test-round fails on alpha

test-round fails on alpha

[Marijn Schouten (hkBst)]

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Hi list,

guile-1.8.6's test-round fails on alpha:


make[4]: Entering directory
`/var/tmp/portage/dev-scheme/guile-1.8.5-r1/work/guile-1.8.5/test-suite/standalone'
PASS: test-system-cmds
PASS: test-require-extension
PASS: test-bad-identifiers
PASS: test-num2integral
test-round: test-round.c:98: test_scm_c_round: Assertion `x == floor (x)'
failed.
/bin/sh: line 4: 19071 Aborted                 "../../pre-inst-guile-env"
${dir}$tst
FAIL: test-round
PASS: test-gh
PASS: test-asmobs
PASS: test-list
PASS: test-unwind
PASS: test-conversion
PASS: test-use-srfi
PASS: test-with-guile-module


Marijn

- --
Marijn Schouten (hkBst), Gentoo Lisp project, Gentoo ML
<http://www.gentoo.org/proj/en/lisp/>, #gentoo-{lisp,ml} on FreeNode
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Re: test-round fails on alpha

[Ludovic Courtès]

Hi,

"Marijn Schouten (hkBst)" <hkBst@gentoo.org> writes:

> guile-1.8.6's test-round fails on alpha:
>
>
> make[4]: Entering directory
> `/var/tmp/portage/dev-scheme/guile-1.8.5-r1/work/guile-1.8.5/test-suite/standalone'

This is actually 1.8.5.  :-)

> test-round: test-round.c:98: test_scm_c_round: Assertion `x == floor (x)'
> failed.
> /bin/sh: line 4: 19071 Aborted                 "../../pre-inst-guile-env"

I can't reproduce it on a GNU/Linux Alpha box:

  http://autobuild.josefsson.org/guile/#guile-alphaev56-unknown-linux-gnu

That said, Debian once hit this problem too:

  http://www.nabble.com/Re%3A-Summer-holidays-tt18648822.html#a18922155

I don't know how it was solved, though.  Neil?

Thanks,
Ludo'.

Re: test-round fails on alpha

[Marijn Schouten (hkBst)]

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Ludovic � wrote:
> Hi,
> 
> "Marijn Schouten (hkBst)" <hkBst@gentoo.org> writes:
> 
>> guile-1.8.6's test-round fails on alpha:
>>
>>
>> make[4]: Entering directory
>> `/var/tmp/portage/dev-scheme/guile-1.8.5-r1/work/guile-1.8.5/test-suite/standalone'
> 
> This is actually 1.8.5.  :-)

Indeed it is. Sorry. I didn't have access to the actual 1.8.6 output, but it
fails in the same way:


make  check-TESTS
make[4]: Entering directory
`/var/tmp/portage/dev-scheme/guile-1.8.6/work/guile-1.8.6/test-suite/standalone'
PASS: test-system-cmds
PASS: test-require-extension
PASS: test-bad-identifiers
PASS: test-num2integral
test-round: test-round.c:98: test_scm_c_round: Assertion `x == floor (x)'
failed.
/bin/sh: line 4: 21303 Aborted                 "../../pre-inst-guile-env"
${dir}$tst
FAIL: test-round
PASS: test-gh
PASS: test-asmobs
PASS: test-list
PASS: test-unwind
PASS: test-conversion
PASS: test-use-srfi
PASS: test-scm-c-read
PASS: test-with-guile-module
PASS: test-scm-with-guile
==================================
1 of 14 tests failed


>> test-round: test-round.c:98: test_scm_c_round: Assertion `x == floor (x)'
>> failed.
>> /bin/sh: line 4: 19071 Aborted                 "../../pre-inst-guile-env"
> 
> I can't reproduce it on a GNU/Linux Alpha box:
> 
>   http://autobuild.josefsson.org/guile/#guile-alphaev56-unknown-linux-gnu

the alpha that this fails on is apparently "EV68AL with alpha-unknown-linux-gnu"

Marijn


- --
Marijn Schouten (hkBst), Gentoo Lisp project, Gentoo ML
<http://www.gentoo.org/proj/en/lisp/>, #gentoo-{lisp,ml} on FreeNode
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Re: test-round fails on alpha

[Ludovic Courtès]

Hi,

"Marijn Schouten (hkBst)" <hkBst@gentoo.org> writes:

>> I can't reproduce it on a GNU/Linux Alpha box:
>> 
>>   http://autobuild.josefsson.org/guile/#guile-alphaev56-unknown-linux-gnu
>
> the alpha that this fails on is apparently "EV68AL with alpha-unknown-linux-gnu"

According to http://en.wikipedia.org/wiki/DEC_Alpha, it's a more recent
model than EV56, but I don't know how it differs.  Unfortunately, I
don't have access to such a machine so I can't really help.

Anyway, I think experience from Debian (Rob & Neil) on that matter could
be helpful.

Thanks,
Ludo'.

Re: test-round fails on alpha

[Neil Jerram]

ludo@gnu.org (Ludovic Courtès) writes:

> Anyway, I think experience from Debian (Rob & Neil) on that matter could
> be helpful.

It was being seen on m68k, and apparently that is not a
release-critical architecture for Lenny (the next Debian release), so
I stopped looking at it.

I've appended relevant history below, but basically this still needs
investigation.

       Neil


Me:
> For the rest...  There is a remaining bug in test-round in m68k:
> 
> lt-test-round: test-round.c:86: test_scm_c_round: Assertion
> `scm_c_round (x) == want' failed.
> 
> Will that prevent the upload from reaching testing?  If so, I'll look
> into a fix.

Me again:
> It seems to be a fairly obscure rounding test that is failing:
> 
>      x = ldexp (1.0, DBL_MANT_DIG - 1) - 1.0 + 0.5;
>      want = ldexp (1.0, DBL_MANT_DIG - 1);
>      assert (scm_c_round (x) == want);
> 
> i.e., IIUC, testing rounding near the upper limit of what can be
> represented as a floating point number.
> 
> Looking at this from the "what changed" point of view: I don't believe
> that either the code (scm_c_round() in libguile/numbers.c) or the test
> (test-suite/standalone/test-round.c) has changed significantly since
> 2004.  As far as Debian is concerned, therefore, I would have expected
> to see exactly the same m68k build failure for 1.8.1+1-4 (the current
> stable version) and 1.8.4+1.2 (current testing).  But I haven't been
> able to find any build logs to confirm or deny that.

Rob:
> Note that if I recall correctly, m68k isn't a release critical
> architecture for lenny, so although I think it would be good to fix
> this, it may not affect guile's inclusion in lenny.

Me:
> Excellent, sounds like we're all set then.

Re: test-round fails on alpha

[Ludovic Courtès]

Hello!

Marijn, assuming you have access to the EV68, do you feel like debugging
this further?  :-)

Thanks,
Ludo'.

Re: test-round fails on alpha

[Marijn Schouten (hkBst)]

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Ludovic � wrote:
> Hello!
> 
> Marijn, assuming you have access to the EV68, do you feel like debugging
> this further?  :-)
> 
> Thanks,
> Ludo'.
>

I can get access to that machine. If you have some ideas that you would like me
to try I could do that. Otherwise I don't know when I'll look into it.

Marijn

- --
Marijn Schouten (hkBst), Gentoo Lisp project, Gentoo ML
<http://www.gentoo.org/proj/en/lisp/>, #gentoo-{lisp,ml} on FreeNode
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Re: test-round fails on alpha

[Marijn Schouten (hkBst)]

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Marijn Schouten (hkBst) wrote:
> Ludovic ý wrote:
>> Hello!
> 
>> Marijn, assuming you have access to the EV68, do you feel like debugging
>> this further?  :-)
> 
>> Thanks,
>> Ludo'.
> 
> 
> I can get access to that machine. If you have some ideas that you would like me
> to try I could do that. Otherwise I don't know when I'll look into it.
> 
> Marijn

Hi,

it seems this is a glibc issue:
http://bugs.gentoo.org/show_bug.cgi?id=245701#c18

so not a guile bug :)

Marijn

- --
Gods do not want you to think, lest they lose existence.
Religions do not want you to think, lest they lose power.

Marijn Schouten (hkBst), Gentoo Lisp project, Gentoo ML
<http://www.gentoo.org/proj/en/lisp/>, #gentoo-{lisp,ml} on FreeNode
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Re: test-round fails on alpha

[Neil Jerram]

"Marijn Schouten (hkBst)" <hkBst@gentoo.org> writes:

> it seems this is a glibc issue:
> http://bugs.gentoo.org/show_bug.cgi?id=245701#c18
>
> so not a guile bug :)

Thanks for discovering this and letting us know!

     Neil