#10548: The coercion model is keeping references to tracebacks which causes
memory
leaks.
-------------------------------+--------------------------------------------
Reporter: mderickx | Owner: robertwb
Type: defect | Status: positive_review
Priority: major | Milestone: sage-4.7
Component: coercion | Keywords:
Author: Robert Bradshaw | Upstream: N/A
Reviewer: Maarten Derickx | Merged:
Work_issues: |
-------------------------------+--------------------------------------------
Description changed by jdemeyer:
Old description:
> When I was doing some computations on modular forms, I noticed that the
> ModularSymbols_clear_cache() was not doing what it claims to do.
>
> {{{
> sage: import gc
> sage: m=ModularSymbols(Gamma1(29),sign=1)
> sage: m=[]
> sage: ModularSymbols_clear_cache()
> sage: gc.collect()
> 57
> sage: [x for x in gc.get_objects() if
> isinstance(x,sage.modular.modsym.ambient.ModularSymbolsAmbient_wtk_g1)]
> [Modular Symbols space of dimension 49 for Gamma_1(29) of weight 2 with
> sign 1 and over Rational Field]
> sage:
> }}}
> So even after garbage collection the modular symbols element is still in
> memory.
>
> When testing please also make sure that the last stackframe from #10570
> is also gone.
>
> Apply 10548-coerce-traceback.2.patch, trac_10548-coerce-traceback-
> doctest.v2.patch
New description:
When I was doing some computations on modular forms, I noticed that the
ModularSymbols_clear_cache() was not doing what it claims to do.
{{{
sage: import gc
sage: m=ModularSymbols(Gamma1(29),sign=1)
sage: m=[]
sage: ModularSymbols_clear_cache()
sage: gc.collect()
57
sage: [x for x in gc.get_objects() if
isinstance(x,sage.modular.modsym.ambient.ModularSymbolsAmbient_wtk_g1)]
[Modular Symbols space of dimension 49 for Gamma_1(29) of weight 2 with
sign 1 and over Rational Field]
sage:
}}}
So even after garbage collection the modular symbols element is still in
memory.
When testing please also make sure that the last stackframe from #10570 is
also gone.
Apply [attachment:10548-coerce-traceback.2.patch] and
[attachment:trac_10548-coerce-traceback-doctest.v2.patch]
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10548#comment:21>
Sage <http://www.sagemath.org>
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