#12266: 3^3^3^3 segfaults
-------------------------+--------------------------------------------------
Reporter: vbraun | Owner: jason, jkantor
Type: defect | Status: new
Priority: major | Milestone: sage-5.0
Component: numerical | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
-------------------------+--------------------------------------------------
As reported on http://ask.sagemath.org/question/1031/segmentation-fault-
when-evaluating-3333:
{{{
sage: 3^3^3^3
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
/home/vbraun/<ipython console> in <module>()
/home/vbraun/opt/sage-4.8.alpha6/local/lib/python2.6/site-
packages/sage/rings/integer.so in sage.rings.integer.Integer.__pow__
(sage/rings/integer.c:12867)()
RuntimeError: Segmentation fault
}}}
Debugger shows that we call `gmp_n_pow_ui` on a non-int:
{{{
(gdb) bt
#0 0x00007fffed883c14 in __gmp_tmp_reentrant_alloc ()
from /home/vbraun/opt/sage-4.8.alpha6/local/lib/libgmp.so.8
#1 0x00007fffed897754 in __gmpz_n_pow_ui ()
from /home/vbraun/opt/sage-4.8.alpha6/local/lib/libgmp.so.8
#2 0x00007fffe75fbce7 in
__pyx_pf_4sage_5rings_7integer_7Integer_36__pow__ (__pyx_v_self=0x3e8fe70,
__pyx_v_n=0x3e8fbd0, __pyx_v_modulus=<optimized out>) at
sage/rings/integer.c:12881
#3 0x00007ffff7c85fe2 in ternary_op (v=0x3e8fe70, w=0x3e8fbd0,
z=0x7ffff7fc92a0, op_slot=48, op_name=Unhandled dwarf expression opcode
0xfa
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12266>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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