
    landlock_linux_test.go:750: TEST[create_escape_link] (arg: -test.run=TestLocker_hardlink/create_escape_link)
                |> failed to read /proc/4194/task - aborting


    landlock_linux_test.go:751:
        landlock_linux_test.go:751: expected nil error
        ↪ error: signal: killed
--- FAIL: TestLocker_hardlink (0.00s)