[Libva] vainfo crashes with "Program received signal SIGFPE, Arithmetic exception." Need help to troubleshoot.

[dar8757 at eml.cc]

turning on debug flags

	export CFLAGS="-O0 -ggdb"
	export CXXFLAGS="-O0 -ggdb"

using the following reproducible procedure

	bzr co lp:libvdpau
	git clone git://anongit.freedesktop.org/git/libva
	git clone git://anongit.freedesktop.org/vaapi/vdpau-driver

	cd ./libvdpau
	./autogen.sh
	./configure \
	--libdir=/usr/local/lib64
	make
	make install
	ldconfig

	cd ../libva
	./autogen.sh
	./configure --libdir=/usr/local/lib64 \
	--with-drivers-path=/usr/local/lib64/dri \
	--enable-dummy-driver \
	--enable-glx \
	--enable-egl \
	--disable-wayland
	make
	make install
	ldconfig

	cd ../vdpau-driver
	./autogen.sh
	./configure \
	 --libdir=/usr/local/lib64 \
	 --enable-glx \
	 --enable-tracer \
	 --with-sysroot=/usr/local/${LIBDIR}
	make
	make install
	ldconfig

GDB session returns

	gdb vainfo
		(gdb) run
		Starting program: /usr/local/bin/vainfo 
		[Thread debugging using libthread_db enabled]
		Using host libthread_db library
		"/lib64/libthread_db.so.1".
		libva info: VA-API version 0.33.0
		libva info: va_getDriverName() returns 0
		libva info: Trying to open
		/usr/local/lib64/dri/nvidia_drv_video.so
		libva info: Found init function __vaDriverInit_0_33

		Program received signal SIGFPE, Arithmetic exception.
		0x00007ffff5e4c87c in object_heap_destroy
		(heap=0x619c30) at object_heap.c:275
!!              275         for (i = 0; i < heap->heap_size /
heap->heap_increment; i++) {
		(gdb) bt
		#0  0x00007ffff5e4c87c in object_heap_destroy
		(heap=0x619c30) at object_heap.c:275
		#1  0x00007ffff5e50455 in destroy_heap
		(name=0x7ffff5e5f174 "buffer", heap=0x619c30, 
		    destroy_func=0x7ffff5e50337 <destroy_buffer_cb>,
		    user_data=0x619ae0) at vdpau_driver.c:138
		#2  0x00007ffff5e50488 in vdpau_common_Terminate
		(driver_data=0x619ae0) at vdpau_driver.c:159
		#3  0x00007ffff5e51a75 in vdpau_Terminate_Current
		(ctx=0x612d30) at vdpau_driver_template.h:537
		#4  0x00007ffff5e51b22 in vdpau_Initialize_Current
		(ctx=0x612d30) at vdpau_driver_template.h:563
		#5  0x00007ffff5e51f04 in __vaDriverInit_0_33
		(ctx=0x612d30) at vdpau_driver.c:317
		#6  0x00007ffff7bc494e in va_openDriver (dpy=0x605500,
		driver_name=0x6133c0 "nvidia") at va.c:273
		#7  0x00007ffff7bc543b in vaInitialize (dpy=0x605500,
		major_version=0x7fffffffd96c,
		minor_version=0x7fffffffd968)
		    at va.c:446
		#8  0x000000000040119f in main (argc=1,
		argv=0x7fffffffda88) at vainfo.c:98
		(gdb) 

identifying a problem in object_heap.c


	vi /usr/local/src/vdpau-driver/src/object_heap.c

		...
		261     object_heap_destroy(object_heap_p heap)
		262     {
		263         object_base_p obj;
		264         int bucket_index, obj_index, i;
		265
		266         /* Check if heap is empty */
		267         for (i = 0; i < heap->heap_size; i++) {
		268             /* Check if object is not still
		allocated */
		269             bucket_index = i / heap->heap_increment;
		270             obj_index = i % heap->heap_increment;   
		271             obj =
		(object_base_p)(heap->bucket[bucket_index] + obj_index *
		heap->object_size);
		272             ASSERT(obj->next_free != ALLOCATED);
		273         }
		274
!!!             275         for (i = 0; i < heap->heap_size /
heap->heap_increment; i++) {
		276             free(heap->bucket[i]);
		277         }
		278
		279         pthread_mutex_destroy(&heap->mutex);
		280
		281         free(heap->bucket);
		282         heap->bucket = NULL;
		283         heap->heap_size = 0;
		284         heap->next_free = LAST_FREE;
		285     }

which, i think (?), appeared in

	http://cgit.freedesktop.org/vaapi/intel-driver/commit/?id=ef5efefaec8b3a4eafde2347b98a973f73745421