Re: 177 unexpected test failures on a new system -- is this yet another linker issue?

11 Nov 2016

      ...
A 64-bit archive symbol table sets ar_name to the string “/SYM64/”,
Ok so it seems to be a 64-bit symbol table (according to 
https://docs.oracle.com/cd/E53394_01/html/E54772/ar-3head.html):
padded with 9 blank characters to the right."

We should skip it. I will make a patch.

Thanks for the report!

Sylvain

On 11/11/2016 22:26, Ömer Sinan Ağacan wrote:
...
Sylvain, I tried your patch, here's the output:
cd "./th/T5976.run" &&  "/home/omer/haskell/ghc/inplace/test
spaces/ghc-stage2" -c T5976.hs -dcore-lint -dcmm-lint
-no-user-package-db -rtsopts -fno-warn-missed-specialisations
-fshow-warning-groups -dno-debug-output -XTemplateHaskell -package
template-haskell -fexternal-interpreter -v0
     Actual stderr output differs from expected:
     --- ./th/T5976.run/T5976.stderr.normalised      2016-11-11
16:22:02.247761214 -0500
     +++ ./th/T5976.run/T5976.comp.stderr.normalised 2016-11-11
16:22:02.247761214 -0500
     @@ -1,7 +1,4 @@
     -
     -T5976.hs:1:1:
     -    Exception when trying to run compile-time code:
     -      bar
     -CallStack (from HasCallStack):
     -  error, called at T5976.hs:<line>:<column> in <package-id>:Main
     -    Code: error ((++) "foo " error "bar")
     +ghc-iserv.bin: internal loadArchive: invalid GNU-variant filename
`/SYM64/         ' found while reading
`/home/omer/haskell/ghc/libraries/ghc-prim/dist-install/build/libHSghc-prim-0.5.0.0.a'
     +    (GHC version 8.1.20161107 for x86_64_unknown_linux)
     +    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
     +ghc: ghc-iserv terminated (-6)
     *** unexpected failure for T5976(ext-interp)
Unexpected results from:
     TEST="T5976"
2016-11-11 12:02 GMT-05:00 Ömer Sinan Ağacan :
...
So I just tried validating on another system:
> ghc git:(master) $ uname -a
     Linux linux-enrr.suse 4.1.34-33-default #1 SMP PREEMPT Thu Oct 20 08:03:29
     UTC 2016 (fe18aba) x86_64 x86_64 x86_64 GNU/Linux
> ghc git:(master) $ gcc --version
     gcc (SUSE Linux) 4.8.5
     Copyright (C) 2015 Free Software Foundation, Inc.
     This is free software; see the source for copying conditions.  There is NO
     warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> ghc git:(master) $ ld --version
     GNU ld (GNU Binutils; openSUSE Leap 42.1) 2.26.1
     Copyright (C) 2015 Free Software Foundation, Inc.
     This program is free software; you may redistribute it under the terms of
     the GNU General Public License version 3 or (at your option) a later
     version.
     This program has absolutely no warranty.
It validated without any errors. So I can't reproduce it right now. I'll try
the patch sometime later today when I have the other laptop with me.
Sylvain, do you have any ideas on what difference may be causing this? I'm
pasting gcc and ld versions but I'm not sure if they're relevant at all.
2016-11-11 11:55 GMT-05:00 Sylvain Henry :
...
My bad, in fact we do.
Could you try with the attached patch? It shows the failing filename in the
archive.
On 11/11/2016 17:18, Sylvain Henry wrote:
It seems like we don't bypass the special filename "/" (symbol lookup table)
in rts/Linker.c
https://en.wikipedia.org/wiki/Ar_(Unix)#System_V_.28or_GNU.29_variant
On 11/11/2016 16:49, Ömer Sinan Ağacan wrote:
Ah, sorry, that line was truncated. I posted the output here:
https://gist.githubusercontent.com/osa1/ea72655b8369099e84a67e0949adca7e/raw...
That line should be
+ghc-iserv.bin: internal loadArchive: GNU-variant filename offset not found
while reading filename from
`/home/omer/haskell/ghc/libraries/ghc-prim/dist-install/build/libHSghc-prim-0.5.0.0.a'
+    (GHC version 8.1.20161107 for x86_64_unknown_linux)
+    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
2016-11-11 0:52 GMT-05:00 Reid Barton :
...
On Thu, Nov 10, 2016 at 11:12 PM, Ömer Sinan Ağacan
 wrote:
...
I'm trying to validate on a new system (not sure if related, but it has
gcc
6.2.1 and ld 2.27.0), and I'm having 177 unexpected failures, most
(maybe
even
all) of them are similar to this one:
=====> T5976(ext-interp) 1 of 1 [0, 0, 0]
     cd "./th/T5976.run" &&  "/home/omer/haskell/ghc/inplace/test
spaces/ghc-stage2" -c T5976.hs -dcore-dno-debug-output -XTemplateHaskell
-package template-haskell -fexternal-interpreter -v0
     Actual stderr output differs from expected:
     --- ./th/T5976.run/T5976.stderr.normalised      2016-11-10
23:01:39.351997560 -0500
     +++ ./th/T5976.run/T5976.comp.stderr.normalised 2016-11-10
23:01:39.351997560 -0500
     @@ -1,7 +1,4 @@
     -
     -T5976.hs:1:1:
     -    Exception when trying to run compile-time code:
     -      bar
     -CallStack (from HasCallStack):
     -  error, called at T5976.hs:<line>:<column> in <package-id>:Main
     -    Code: error ((++) "foo " error "bar")
     +ghc-iserv.bin: internal loadArchive: GNU-variant filename offset
not
found while reading filename f
Did this line get truncated? It might help to have the rest of it.
Regards,
Reid Barton
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