Bug#682591: my fault that I let this bugreport incorrectly slip through my fingers -- now it bites on wheezy

[Yaroslav Halchenko]

Hi Sébastien,

thank you for your reply on this issue loong ago, and sorry for staying
silent -- apparently I have emailed from our generic account and never
got the reply delivered back, and then I lost account of this report
until now that I hit it again on a stable wheezy installation.

So here are some details -- better later than never:

neurodebian at lego:~/proj/numpy-vbench$ python -c"import numpy; x = numpy.random.random((1000,1000)); numpy.dot(x, x)"
Illegal instruction

lego:/home/neurodebian/proj/numpy-vbench#  tail /var/log/syslog -n 1
Jul 17 11:05:11 lego kernel: [178687.055328] python[9615] trap invalid opcode ip:7f5b2813ad8d sp:7f5b2498dbb8 error:0 in libblas.so.3.0[7f5b27fcf000+48b000]

neurodebian at lego:~/proj/numpy-vbench$ gdb --args python -c"import numpy; x = numpy.random.random((1000,1000)); numpy.dot(x, x)"
GNU gdb (GDB) 7.4.1-debian
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/python...Reading symbols from /usr/lib/debug/usr/bin/python2.7...done.
done.
(gdb) r
Starting program: /usr/bin/python -cimport\ numpy\;\ x\ =\ numpy.random.random\(\(1000,1000\)\)\;\ numpy.dot\(x,\ x\)
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff2a51700 (LWP 9639)]
[New Thread 0x7ffff2250700 (LWP 9640)]

Program received signal SIGILL, Illegal instruction.
[Switching to Thread 0x7ffff2250700 (LWP 9640)]
0x00007ffff59bad8d in ATL_dJIK48x48x48TN48x48x0_a1_b0 () from /usr/lib/libblas.so.3
(gdb) bt 
#0  0x00007ffff59bad8d in ATL_dJIK48x48x48TN48x48x0_a1_b0 () from /usr/lib/libblas.so.3
#1  0x00007ffff5a2bf87 in ATL_dmmIJK2 () from /usr/lib/libblas.so.3
#2  0x00007ffff5a2cb09 in ATL_dmmIJK () from /usr/lib/libblas.so.3
#3  0x00007ffff59e7c35 in ATL_dgemm () from /usr/lib/libblas.so.3
#4  0x00007ffff5a33fea in ATL_dptgemm0 () from /usr/lib/libblas.so.3
#5  0x00007ffff7bc7b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
#6  0x00007ffff7071a7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()
(gdb) quit
A debugging session is active.

    Inferior 1 [process 9636] will be killed.

Quit anyway? (y or n) y   

neurodebian at lego:~/proj/numpy-vbench$ cat /proc/cpuinfo 
processor   : 0
vendor_id   : AuthenticAMD
cpu family  : 15
model       : 5
model name  : AMD Opteron(tm) Processor 246
stepping    : 8
microcode   : 0x46
cpu MHz     : 1993.638
cache size  : 1024 KB
fpu     : yes
fpu_exception   : yes
cpuid level : 1
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow rep_good nopl
bogomips    : 3987.27
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts ttp

processor   : 1
vendor_id   : AuthenticAMD
cpu family  : 15
model       : 5
model name  : AMD Opteron(tm) Processor 246
stepping    : 8
microcode   : 0x46
cpu MHz     : 1993.638
cache size  : 1024 KB
fpu     : yes
fpu_exception   : yes
cpuid level : 1
wp      : yes
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext lm 3dnowext 3dnow rep_good nopl
bogomips    : 3987.53
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts ttp


-- 
Yaroslav O. Halchenko, Ph.D.
http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org
Senior Research Associate,     Psychological and Brain Sciences Dept.
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834                       Fax: +1 (603) 646-1419
WWW:   http://www.linkedin.com/in/yarik