#4961: sage/modules/vector_modn_sparse_c.pxi: allocate_c_vector_modint can leak
memory in case of failure
----------------------+-----------------------------------------------------
Reporter: mabshoff | Owner: craigcitro
Type: defect | Status: new
Priority: major | Milestone: sage-3.3
Component: memleak | Keywords:
----------------------+-----------------------------------------------------
Look at
{{{
cdef int allocate_c_vector_modint(c_vector_modint* v, Py_ssize_t
num_nonzero) except -1:
"""
Allocate memory for a c_vector_modint -- most user code won't call
this.
"""
v.entries = <int*>sage_malloc(num_nonzero*sizeof(int))
if v.entries == NULL:
raise MemoryError, "Error allocating memory"
v.positions = <Py_ssize_t*>sage_malloc(num_nonzero*sizeof(Py_ssize_t))
if v.positions == NULL:
raise MemoryError, "Error allocating memory"
return 0
}}}
When the allocation for positions fails we will leak entries.
Cheers,
Michael
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4961>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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