Robert Vollmert <rob@vllmrt.net> writes:

>> On 16. Jul 2019, at 18:28, Marius Bakke <mbakke@fastmail.com> wrote:
>> 
>> Robert Vollmert <rob@vllmrt.net> writes:
>> 
>>> I was able to run both tests from the build directory in /tmp,
>>> and they both passed fine. Also they both involve user ids, I
>>> suspect those might differ in the build container?
>>> 
>>> main = do
>>>    void $ forkIO $ forever $ getGroupEntryForID 0
>>>    void $ forkIO $ forever $ getGroupEntryForID 0
>>>    threadDelay (3*1000*1000)
>>> 
>>> main = do
>>>    root <- getUserEntryForName "root"
>>>    putStrLn (ue2String root)
>>>    root' <- getUserEntryForID (userID root)
>>>    putStrLn (ue2String root')
>>>    if homeDirectory root == homeDirectory root' &&
>>>       userShell     root == userShell     root'
>>>        then putStrLn "OK"
>>>        else putStrLn “Mismatch"
>> 
>> The only reliable user ID available in the build container is 'nobody'
>> with UID and GID 65534 and the (see nix/libstore/build.cc:1862).
>> 
>> You can likely patch these tests to refer to that instead.
>
> Thanks, I’ll give that a shot!
>
>
> There’s something I don’t understand: Comments above the definition
> of ghc-7 mention test failures, particularly one of these (posix010):
>
> ;; - Test posix010 tries to check the existence of a user on the system:
> ;;   getUserEntryForName: does not exist (no such user)
>
> But I don’t see any place in the definitions of any of the GHC packages
> (ghc-7, ghc-8.0, ghc-8.4) that patch any tests out, and tests aren’t
> disabled either. So how can these packages apparently be fine?

It looks like failing tests don't cause these builds to fail for some
reason.

Here is an excerpt from the GHC 7 build log on 'core-updates' [0]:

Unexpected results from:
TEST="T8108 process002 process001 posix010 exec_signals T9203 T9961 parsing001 haddock.base"

OVERALL SUMMARY for test run started at Wed Jul 10 09:03:57 2019 UTC
 0:59:45 spent to go through
    4434 total tests, which gave rise to
   17996 test cases, of which
   13907 were skipped

      49 had missing libraries
    3989 expected passes
      42 expected failures

       1 caused framework failures
       0 unexpected passes
       5 unexpected failures
       4 unexpected stat failures

Unexpected failures:
   ../../libraries/process/tests        process001 [bad exit code] (normal)
   ../../libraries/process/tests        process002 [bad exit code] (normal)
   ../../libraries/unix/tests           T8108 [bad stderr] (normal)
   ../../libraries/unix/tests/libposix  posix010 [bad exit code] (normal)
   rts                                  exec_signals [bad exit code] (normal)

Unexpected stat failures:
   perf/compiler    T9961 [stat not good enough] (normal)
   perf/compiler    parsing001 [stat too good] (normal)
   perf/haddock     haddock.base [stat too good] (normal)
   perf/should_run  T9203 [stat too good] (normal)

make[2]: Leaving directory '/tmp/guix-build-ghc-7.10.2.drv-0/ghc-7.10.2/testsuite/tests'
make[1]: Leaving directory '/tmp/guix-build-ghc-7.10.2.drv-0/ghc-7.10.2/testsuite/tests'
phase `check' succeeded after 3588.0 seconds

[0]: https://ci.guix.gnu.org/log/42f20g43jaxs27jd407wn6fad9cpwjf7-ghc-7.10.2