#7264: segfault while substituting powers of exp
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Reporter: burcin | Owner: burcin
Type: defect | Status: needs_work
Priority: critical | Milestone: sage-4.3
Component: symbolics | Keywords: pynac
Work_issues: | Author: Burcin Erocal
Upstream: N/A | Reviewer:
Merged: |
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Comment(by kcrisman):
This was a fresh build of 4.3.alpha1. Only issue was that I had to hg
-add several files to be able to add patches, and revert the two png files
Minh has mentioned on sage-devel. But I don't see how that would have
affected things.
{{{
sage: exp(x)^I*exp(z)^(2.5)
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0xc23d006b
0x0658315e in GiNaC::Number_T::operator/ ()
(gdb) bt
#0 0x0658315e in GiNaC::Number_T::operator/ ()
#1 0x065837bb in GiNaC::numeric::div ()
#2 0x06549c14 in GiNaC::mul::eval ()
#3 0x06499fa7 in GiNaC::ex::construct_from_basic ()
#4 0x065875f7 in GiNaC::operator* ()
#5 0x0678bbe9 in GiNaC::ptr<GiNaC::basic>::operator= () at
sage/symbolic/expression.cpp:10325
#6 0x0678bbe9 in operator= [inlined] () at ptr.h:75
#7 0x0678bbe9 in __pyx_f_4sage_8symbolic_10expression_10Expression__mul_
(__pyx_v_left=0x103c710, __pyx_v_right=0x103a418, __pyx_skip_dispatch=0)
at sage/symbolic/expression.cpp:10325
#8 0x01a6cc6f in __pyx_pf_4sage_9structure_7element_11RingElement___mul__
(__pyx_v_self=0x103c710, __pyx_v_right=0x103a418) at
sage/structure/element.c:10134
#9 0x00007bc2 in binary_op1 ()
#10 0x0000c109 in PyNumber_Multiply ()
#11 0x000b7833 in PyEval_EvalFrameEx ()
#12 0x000bb71d in PyEval_EvalCodeEx ()
#13 0x000ba07e in PyEval_EvalFrameEx ()
#14 0x000bb71d in PyEval_EvalCodeEx ()
#15 0x000b99c6 in PyEval_EvalFrameEx ()
#16 0x000bb71d in PyEval_EvalCodeEx ()
#17 0x000b99c6 in PyEval_EvalFrameEx ()
#18 0x000ba5c9 in PyEval_EvalFrameEx ()
#19 0x000bb71d in PyEval_EvalCodeEx ()
#20 0x000b99c6 in PyEval_EvalFrameEx ()
#21 0x000bb71d in PyEval_EvalCodeEx ()
#22 0x000b99c6 in PyEval_EvalFrameEx ()
#23 0x000bb71d in PyEval_EvalCodeEx ()
#24 0x000b99c6 in PyEval_EvalFrameEx ()
#25 0x000bb71d in PyEval_EvalCodeEx ()
#26 0x000bb837 in PyEval_EvalCode ()
#27 0x000e0108 in PyRun_FileExFlags ()
#28 0x000e0ff3 in PyRun_SimpleFileExFlags ()
#29 0x000efb7e in Py_Main ()
#30 0x00001c7b in _start ()
#31 0x00001ba9 in start ()
}}}
By the way, I get tons of errors when running sage -gdb "could not find
object file "....o" - no debug information available for "....c" though I
assume that is normal.
The same type of error happens if I just do
{{{
sage: exp(blah)^I*exp(z)
}}}
where blah can be anything. So perhaps something is parsing weird with
the I* business.
Also notice that currently I seem to have both pynac-0.1.10 and
pynac-0.1.10.a0 installed, but fixing this and reinstalling pynac 0.1.10
didn't hep. Interestingly, it has to be two different things in the exps,
as exp(x)^I*exp(x) works fine, but even exp(2)^I*exp(3) doesn't.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7264#comment:7>
Sage <http://www.sagemath.org>
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