#9129: sqrt memory leaks
--------------------------------+-------------------------------------------
Reporter: zimmerma | Owner: AlexGhitza
Type: defect | Status: new
Priority: critical | Milestone: sage-4.5
Component: basic arithmetic | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
--------------------------------+-------------------------------------------
Comment(by zimmerma):
with the following code in Sage 4.4.4:
{{{
for i in range(10^4):
a=Mod(2^32+1,3).sqrt()
}}}
valgrind says:
{{{
==6861== 5,312,296 bytes in 9,911 blocks are possibly lost in loss record
6,212\
of 6,212
==6861== at 0x4A0515D: malloc (vg_replace_malloc.c:195)
==6861== by 0x4D1E1B8: _PyObject_GC_Malloc (gcmodule.c:1351)
==6861== by 0x4D1E2AD: _PyObject_GC_NewVar (gcmodule.c:1383)
==6861== by 0x4C78F80: PyFrame_New (frameobject.c:642)
==6861== by 0x4CF0324: PyEval_EvalCodeEx (ceval.c:2755)
==6861== by 0x4C7997A: function_call (funcobject.c:524)
==6861== by 0x4C4EA72: PyObject_Call (abstract.c:2492)
==6861== by 0x4C5F0DE: instancemethod_call (classobject.c:2579)
==6861== by 0x4C4EA72: PyObject_Call (abstract.c:2492)
==6861== by 0x4CE9022: PyEval_CallObjectWithKeywords (ceval.c:3575)
==6861== by 0x1E356FA6:
__pyx_pf_4sage_9structure_7factory_13UniqueFactory__\
_call__ (factory.c:877)
==6861== by 0x4C4EA72: PyObject_Call (abstract.c:2492)
==6861== by 0x4CAD893: slot_tp_call (typeobject.c:5378)
==6861== by 0x4C4EA72: PyObject_Call (abstract.c:2492)
==6861== by 0x1BCC2AC6:
__pyx_pf_4sage_5rings_12finite_rings_11integer_mod_1\
9IntegerMod_abstract_sqrt (integer_mod.c:6959)
==6861== by 0x4C4EA72: PyObject_Call (abstract.c:2492)
==6861== by 0x4CE9022: PyEval_CallObjectWithKeywords (ceval.c:3575)
==6861== by 0x4C6926B: methoddescr_call (descrobject.c:246)
==6861== by 0x4C4EA72: PyObject_Call (abstract.c:2492)
==6861== by 0x4CE9022: PyEval_CallObjectWithKeywords (ceval.c:3575)
==6861== by 0x1BCA21A8:
__pyx_pf_4sage_5rings_12finite_rings_11integer_mod_1\
4IntegerMod_int_sqrt (integer_mod.c:18128)
==6861== by 0x4CEEEDE: PyEval_EvalFrameEx (ceval.c:3706)
==6861== by 0x4CF0B44: PyEval_EvalCodeEx (ceval.c:2968)
==6861== by 0x4CF0C11: PyEval_EvalCode (ceval.c:522)
==6861== by 0x4CF0287: PyEval_EvalFrameEx (ceval.c:4401)
}}}
Does it say something to somebody fluent in Pyrex?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9129#comment:5>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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