cvInvert may cause segmentation fault

Hi,

I dont see me so that a patch apply to opencv-2.1.0/src/cxcore/cxlapack.cpp.

cat debian/patches/*.patch | grep +++
+++ b/src/cv/CMakeLists.txt
+++ b/src/cvaux/CMakeLists.txt
+++ b/src/cxcore/CMakeLists.txt
+++ b/src/highgui/CMakeLists.txt
+++ b/src/ml/CMakeLists.txt
+++ b/3rdparty/CMakeLists.txt 2010-04-26 05:49:17.000000000 +0900
+++ b/src/cxcore/CMakeLists.txt 2010-04-26 06:00:09.000000000 +0900
+++ b/CMakeLists.txt 2010-05-17 05:00:23.000000000 +0900
+++ b/doc/CMakeLists.txt
+++ b/src/cxcore/cxsystem.cpp
+++ b/samples/c/build_all.sh
+++ b/include/opencv/cvinternal.h

I am sorry, that comment about the patch to cxlapack.cpp was my mistake. Nevertheless, the bug can be fixed (at least on i386) by building the package with an empty debian/patches/ directory. Since my original guess was wrong, I can only speculate that the problem is related to fix_3rdparty_build.patch. Maybe it is caused by some incompatibility between the lapack in the package and the one from Ubuntu.

bug testcase for i386 from https://code.ros.org/trac/opencv/ticket/656

I can confirm that rebuilding the package without fix_3rdparty_build.patch fixes the bug. Would it be possible to disable this patch for x86 builds?

Florian

Here's the quick-and-dirty workaround (maybe not so quick, the rebuild takes quite some time):

apt-get source opencv
cd opencv-2.1.0
rm debian/patches/fix_3rdparty_build.patch
debuild
cd ..
sudo dpkg -i *.deb

Any news on how to fix this in a release?

Florian

Hi Florian Echtler.
Your workaround not working for me.
Ubuntu 10.10 32bit
Linux wings 2.6.35-23-generic-pae #41-Ubuntu SMP Wed Nov 24 10:35:46 UTC 2010 i686 GNU/Linux

I installed packets:
sudo apt-get install devscripts quilt quilt libraw1394-dev libdc1394-22-dev liblapack-dev python-dev swig texlive-fonts-extra texlive-latex-extra texlive-latex-recommended latex-xcolor texlive-fonts-recommended

Download sources:
apt-get source opencv

Removal patch "fix_3rdparty_build.patch" leads to an error, so I replaced it with an empty file.

debuild configured - OK.(attached)

debuild make output error:

Building CXX object src/cxcore/CMakeFiles/cxcore_pch_dephelp.dir/cxcore_pch_dephelp.o
cd /home/dis/opencv-2.1.0/obj-i686-linux-gnu/src/cxcore && /usr/bin/c++ -DHAVE_IPP -DHAVE_CONFIG_H -DCVAPI_EXPORTS -g -O2 -Wall -pthread -march=i686 -ffunction-sections -O3 -DNDEBUG -fomit-frame-pointer -ffast-math -mfpmath=387 -DNDEBUG -I/usr/lib/python2.6/dist-packages/numpy/core/include -I/usr/lib/../include -I/home/dis/opencv-2.1.0/. -I/home/dis/opencv-2.1.0/obj-i686-linux-gnu -I/home/dis/opencv-2.1.0/include -I/home/dis/opencv-2.1.0/include/opencv -I/home/dis/opencv-2.1.0/src/cxcore/../../3rdparty/include -I/home/dis/opencv-2.1.0/src/cxcore/../../include/opencv -I/home/dis/opencv-2.1.0/obj-i686-linux-gnu/src/cxcore -D PYTHON_USE_NUMPY=1 -o CMakeFiles/cxcore_pch_dephelp.dir/cxcore_pch_dephelp.o -c /home/dis/opencv-2.1.0/obj-i686-linux-gnu/src/cxcore/cxcore_pch_dephelp.cxx
In file included from /home/dis/opencv-2.1.0/src/cxcore/_cxcore.h:63,
                 from /home/dis/opencv-2.1.0/obj-i686-linux-gnu/src/cxcore/cxcore_pch_dephelp.cxx:1:
/home/dis/opencv-2.1.0/include/opencv/cvinternal.h:99: fatal error: ipp.h: File not found.

How do you solved this problem?

Hm, I forgot to add a line about editing debian/patches/series and removing the fix_3rdparty_build.patch - but apart from that, it works on my machine. Do you have installed anything relating to IPP (Intel Performance Primitives)? Maybe that's causing your error...

Florian

Status changed to 'Confirmed' because the bug affects multiple users.