#715: Parents probably not reclaimed due to too much caching
----------------------------+-----------------------------------------------
Reporter: robertwb | Owner: somebody
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.8
Component: coercion | Keywords: weak cache coercion
Work_issues: fix doctests | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138, #11900
----------------------------+-----------------------------------------------
Comment(by SimonKing):
The segfault in `sage -t devel/sage-main/sage/modular/modsym/space.py`
seems difficult to debug.
Inspecting a core dump with gdb did not help at all:
{{{
(gdb) bt
#0 0x00007f61d12ca097 in kill () from /lib64/libc.so.6
#1 0x00007f61d0044a40 in sigdie () from
/home/simon/SAGE/sage-4.8.alpha3/local/lib/libcsage.so
#2 0x00007f61d0044646 in sage_signal_handler () from
/home/simon/SAGE/sage-4.8.alpha3/local/lib/libcsage.so
#3 <signal handler called>
#4 0x00007f61cf080520 in mpn_submul_1 () from
/home/simon/SAGE/sage-4.8.alpha3/local/lib/libgmp.so.8
#5 0x00007f61cf0b4f0f in __gmpn_sb_bdiv_q () from
/home/simon/SAGE/sage-4.8.alpha3/local/lib/libgmp.so.8
#6 0x00007f61cf0b6428 in __gmpn_divexact () from
/home/simon/SAGE/sage-4.8.alpha3/local/lib/libgmp.so.8
#7 0x00007f61ccbf4d64 in ?? ()
...
#191 0x55c0ade81d9aeecf in ?? ()
#192 0xffffe4b8b6920b7b in ?? ()
#193 0x000000000ac854cf in ?? ()
#194 0x0000000000000000 in ?? ()
}}}
How could one proceed? What other debugging techniques can you recommend?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/715#comment:41>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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