[Msys2-users] Debugging undeterministic segfaults

[Gintautas Miliauskas]

Hi David,

more messages means more progress on this issue, so fire away.

Your validate output looks reasonable, some tests are known to fail on
Windows.

I just verified that at least here the build seems to be stable with -j1:
40/40 builds were successful. Great! Now we know that something is up with
multithreaded make.

Thanks for pointing out that virus scanners could be an issue. I found that
Microsoft Security Essentials realtime scanning was on. I'll try disabling
it and see if that helps with the -j5 case.

> So that looks like another successful build. Unless "make" can ignore the
-j argument, I'd say the issue is caused or activated by your configuration.

I would be very happy if that were the case, but there were reports about
instabilities on msys2 from others too. Herbert wrote:

> PS: Fwiw, It seems to me the Cygwin environment seems more reliable
compared to the
>   Msys2 environment. On Cygwin I never had any aborted GHC builds,
>   while on Msys2 it seems to happen from time to time (but
 >  non-deterministic, and rather seldom)

Herbert, were you running make with -jN, N >1?


On Wed, Nov 5, 2014 at 11:36 AM, David Macek <david.macek.0 at gmail.com>
wrote:

> Sorry for the large amount of messages.
>
> On 5. 11. 2014 8:01, David Macek wrote:
> > I'm running validate to double check (detected 4 CPUs).
>
> I got the validate results:
>
> > Unexpected results from:
> > TEST="linker_unload listCommand002 T5681 T5486 T7571 ghcpkg05 T3924
> T7702 plugins01 T6106 ghci038 T8172 ghci032 T5975a T5975b ghci058 T3064
> T3307 environment001 T876 T3738 T4830 T5205 T7436 lazy-bs-alloc T1407
> rdynamic T7037 T5423 T8124 T5435_dyn_asm prog012 prog013 prog001 prog002
> prog003 T4006"
> >
> > OVERALL SUMMARY for test run started at 11/05/14 09:04:01 Central Europe
> Standard Time
> >  1:01:50 spent to go through
> >     4095 total tests, which gave rise to
> >    14911 test cases, of which
> >    11167 were skipped
> >
> >       58 had missing libraries
> >     3578 expected passes
> >       71 expected failures
> >
> >        1 caused framework failures
> >        1 unexpected passes
> >       36 unexpected failures
> >
> > Unexpected passes:
> >    rts  linker_unload (normal)
> >
> > Unexpected failures:
> >    ../../libraries/base/tests     T4006 [bad stdout] (normal)
> >    ../../libraries/base/tests/IO  T3307 [bad exit code] (normal)
> >    ../../libraries/base/tests/IO  environment001 [bad stdout] (normal)
> >    cabal                          ghcpkg05 [bad stderr] (normal)
> >    callarity/perf                 T3924 [stat too good] (normal)
> >    ghci.debugger/scripts          listCommand002 [bad stderr] (ghci)
> >    ghci/linking                   T1407 [bad stderr] (ghci)
> >    ghci/prog001                   prog001 [bad stderr] (ghci)
> >    ghci/prog002                   prog002 [bad stderr] (ghci)
> >    ghci/prog003                   prog003 [bad exit code] (ghci)
> >    ghci/prog012                   prog012 [bad stderr] (ghci)
> >    ghci/prog013                   prog013 [bad stderr] (ghci)
> >    ghci/scripts                   T5975a [bad stderr] (ghci)
> >    ghci/scripts                   T5975b [bad stderr] (ghci)
> >    ghci/scripts                   T6106 [bad stderr] (ghci)
> >    ghci/scripts                   T8172 [bad stdout] (ghci)
> >    ghci/scripts                   ghci032 [bad stderr] (ghci)
> >    ghci/scripts                   ghci038 [bad stderr] (ghci)
> >    ghci/scripts                   ghci058 [bad stderr] (ghci)
> >    llvm/should_compile            T5486 [stderr mismatch] (optllvm)
> >    llvm/should_compile            T5681 [stderr mismatch] (optllvm)
> >    llvm/should_compile            T7571 [stderr mismatch] (optllvm)
> >    perf/compiler                  T3064 [stat not good enough] (normal)
> >    perf/should_run                T3738 [stat too good] (normal)
> >    perf/should_run                T4830 [stat too good] (normal)
> >    perf/should_run                T5205 [stat too good] (normal)
> >    perf/should_run                T7436 [stat too good] (normal)
> >    perf/should_run                T876 [stat not good enough] (normal)
> >    perf/should_run                lazy-bs-alloc [stat not good enough]
> (normal)
> >    plugins                        plugins01 [bad stderr] (normal)
> >    rts                            T5423 [bad stdout] (normal)
> >    rts                            T5435_dyn_asm [bad stdout] (normal)
> >    rts                            T7037 [bad stdout] (normal)
> >    rts                            T8124 [exit code non-0] (threaded1)
> >    rts                            rdynamic [bad exit code] (normal)
> >    simplCore/should_compile       T7702 [stderr mismatch] (normal)
>
> I assume that means the build itself had no errors.
>
> --
> David Macek
> _______________________________________________
> ghc-devs mailing list
> ghc-devs at haskell.org
> http://www.haskell.org/mailman/listinfo/ghc-devs
>



-- 
Gintautas Miliauskas
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