Hello Vittorio, I could reproduce it inside a qemu VM (-cpu pentium).
----------- (without debug information) Program received signal SIGILL, Illegal instruction. 0xb6691c34 in ?? () from /usr/lib/i386-linux-gnu/libopencv_imgproc.so.2.4 (gdb) bt #0 0xb6691c34 in ?? () from /usr/lib/i386-linux-gnu/libopencv_imgproc.so.2.4 #1 0xb65f0406 in ?? () from /usr/lib/i386-linux-gnu/libopencv_imgproc.so.2.4 #2 0xb7fed86e in call_init (l=<optimized out>, argc=argc@entry=4, argv=argv@entry=0xbffff764, env=env@entry=0xbffff778) at dl-init.c:78 #3 0xb7fed964 in call_init (env=0xbffff778, argv=0xbffff764, argc=4, l=<optimized out>) at dl-init.c:36 #4 _dl_init (main_map=0xb7fff930, argc=4, argv=0xbffff764, env=0xbffff778) at dl-init.c:126 #5 0xb7fdfd3f in _dl_start_user () from /lib/ld-linux.so.2 (gdb) display /i $pc 1: x/i $pc => 0xb6691c34: cmovle %edi,%edx (gdb) ----------- (with debug information) Program received signal SIGILL, Illegal instruction. 0xb6626ae4 in saturate_cast<short> (v=32768) at /usr/include/opencv2/core/operations.hpp:179 179 v : v > 0 ? SHRT_MAX : SHRT_MIN); (gdb) bt #0 0xb6626ae4 in saturate_cast<short> (v=32768) at /usr/include/opencv2/core/operations.hpp:179 #1 saturate_cast<short> (v=32768) at /usr/include/opencv2/core/operations.hpp:184 #2 cv::initInterTab2D (method=method@entry=1, fixpt=fixpt@entry=false) at /home/benutzer/opencv/opencv-2.4.9.1+dfsg/modules/imgproc/src/imgwarp.cpp:245 #3 0xb65f0406 in initAllInterTab2D () at /home/benutzer/opencv/opencv-2.4.9.1+dfsg/modules/imgproc/src/imgwarp.cpp:290 #4 __static_initialization_and_destruction_0 (__initialize_p=1, __priority=65535) at /home/benutzer/opencv/opencv-2.4.9.1+dfsg/modules/imgproc/src/imgwarp.cpp:298 #5 _GLOBAL__sub_I_imgwarp.cpp(void) () at /home/benutzer/opencv/opencv-2.4.9.1+dfsg/modules/imgproc/src/imgwarp.cpp:4247 #6 0xb7fed86e in call_init (l=<optimized out>, argc=argc@entry=4, argv=argv@entry=0xbffff6f4, env=env@entry=0xbffff708) at dl-init.c:78 #7 0xb7fed964 in call_init (env=0xbffff708, argv=0xbffff6f4, argc=4, l=<optimized out>) at dl-init.c:36 #8 _dl_init (main_map=0xb7fff930, argc=4, argv=0xbffff6f4, env=0xbffff708) at dl-init.c:126 #9 0xb7fdfd3f in _dl_start_user () from /lib/ld-linux.so.2 (gdb) display /i $pc 1: x/i $pc => 0xb6626ae4 <cv::initInterTab2D(int, bool)+1156>: cmovle %edi,%edx (gdb) ----------- Opencv seems to be built optimized for i686 in Jessie. (-march=i686 is given to c++) Attached is a patch similiar to one used for Wheezy to optimize for i486. A Opencv compiled with this patch (-march=i586) does not crash with SIGILL. Kind regards, Bernhard -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
