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Bug#811368: marked as done (Illegal instruction on MIPS)



Your message dated Sun, 3 Apr 2016 00:41:23 +0000
with message-id <20160403004123.GA22523@chase.mapreri.org>
and subject line Re: Bug#811368: Illegal instriction on MIPS
has caused the Debian Bug report #811368,
regarding Illegal instruction on MIPS
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
811368: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=811368
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: python-scipy
Version: 0.16.1-1
Severity: important

On MIPS, scipy stops with an illegal instruction when running the
build time tests for python-astropy , causing an FTBFS there [1].
I could trace this down to the "cephes_igam" function. The Bug is
reproducible by issuing the gammaincinv function:

$ python
Python 2.7.11 (default, Jan 11 2016, 21:04:40) 
[GCC 5.3.1 20160101] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from scipy.special import gammaincinv
>>> gammaincinv(2,0.5)
Illegal instruction (core dumped)

Looking into the core dump, I got

Program terminated with signal SIGILL, Illegal instruction.
#0  0x7424ffd4 in cephes_igam ()
   from /usr/lib/python2.7/dist-packages/scipy/special/_ufuncs.mips-linux-gnu.so
(gdb) where
#0  0x7424ffd4 in cephes_igam ()
   from /usr/lib/python2.7/dist-packages/scipy/special/_ufuncs.mips-linux-gnu.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Best regards

Ole


[1] https://buildd.debian.org/status/fetch.php?pkg=python-astropy&arch=mips&ver=1.1.1-2&stamp=1452829633

--- End Message ---
--- Begin Message ---
On Fri, Mar 18, 2016 at 07:31:36PM +0100, Aurelien Jarno wrote:
> On 2016-03-18 18:15, Ben Hutchings wrote:
> > On Fri, 2016-03-18 at 10:59 +0100, Ole Streicher wrote:
> > > Hi,
> > > 
> > > what is the status of this bug? It is now in "pending" since almost
> > > two
> > > months, but nothing happened since then.
> > > 
> > > This bug causes FTBFS for some important packages on the MIPS buildd,
> > > which therefore cannot migrate to testing.
> > 
> > I think this was fixed by "[mips*] Backport math emulation fix from
> > 4.5." in 3.16.7-ckt25-1 and in 4.3.5-1.
> > 
> > Aurelien, please can you confirm or correct this.
> 
> Yes, this is correct. This will be deployed on the build daemons in the
> next release of jessie.

As expected python-scipy now works correctly on mips and python-astropy
can build again.

Thus, closing the bug (fixed versions already set).


-- 
regards,
                        Mattia Rizzolo

GPG Key: 66AE 2B4A FCCF 3F52 DA18  4D18 4B04 3FCD B944 4540      .''`.
more about me:  http://mapreri.org                              : :'  :
Launchpad user: https://launchpad.net/~mapreri                  `. `'`
Debian QA page: https://qa.debian.org/developer.php?login=mattia  `-

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