#11674: np.dot of two numeric matrices segfaults sage.
------------------------------+---------------------------------------------
Reporter: mister.wardrop | Owner: jason, jkantor
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.7.1
Component: numerical | Keywords: ATLAS segfault matrix numpy
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
------------------------------+---------------------------------------------
Comment(by leif):
Unfortunately I do get exactly the same with the new binary distribution
(with ATLAS 3.8.4, built on redhawk):
{{{
----------------------------------------------------------------------
| Sage Version 4.7.1.rc2, Release Date: 2011-08-10 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
**********************************************************************
* *
* Warning: this is a prerelease version, and it may be unstable. *
* *
**********************************************************************
sage: import numpy as np
sage: ms = np.load("/home/leif/Sage/tmp/matrices.npy")
sage: time np.dot(ms[0],ms[1])
/tmp/sage-4.7.1.rc2-fat-x86_64-Linux/local/lib/libcsage.so(print_backtrace+0x31)[0x7f42264ad817]
/tmp/sage-4.7.1.rc2-fat-x86_64-Linux/local/lib/libcsage.so(sigdie+0x14)[0x7f42264ad849]
/tmp/sage-4.7.1.rc2-fat-x86_64-Linux/local/lib/libcsage.so(sage_signal_handler+0x20e)[0x7f42264ad474]
/lib/libpthread.so.0(+0xf8f0)[0x7f422b6538f0]
/tmp/sage-4.7.1.rc2-fat-x86_64-Linux/local/lib/libatlas.so(+0x66bcd)[0x7f42209e2bcd]
------------------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred in Sage.
This probably occurred because a *compiled* component of Sage has a bug
in it and is not properly wrapped with sig_on(), sig_off(). You might
want to run Sage under gdb with 'sage -gdb' to debug this.
Sage will now terminate.
------------------------------------------------------------------------
/tmp/sage-4.7.1.rc2-fat-x86_64-Linux/local/bin/sage-sage: line 301: 26031
Segmentation fault sage-ipython "$@" -i
}}}
(Ubuntu 10.04.3 x86_64, Core2 / Penryn)
{{{
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Core(TM)2 Quad CPU Q9650 @ 3.00GHz
stepping : 10
cpu MHz : 3003.000
cache size : 6144 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx
lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64
monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm
tpr_shadow vnmi flexpriority
bogomips : 7200.05
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
...
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11674#comment:24>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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