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gEDA-bug: Core dump in pcb:M_POLYAREA_intersect()
Hi,
Here is a core-dump that occurs from pcb in M_POLYAREA_intersect(). It
happened while I was making a selection rectangle. In the call to
RectPoly() from r_NoHolesPolygonDicer(), p->xmin >
(p->next->xmin+p->next->xmax)/2 and poly_AndSubtract_free() does not
install a contour in poly2.
Regards,
Rob Jenssen
gdb71 pcb pcb.core
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Reading symbols from /usr/local/bin/pcb...done.
[New Thread 100157]
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Core was generated by `pcb'.
Program terminated with signal 11, Segmentation fault.
#0 0x080d5557 in M_POLYAREA_intersect (e=0xbfbfcd74, afst=0x2a882330,
bfst=0x2a8821b0, add=1) at polygon1.c:814
814 if (a->contours->xmax >= b->contours->xmin &&
(gdb) l 804
799 }
800
801 static void
802 M_POLYAREA_intersect (jmp_buf * e, POLYAREA * afst, POLYAREA * bfst,
int add)
803 {
804 POLYAREA *a = afst, *b = bfst;
805 PLINE *curcA, *curcB;
806 CVCList *the_list = NULL;
807
808 if (a == NULL || b == NULL)
(gdb) 809 error (err_bad_parm);
810 do
811 {
812 do
813 {
814 if (a->contours->xmax >= b->contours->xmin &&
815 a->contours->ymax >= b->contours->ymin &&
816 a->contours->xmin <= b->contours->xmax &&
817 a->contours->ymin <= b->contours->ymax)
818 {
(gdb) p *b
$1 = {f = 0x2a8821b0, b = 0x2a8821b0, contours = 0x0}
(gdb) up
#1 0x080d6d64 in poly_AndSubtract_free (ai=0x2a882330, bi=0x2a8821b0,
aandb=0xbfbfcdd8, aminusb=0xbfbfcdd4) at polygon1.c:1759
1759 M_POLYAREA_intersect (&e, a, b, TRUE);
(gdb) #2 0x080d3a3f in r_NoHolesPolygonDicer (pa=0x2a882330,
emit=0x81072a0 <fill_contour_cb>, user_data=0x2a582de0) at polygon.c:1653
1653 poly_AndSubtract_free (pa, poly2, &left, &right);
(gdb) p *poly2
$2 = {f = 0x2a8821b0, b = 0x2a8821b0, contours = 0x0}
(gdb) l
1648 POLYAREA *poly2, *left, *right;
1649
1650 /* make a rectangle of the left region slicing through the
middle of the first hole */
1651 poly2 = RectPoly (p->xmin, (p->next->xmin + p->next->xmax) / 2,
1652 p->ymin, p->ymax);
1653 poly_AndSubtract_free (pa, poly2, &left, &right);
1654 if (left)
1655 {
1656 POLYAREA *cur, *next;
1657 cur = left;
(gdb) p *p
$3 = {xmin = 188218, ymin = 270428, xmax = 237457, ymax = 322494, next
= 0x2e985520, head = {next = 0x2e99e860, prev = 0x2e99ed40, shared =
0x0, Flags = {status = 0, mark = 0}, cvc_prev = 0x0, cvc_next = 0x0,
point = {188218, 270428}}, Count = 41, area = 2470869742, tree =
0x2a840778, is_round = 0, cx = 0, cy = 0, radius = 0, Flags = {
status = 0, orient = 1}}
(gdb) p *p->next
$4 = {xmin = 161797, ymin = 315250, xmax = 202251, ymax = 322494, next
= 0x2e985580, head = {next = 0x2e99d4a0, prev = 0x2e99db40, shared =
0x0, Flags = {status = 0, mark = 0}, cvc_prev = 0x0, cvc_next = 0x0,
point = {202250, 320000}}, Count = 55, area = 131513049, tree =
0x2a840760, is_round = 0, cx = 0, cy = 0, radius = 0, Flags = {
status = 0, orient = 0}}
(gdb) p (p->next->xmin + p->next->xmax) / 2
$5 = 182024
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