Hi sage-devel,
It took me a while yesterday to figure out from where I was obtaining a
Segmentation Fault in some cython code. I was using SIZE=200 thinking it
was ok, but no, it is too large!
I am sharing this so that nobody else loses time on the same problem.
Sébastien
r"""
Segmentation Fault in Cython
EXAMPLES:
Segmentation fault on the machine at work::
sage: test146()
0
0
sage: test147()
/usr/local/sage-5.3/spkg/bin/sage: line 335: 21280 Segmentation fault
sage-ipython "$@" -i
Segmentation fault on my machine (32bit, maybe that's the reason) ::
sage: test127()
0
0
sage: test128()
/Users/slabbe/Applications/bin/sage: line 136: 70473 Segmentation fault
"$SAGE_ROOT/spkg/bin/sage" "$@"
"""
def test127():
DEF SIZE = 127
cdef int C[SIZE][SIZE][SIZE]
c = C[1][2][2]
print c
int(c)
D = {}; D[1] = c
print C[1][2][5]
def test128():
DEF SIZE = 128
cdef int C[SIZE][SIZE][SIZE]
c = C[1][2][2]
print c
int(c)
D = {}; D[1] = c
print C[1][2][5]
def test146():
DEF SIZE = 146
cdef int C[SIZE][SIZE][SIZE]
c = C[1][2][2]
print c
int(c)
D = {}; D[1] = c
print C[1][2][5]
def test147():
DEF SIZE = 147
cdef int C[SIZE][SIZE][SIZE]
c = C[1][2][2]
# any of these lines may cause a segmentation fault
#print c
#int(c)
D = {}; D[1] = c
#print C[1][2][5]
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