Hi, 

sage-5.8, install from source on Ubuntu10.04 LT.
the SIGSEGV has been reproduced on a Scientifuc Linux node as well.

Unfortunately I cannot not isolate it. It occurs in the middle of
the run after doing similar things a thousand times before.
Probably caused in one of the libraries used for treatment of symbolic
expressions at least thats where it always stops, in gmul or in subs. 

I run it with -gbd. The backtrace is the only thing I can show you (see below)
for now. The code is rather large. 
The last line of my code is 
865            varfu=((f1-f)**_sage_const_2 
+(f2-f)**_sage_const_2)**_sage_const_0p5 *avrho
... some multiplication of symbolic functions f1,f,avrho
In this example it sage crashes stops at trying gsub.  

I dont know how to get a Valgrind report .Always when the Segfault appears SAGE 
switches to the gdb report. 

How to proceed ? 

I really need to get rid of this, else I will lose
a lot of more time - I think of eliminating all symbolic expressions in my code
to avoid usage of sage libraries.

ciao & thanks

Here is the crash report: 

########################
GNU gdb (GDB) 7.5.1
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
0x00007f7f493bf44e in waitpid () from /lib/libpthread.so.0

Stack backtrace
---------------
No symbol table info available.
#1  0x00007f7f4673ac63 in print_enhanced_backtrace () from 
/home/frichter/sage-5.8/local/lib/libcsage.so
No symbol table info available.
#2  0x00007f7f4673ace9 in sigdie () from 
/home/frichter/sage-5.8/local/lib/libcsage.so
No symbol table info available.
#3  0x00007f7f4673a49f in sage_signal_handler () from 
/home/frichter/sage-5.8/local/lib/libcsage.so
No symbol table info available.
#4  <signal handler called>
No symbol table info available.
#5  0x00007f7f24d6a8ea in GiNaC::basic::tinfo() const () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#6  0x00007f7f24ea0ef1 in GiNaC::power::compare(GiNaC::basic const&) const () 
from /home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#7  0x00007f7f24d6ad1b in GiNaC::ex::compare(GiNaC::ex const&) const () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#8  0x00007f7f24dbd993 in GiNaC::expair_rest_is_less::operator()(GiNaC::expair 
const&, GiNaC::expair const&) const () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#9  0x00007f7f24dc0981 in void 
std::__unguarded_linear_insert<__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, GiNaC::expair, 
GiNaC::expair_rest_is_less>(__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, GiNaC::expair, 
GiNaC::expair_rest_is_less) () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#10 0x00007f7f24dbfe84 in void 
std::__unguarded_insertion_sort<__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
GiNaC::expair_rest_is_less>(__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
__gnu_cxx::__normal_iterator<GiNaC::expair*, std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > >, GiNaC::expair_rest_is_less) ()
   from /home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#11 0x00007f7f24dbf4e2 in void 
std::__final_insertion_sort<__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
GiNaC::expair_rest_is_less>(__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
__gnu_cxx::__normal_iterator<GiNaC::expair*, std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > >, GiNaC::expair_rest_is_less) ()
   from /home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#12 0x00007f7f24dbec07 in void 
std::sort<__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
GiNaC::expair_rest_is_less>(__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
__gnu_cxx::__normal_iterator<GiNaC::expair*, std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > >, GiNaC::expair_rest_is_less) ()
   from /home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#13 0x00007f7f24dbb9ab in GiNaC::expairseq::canonicalize() () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#14 0x00007f7f24dbad2a in 
GiNaC::expairseq::construct_from_epvector(std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > const&, bool) () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#15 0x00007f7f24d66076 in 
GiNaC::add::add(std::auto_ptr<std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > >, GiNaC::ex const&) () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#16 0x00007f7f24e5a7b3 in GiNaC::mul::eval(int) const () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#17 0x00007f7f24db4648 in GiNaC::ex::construct_from_basic(GiNaC::basic const&) 
() from /home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#18 0x00007f7f24d6acb7 in GiNaC::ex::ex(GiNaC::basic const&) () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#19 0x00007f7f24e943cb in GiNaC::exminus(GiNaC::ex const&) () from 
/home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#20 0x00007f7f24e9445b in GiNaC::operator-(GiNaC::ex const&, GiNaC::ex const&) 
() from /home/frichter/sage-5.8/local/lib/libpynac.so.4
No symbol table info available.
#21 0x00007f7f24a0c9f9 in 
__pyx_f_4sage_8symbolic_10expression_10Expression__sub_ 
(__pyx_v_left=0x9765b90, __pyx_v_right=0x9765c68, 
__pyx_skip_dispatch=<optimized out>) at sage/symbolic/expression.cpp:13858
        __pyx_t_8 = {bp = {p = 0x312e8c0}}
        __pyx_r = <optimized out>
        __pyx_t_1 = 0x7f7f25155580 <typeinfo for GiNaC::basic>
        __pyx_t_5 = <optimized out>
        __pyx_t_9 = {bp = {p = 0x312e8c0}}
        __pyx_lineno = <optimized out>
        __pyx_v_x = {bp = {p = 0x312e8c0}}
        __pyx_v__right = 0x9765c68
        __pyx_v_op = <optimized out>
        __pyx_t_2 = 0x10
        __pyx_t_6 = {bp = {p = 0x312e8c0}}
        __pyx_t_7 = {bp = {p = 0x312e8c0}}
        __pyx_clineno = <optimized out>
#22 0x00007f7f3f138154 in 
__pyx_pf_4sage_9structure_7element_11RingElement_4__sub__ 
(__pyx_v_right=<optimized out>, __pyx_v_left=<optimized out>) at 
sage/structure/element.c:13806
        __pyx_clineno = <optimized out>
        __pyx_v_n = <optimized out>
        __pyx_t_1 = <optimized out>
        __pyx_lineno = <optimized out>
#23 __pyx_pw_4sage_9structure_7element_11RingElement_5__sub__ 
(__pyx_v_left=0x9765b90, __pyx_v_right=0x9765c68) at 
sage/structure/element.c:13736
        __pyx_r = <optimized out>
#24 0x00007f7f4961742a in binary_op1 (v=0x9765b90, w=0x9765c68, op_slot=8) at 
Objects/abstract.c:945
        x = <optimized out>
        slotv = 0x7f7f3f138060 
<__pyx_pw_4sage_9structure_7element_11RingElement_5__sub__>
        slotw = 0x0
#25 0x00007f7f4961aabe in binary_op (op_name=<optimized out>, 
op_slot=<optimized out>, w=<optimized out>, v=<optimized out>) at 
Objects/abstract.c:997
        result = <optimized out>
#26 PyNumber_Subtract (v=0x200000000, w=0x200000000) at Objects/abstract.c:1178
No locals.
#27 0x00007f7f496c32f1 in PyEval_EvalFrameEx (f=0x97e6ca0, throwflag=<optimized 
out>) at Python/ceval.c:1366
        stack_pointer = <optimized out>
        next_instr = 0x22298d6 "t&"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = 0x9765c68
        v = 0x9765b90
        w = <optimized out>
        u = 0x7fff76fa5740
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x97e7038
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f48900230
        instr_ub = 1933
        instr_lb = 1899
        instr_prev = 1905
        first_instr = 0x2229164 "\207\001"
        names = 0x2223390
        consts = 0x7f7f49a72e20
#28 0x00007f7f496c9578 in PyEval_EvalCodeEx (co=0x7f7f48900230, 
globals=<optimized out>, locals=<optimized out>, args=0xa, argcount=<optimized 
out>, kws=<optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/ceval.c:3253
        f = 0x97e6ca0
        retval = <optimized out>
        freevars = <optimized out>
        tstate = 0x19c70c0
        x = <optimized out>
        u = <optimized out>
#29 0x00007f7f496c7a3c in fast_function (nk=<optimized out>, na=<optimized 
out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at 
Python/ceval.c:4117
        co = 0x200000000
        nd = 0
        globals = 0x200000000
        argdefs = <optimized out>
        d = <optimized out>
#30 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at 
Python/ceval.c:4042
        func = 0x6d448c0
        w = <optimized out>
        nk = <optimized out>
        n = <optimized out>
        pfunc = 0x95c1078
#31 PyEval_EvalFrameEx (f=0x95c0b40, throwflag=<optimized out>) at 
Python/ceval.c:2666
        sp = 0x95c10d0
        stack_pointer = <optimized out>
        next_instr = 0x22150d4 "}Z"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = <optimized out>
        v = <optimized out>
        w = <optimized out>
        u = <optimized out>
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x95c1068
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f48902d30
        instr_ub = 3683
        instr_lb = 3644
        instr_prev = 3677
        first_instr = 0x2214274 "t"
        names = 0x22057e0
        consts = 0x2205310
#32 0x00007f7f496c9578 in PyEval_EvalCodeEx (co=0x7f7f48902d30, 
globals=<optimized out>, locals=<optimized out>, args=0x0, argcount=<optimized 
out>, kws=<optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/ceval.c:3253
        f = 0x95c0b40
        retval = <optimized out>
        freevars = <optimized out>
        tstate = 0x19c70c0
        x = <optimized out>
        u = <optimized out>
#33 0x00007f7f496c7a3c in fast_function (nk=<optimized out>, na=<optimized 
out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at 
Python/ceval.c:4117
        co = 0x200000000
        nd = 0
        globals = 0x200000000
        argdefs = <optimized out>
        d = <optimized out>
#34 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at 
Python/ceval.c:4042
        func = 0x6d476e0
        w = <optimized out>
        nk = <optimized out>
        n = <optimized out>
        pfunc = 0x1b0ca28
#35 PyEval_EvalFrameEx (f=0x1b0c8a0, throwflag=<optimized out>) at 
Python/ceval.c:2666
        sp = 0x1b0ca50
        stack_pointer = <optimized out>
        next_instr = 0x224ba2d "Zy\001eC\001j\004"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = <optimized out>
        v = <optimized out>
        w = <optimized out>
        u = <optimized out>
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x1b0ca18
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f48902e30
        instr_ub = 14556
        instr_lb = 14535
        instr_prev = 14550
        first_instr = 0x2248154 "d"
        names = 0x224d240
        consts = 0x224bd60
#36 0x00007f7f496c9578 in PyEval_EvalCodeEx (co=0x7f7f48902e30, 
globals=<optimized out>, locals=<optimized out>, args=0x0, argcount=<optimized 
out>, kws=<optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/ceval.c:3253
        f = 0x1b0c8a0
        retval = <optimized out>
        freevars = <optimized out>
        tstate = 0x19c70c0
        x = <optimized out>
        u = <optimized out>
#37 0x00007f7f496c9692 in PyEval_EvalCode (co=0x200000000, globals=0x200000000, 
locals=0x98cfbb0) at Python/ceval.c:667
No locals.
#38 0x00007f7f496e9740 in run_mod (arena=<optimized out>, flags=<optimized 
out>, locals=<optimized out>, globals=<optimized out>, filename=<optimized 
out>, mod=<optimized out>) at Python/pythonrun.c:1347
        co = 0x7f7f48902e30
#39 PyRun_FileExFlags (fp=0x1ae6b20, filename=<optimized out>, start=<optimized 
out>, globals=<optimized out>, locals=0x1a06180, closeit=1, flags=0x0) at 
Python/pythonrun.c:1333
        ret = 0x200000000
        mod = 0x2612c00
        arena = 0x1b1c000
#40 0x00007f7f496c02b3 in builtin_execfile (self=<optimized out>, 
args=<optimized out>) at Python/bltinmodule.c:792
        filename = 0x7f7f488eb984 "test_fullugly.py"
        globals = 0x1a06180
        locals = 0x1a06180
        res = <optimized out>
        fp = 0x1ae6b20
        cf = {cf_flags = 0}
#41 0x00007f7f496c7ce1 in call_function (oparg=<optimized out>, 
pp_stack=<optimized out>) at Python/ceval.c:4021
        callargs = 0x7f7f48850a10
        flags = <optimized out>
        tstate = 0x7f7f25155580 <typeinfo for GiNaC::basic>
        func = 0x7f7f49b8d248
        w = <optimized out>
        nk = <optimized out>
        n = <optimized out>
        pfunc = 0x1b19e38
#42 PyEval_EvalFrameEx (f=0x1b19cc0, throwflag=<optimized out>) at 
Python/ceval.c:2666
        sp = 0x1b19e40
        stack_pointer = <optimized out>
        next_instr = 0x7f7f488eb9fd "\001d\001"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = <optimized out>
        v = <optimized out>
        w = <optimized out>
        u = <optimized out>
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x1b19e38
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f4884ecb0
        instr_ub = 2147483647
        instr_lb = 0
        instr_prev = 6
        first_instr = 0x7f7f488eb9f4 "e"
        names = 0x7f7f48850a90
        consts = 0x7f7f49a6bc68
#43 0x00007f7f496c9578 in PyEval_EvalCodeEx (co=0x7f7f4884ecb0, 
globals=<optimized out>, locals=<optimized out>, args=0x0, argcount=<optimized 
out>, kws=<optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/ceval.c:3253
        f = 0x1b19cc0
        retval = <optimized out>
        freevars = <optimized out>
        tstate = 0x19c70c0
        x = <optimized out>
        u = <optimized out>
#44 0x00007f7f496c9692 in PyEval_EvalCode (co=0x200000000, globals=0x200000000, 
locals=0x98cfbb0) at Python/ceval.c:667
No locals.
#45 0x00007f7f496e7c9c in run_mod (arena=<optimized out>, flags=<optimized 
out>, locals=<optimized out>, globals=<optimized out>, filename=<optimized 
out>, mod=<optimized out>) at Python/pythonrun.c:1347
        co = 0x7f7f4884ecb0
#46 PyRun_StringFlags (str=0x7f7f488e2b4c "execfile('test_fullugly.py')\n", 
start=257, globals=0x1a06180, locals=0x1a06180, flags=<optimized out>) at 
Python/pythonrun.c:1310
        ret = 0x200000000
        mod = <optimized out>
        arena = 0x1a0d8a0
#47 0x00007f7f496c64fc in exec_statement (locals=<optimized out>, 
globals=<optimized out>, prog=<optimized out>, f=<optimized out>) at 
Python/ceval.c:4754
        str = 0x7f7f488e2b4c "execfile('test_fullugly.py')\n"
        cf = {cf_flags = 0}
        n = <optimized out>
        v = <optimized out>
        plain = 0
#48 PyEval_EvalFrameEx (f=0x1ae2710, throwflag=<optimized out>) at 
Python/ceval.c:1880
        stack_pointer = 0x1ae28b0
        next_instr = 0x7f7f49b2ced6 "Wn\021"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = 0x1a06180
        v = 0x1a06180
        w = <optimized out>
        u = <optimized out>
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x1ae28b0
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f48841c30
        instr_ub = 134
        instr_lb = 120
        instr_prev = 129
        first_instr = 0x7f7f49b2ce54 "|\002"
        names = 0x7f7f49aa9770
        consts = 0x7f7f48838cb0
#49 0x00007f7f496c9578 in PyEval_EvalCodeEx (co=0x7f7f48841c30, 
globals=<optimized out>, locals=<optimized out>, args=0x4, argcount=<optimized 
out>, kws=<optimized out>, kwcount=0, defs=0x7f7f49a6b770, defcount=2, 
closure=0x0)
    at Python/ceval.c:3253
        f = 0x1ae2710
        retval = <optimized out>
        freevars = <optimized out>
        tstate = 0x19c70c0
        x = <optimized out>
        u = <optimized out>
#50 0x00007f7f496c7a3c in fast_function (nk=<optimized out>, na=<optimized 
out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at 
Python/ceval.c:4117
        co = 0x200000000
        nd = 2
        globals = 0x200000000
        argdefs = <optimized out>
        d = <optimized out>
#51 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at 
Python/ceval.c:4042
        func = 0x7f7f48848f50
        w = <optimized out>
        nk = <optimized out>
        n = <optimized out>
        pfunc = 0x1b1bfc8
#52 PyEval_EvalFrameEx (f=0x1b1be30, throwflag=<optimized out>) at 
Python/ceval.c:2666
        sp = 0x1b1bfd8
        stack_pointer = <optimized out>
        next_instr = 0x7f7f48832aa4 "\001d"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = <optimized out>
        v = <optimized out>
        w = <optimized out>
        u = <optimized out>
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x1b1bfc8
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f488ec5b0
        instr_ub = -1
        instr_lb = 0
        instr_prev = -1
        first_instr = 0x7f7f48832a2c "d\001"
        names = 0x7f7f49a72c88
        consts = 0x7f7f488ec550
#53 0x00007f7f496c896b in fast_function (nk=<optimized out>, na=<optimized 
out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at 
Python/ceval.c:4107
        i = 32
        f = 0x1b1be30
        tstate = 0x19c70c0
        stack = 0x200000000
        co = <optimized out>
        nd = <optimized out>
        globals = <optimized out>
        argdefs = <optimized out>
        d = <optimized out>
#54 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at 
Python/ceval.c:4042
        func = 0x7f7f488f25f0
        w = <optimized out>
        nk = <optimized out>
        n = 32060000
        pfunc = 0x1aeb790
#55 PyEval_EvalFrameEx (f=0x1aeb600, throwflag=<optimized out>) at 
Python/ceval.c:2666
        sp = 0x1aeb7a0
        stack_pointer = <optimized out>
        next_instr = 0x1b199ca "\001|\001"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = 0x0
        v = <optimized out>
        w = <optimized out>
        u = <optimized out>
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x1aeb790
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f488ecb30
        instr_ub = -1
        instr_lb = 0
        instr_prev = -1
        first_instr = 0x1b19914 "t"
        names = 0x7f7f49a98d50
        consts = 0x7f7f48851488
#56 0x00007f7f496c896b in fast_function (nk=<optimized out>, na=<optimized 
out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at 
Python/ceval.c:4107
        i = 32
        f = 0x1aeb600
        tstate = 0x19c70c0
        stack = 0x200000000
        co = <optimized out>
        nd = <optimized out>
        globals = <optimized out>
        argdefs = <optimized out>
        d = <optimized out>
#57 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at 
Python/ceval.c:4042
        func = 0x7f7f488f2a28
        w = <optimized out>
        nk = <optimized out>
        n = 32060000
        pfunc = 0x1afb568
#58 PyEval_EvalFrameEx (f=0x1afb3f0, throwflag=<optimized out>) at 
Python/ceval.c:2666
        sp = 0x1afb570
        stack_pointer = <optimized out>
        next_instr = 0x1afba9a "\001n"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = 0x0
        v = <optimized out>
        w = <optimized out>
        u = <optimized out>
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x1afb568
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f48833230
        instr_ub = -1
        instr_lb = 0
        instr_prev = -1
        first_instr = 0x1afb914 "d"
        names = 0x1af5eb0
        consts = 0x1aed450
#59 0x00007f7f496c9578 in PyEval_EvalCodeEx (co=0x7f7f48833230, 
globals=<optimized out>, locals=<optimized out>, args=0x0, argcount=<optimized 
out>, kws=<optimized out>, kwcount=0, defs=0x0, defcount=0, closure=0x0)
    at Python/ceval.c:3253
        f = 0x1afb3f0
        retval = <optimized out>
        freevars = <optimized out>
        tstate = 0x19c70c0
        x = <optimized out>
        u = <optimized out>
#60 0x00007f7f496c9692 in PyEval_EvalCode (co=0x200000000, globals=0x200000000, 
locals=0x98cfbb0) at Python/ceval.c:667
No locals.
#61 0x00007f7f496c7d7e in exec_statement (locals=<optimized out>, 
globals=<optimized out>, prog=<optimized out>, f=<optimized out>) at 
Python/ceval.c:4718
        n = <optimized out>
        v = <optimized out>
        plain = 0
#62 PyEval_EvalFrameEx (f=0x1b18c80, throwflag=<optimized out>) at 
Python/ceval.c:1880
        stack_pointer = 0x1b18e30
        next_instr = 0x7f7f49adf10a "|\001"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = 0x1a06180
        v = 0x1a06180
        w = <optimized out>
        u = 0x20
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x1b18e30
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f49a7ceb0
        instr_ub = -1
        instr_lb = 0
        instr_prev = -1
        first_instr = 0x7f7f49adf0c4 "|\002"
        names = 0x7f7f49a82440
        consts = 0x7f7f49a77598
#63 0x00007f7f496c9578 in PyEval_EvalCodeEx (co=0x7f7f49a7ceb0, 
globals=<optimized out>, locals=<optimized out>, args=0x1a91368, 
argcount=<optimized out>, kws=<optimized out>, kwcount=0, defs=0x7f7f49add7e8, 
defcount=5, 
    closure=0x0) at Python/ceval.c:3253
        f = 0x1b18c80
        retval = <optimized out>
        freevars = <optimized out>
        tstate = 0x19c70c0
        x = <optimized out>
        u = <optimized out>
#64 0x00007f7f496c7a3c in fast_function (nk=<optimized out>, na=<optimized 
out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at 
Python/ceval.c:4117
        co = 0x200000000
        nd = 5
        globals = 0x200000000
        argdefs = <optimized out>
        d = <optimized out>
#65 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at 
Python/ceval.c:4042
        func = 0x7f7f49a9ab90
        w = <optimized out>
        nk = <optimized out>
        n = <optimized out>
        pfunc = 0x1a91360
#66 PyEval_EvalFrameEx (f=0x1a911a0, throwflag=<optimized out>) at 
Python/ceval.c:2666
        sp = 0x1a913a0
        stack_pointer = <optimized out>
        next_instr = 0x7f7f49b8a72a "S"
        opcode = <optimized out>
        oparg = <optimized out>
        why = <optimized out>
        err = <optimized out>
        x = <optimized out>
        v = <optimized out>
        w = <optimized out>
        u = <optimized out>
        t = <optimized out>
        stream = <optimized out>
        freevars = 0x1a91360
        retval = 0x0
        tstate = 0x19c70c0
        co = 0x7f7f49a85eb0
        instr_ub = -1
        instr_lb = 0
        instr_prev = -1
        first_instr = 0x7f7f49b8a654 "yF"
        names = 0x7f7f49b9bcd0
        consts = 0x7f7f49a77738
#67 0x00007f7f496c9578 in PyEval_EvalCodeEx (co=0x7f7f49a85eb0, 
globals=<optimized out>, locals=<optimized out>, args=0x7f7f49a82e78, 
argcount=<optimized out>, kws=<optimized out>, kwcount=0, defs=0x7f7f49a97628, 
defcount=1, 
    closure=0x0) at Python/ceval.c:3253
        f = 0x1a911a0
        retval = <optimized out>
        freevars = <optimized out>
        tstate = 0x19c70c0
        x = <optimized out>
        u = <optimized out>
#68 0x00007f7f49646191 in function_call (func=0x7f7f49a9b140, 
arg=0x7f7f49a82e60, kw=0x0) at Objects/funcobject.c:526
        result = <optimized out>
        argdefs = <optimized out>
        kwtuple = <optimized out>
        d = <optimized out>
        nk = <optimized out>
        nd = 1
#69 0x00007f7f496168f3 in PyObject_Call (func=0x7f7f49a9b140, arg=0x200000000, 
kw=0x98cfbb0) at Objects/abstract.c:2529
        result = 0x1
        call = 0x7f7f49646100 <function_call>
#70 0x00007f7f496fd2de in RunModule (module=<optimized out>, set_argv0=1) at 
Modules/main.c:192
        runpy = <optimized out>
        runmodule = <optimized out>
        runargs = <optimized out>
        result = <optimized out>
#71 0x00007f7f496fdd5b in Py_Main (argc=2, argv=0x7fff76fa7b38) at 
Modules/main.c:586
        c = <optimized out>
        sts = <optimized out>
        command = 0x0
        filename = <optimized out>
        module = 0x19c7010 "pdb"
        fp = 0x7f7f48d206a0 <_IO_2_1_stdin_>
        p = <optimized out>
        unbuffered = <optimized out>
        skipfirstline = 0
        stdin_is_interactive = 1
        help = <optimized out>
        version = <optimized out>
        saw_unbuffered_flag = 0
        cf = {cf_flags = 0}
#72 0x00007f7f489bec4d in __libc_start_main () from /lib/libc.so.6
No symbol table info available.
#73 0x00000000004006d9 in _start ()
No symbol table info available.


Cython backtrace (newest frame = last)
--------------------------------------
#0  0x00000000004006b0 in _start()
#1  0x00007f7f489beb50 in __libc_start_main()
#2  0x00007f7f496fd4a0 in Py_Main()
#3  0x00007f7f496fd260 in RunModule()
#4  0x00007f7f496168a0 in PyObject_Call()
#5  0x00007f7f49646100 in function_call()
#6  0x00007f7f496c8cd0 in PyEval_EvalCodeEx()
#7  0x00007f7f496c2160 in _run_module_as_main() at 
/home/frichter/sage-5.8/local/lib/python2.7/runpy.py:162
   157        pkg_name = mod_name.rpartition('.')[0]
   158        main_globals = sys.modules["__main__"].__dict__
   159        if alter_argv:
   160            sys.argv[0] = fname
   161        return _run_code(code, main_globals, None,
>  162                         "__main__", fname, loader, pkg_name)
   163    
   164    def run_module(mod_name, init_globals=None,
   165                   run_name=None, alter_sys=False):
   166        """Execute a module's code without importing it
#8  0x00007f7f496c571d in call_function()
#9  0x00007f7f496c79c9 in fast_function()
#10 0x00007f7f496c8cd0 in PyEval_EvalCodeEx()
#11 0x00007f7f496c2160 in _run_code() at 
/home/frichter/sage-5.8/local/lib/python2.7/runpy.py:72
    67            run_globals.update(init_globals)
    68        run_globals.update(__name__ = mod_name,
    69                           __file__ = mod_fname,
    70                           __loader__ = mod_loader,
    71                           __package__ = pkg_name)
>   72        exec code in run_globals
    73        return run_globals
    74    
    75    def _run_module_code(code, init_globals=None,
    76                        mod_name=None, mod_fname=None,
#12 0x00007f7f496c2c80 in exec_statement()
#13 0x00007f7f496c9660 in PyEval_EvalCode()
#14 0x00007f7f496c8cd0 in PyEval_EvalCodeEx()
#15 0x00007f7f496c2160 in <module>() at 
/home/frichter/sage-5.8/local/lib/python2.7/pdb.py:1338
  1333    
  1334    
  1335    # When invoked as main program, invoke the debugger on a script
  1336    if __name__ == '__main__':
  1337        import pdb
> 1338        pdb.main()
#16 0x00007f7f496c571d in call_function()
#17 0x00007f7f496c79c9 in fast_function()
#18 0x00007f7f496c2160 in main() at 
/home/frichter/sage-5.8/local/lib/python2.7/pdb.py:1314
  1309        # changed by the user from the command line. There is a "restart" 
command
  1310        # which allows explicit specification of command line arguments.
  1311        pdb = Pdb()
  1312        while True:
  1313            try:
> 1314                pdb._runscript(mainpyfile)
  1315                if pdb._user_requested_quit:
  1316                    break
  1317                print "The program finished and will be restarted"
  1318            except Restart:
#19 0x00007f7f496c571d in call_function()
#20 0x00007f7f496c79c9 in fast_function()
#21 0x00007f7f496c2160 in _runscript() at 
/home/frichter/sage-5.8/local/lib/python2.7/pdb.py:1233
  1228            # user_call for details).
  1229            self._wait_for_mainpyfile = 1
  1230            self.mainpyfile = self.canonic(filename)
  1231            self._user_requested_quit = 0
  1232            statement = 'execfile(%r)' % filename
> 1233            self.run(statement)
  1234    
  1235    # Simplified interface
  1236    
  1237    def run(statement, globals=None, locals=None):
#22 0x00007f7f496c571d in call_function()
#23 0x00007f7f496c79c9 in fast_function()
#24 0x00007f7f496c8cd0 in PyEval_EvalCodeEx()
#25 0x00007f7f496c2160 in run() at 
/home/frichter/sage-5.8/local/lib/python2.7/bdb.py:387
   382            self.reset()
   383            sys.settrace(self.trace_dispatch)
   384            if not isinstance(cmd, types.CodeType):
   385                cmd = cmd+'\n'
   386            try:
>  387                exec cmd in globals, locals
   388            except BdbQuit:
   389                pass
   390            finally:
   391                self.quitting = 1
#26 0x00007f7f496c2c80 in exec_statement()
#27 0x00007f7f496e7c10 in PyRun_StringFlags()
#28 0x00007f7f496e7c72 in run_mod()
#29 0x00007f7f496c9660 in PyEval_EvalCode()
#30 0x00007f7f496c8cd0 in PyEval_EvalCodeEx()
#31 0x00007f7f496c2160 in <module>() at <string>:1
#32 0x00007f7f496c571d in call_function()
#33 0x00007f7f496c0120 in builtin_execfile()
#34 0x00007f7f496e9690 in PyRun_FileExFlags()
#35 0x00007f7f496e9713 in run_mod()
#36 0x00007f7f496c9660 in PyEval_EvalCode()
#37 0x00007f7f496c8cd0 in PyEval_EvalCodeEx()
#38 0x00007f7f496c2160 in <module>() at test_fullugly.py:3479
  3474            #print "len(data_XD) :",len(data_XD)
  3475            #print "data_XD",data_XD
  3476            #print "ctL_XD",ctL_XD
  3477            #print "toL_XD",toL_XD
  3478            combitovibL.append([coo,[]])  # for mctdh parallel execution 
later
> 3479            res_XD=iterXD(coo,data_XD,ctL_XD,toL_XD)
  3480            # returned :  ctXRL,toXRL,data
  3481    
  3482            # START actualise  convcooL,dataL,ctL,toL
  3483            convcooL.append(coo)
#39 0x00007f7f496c571d in call_function()
#40 0x00007f7f496c79c9 in fast_function()
#41 0x00007f7f496c8cd0 in PyEval_EvalCodeEx()
#42 0x00007f7f496c2160 in iterXD() at test_fullugly.py:2662
  2657    #        print "toXRL         ",toXRL
  2658    #        print "toXRL_lastgood",toXRL_lastgood
  2659    #        print "Xdata",Xdata
  2660    #        print "len(Xdata)",len(Xdata)
  2661    #        print "len(toXRL)",len(toXRL)
> 2662            
> resNP=NP2(coo,Xdata,ctL,toL,ctXL,toXL,ctXRL,toXRL,ctXRL_lastgood,toXRL_lastgood)
  2663         #RMS check
  2664            f=f_0+sum([prod(ctXR) for ctXR in ctXRL ])
  2665            fastf=fast_callable(f,vars=xpL)
  2666            rms=sum([ (fastf(*dat[:-_sage_const_1 ])-dat[-_sage_const_1 
])**_sage_const_2  for dat in data])
#43 0x00007f7f496c571d in call_function()
#44 0x00007f7f496c79c9 in fast_function()
#45 0x00007f7f496c8cd0 in PyEval_EvalCodeEx()
#46 0x00007f7f496c2160 in NP2() at test_fullugly.py:865
   860            #SEGF
   861            f_lastgood=mysubs(f_lastgood,[[xL[0],xL[0]]])
   862            f=mysubs(f,[[xL[0],xL[0]]])
   863            #SEGF
   864            avrho=_sage_const_1 -tanh( exp(_sage_const_100p0 
*(f_lastgood-maxE/_sage_const_220000p0 ))-exp(-_sage_const_100p0 
*maxE/_sage_const_220000p0 ))
>  865            varfu=((f1-f)**_sage_const_2 +(f2-f)**_sage_const_2 
> )**_sage_const_0p5 *avrho
   866            #print "varfu",varfu
   867            varfu_in_varfuDR=fast_callable(varfu,vars=xL)
   868            varAL.append(numpy.fromfunction(varfuDR,nmL))
   869            varA+=varAL[-_sage_const_1 ]
#47 0x00007f7f4961aaa0 in PyNumber_Subtract()
#48 0x00007f7f4961aaaa in binary_op()
#49 0x00007f7f49617390 in binary_op1()
#50 0x00007f7f3f138060 in __sub__() at 
/home/frichter/sage-5.8/devel/sage-main/sage/structure/element.pyx:1545
  1540    
  1541        cdef RingElement _add_long(self, long n):
  1542            """
  1543            Generic path for adding a C long, assumed to commute.
  1544            """
> 1545            return coercion_model.bin_op(self, n, add)
  1546    
  1547        def __sub__(left, right):
  1548            """
  1549            Top-level subtraction operator for RingElements.
#51 0x00007f7f3f13807b in 
__pyx_pf_4sage_9structure_7element_11RingElement_4__sub__() at 
/home/frichter/sage-5.8/devel/sage-main/sage/structure/element.c:13806
  13801     *                 return 
(<ModuleElement>left)._sub_(<ModuleElement>right)             # <<<<<<<<<<<<<<
  13802     *         if PyInt_CheckExact(right):
  13803     *             n = PyInt_AS_LONG(right)
  13804     */
  13805          __Pyx_XDECREF(__pyx_r);
> 13806          __pyx_t_2 = ((PyObject *)((struct 
> __pyx_vtabstruct_4sage_9structure_7element_ModuleElement *)((struct 
> __pyx_obj_4sage_9structure_7element_ModuleElement 
> *)__pyx_v_left)->__pyx_base.__pyx_vtab)->_sub_(((struct 
> __pyx_obj_4sage_9structure_7element_ModuleElement *)__pyx_v_left), ((struct 
> __pyx_obj_4sage_9structure_7element_ModuleElement *)__pyx_v_right), 0)); if 
> (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1558; 
> __pyx_clineno = __LINE__; goto __pyx_L1_error;}
  13807          __Pyx_GOTREF(__pyx_t_2);
  13808          __pyx_r = __pyx_t_2;
  13809          __pyx_t_2 = 0;
  13810          goto __pyx_L0;
#52 0x00007f7f24a0b7b0 in _sub_() at 
/home/frichter/sage-5.8/devel/sage-main/sage/symbolic/expression.pyx:2458
  2453            elif is_a_relational(_right._gobj):
  2454                x = relational(gsub(left._gobj, _right._gobj.lhs()),
  2455                               gsub(left._gobj, _right._gobj.rhs()),
  2456                               relational_operator(_right._gobj))
  2457            else:
> 2458                x = gsub(left._gobj, _right._gobj)
  2459            return new_Expression_from_GEx(left._parent, x)
  2460    
  2461        cpdef RingElement _mul_(left, RingElement right):
  2462            """
#53 0x0000000000000000 in GiNaC::operator-(GiNaC::ex const&, GiNaC::ex const&)()
#54 0x0000000000000000 in GiNaC::exminus(GiNaC::ex const&)()
#55 0x0000000000000000 in GiNaC::ex::ex(GiNaC::basic const&)()
#56 0x0000000000000000 in GiNaC::ex::construct_from_basic(GiNaC::basic const&)()
#57 0x0000000000000000 in GiNaC::mul::eval(int) const()
#58 0x0000000000000000 in 
GiNaC::add::add(std::auto_ptr<std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > >, GiNaC::ex const&)()
#59 0x0000000000000000 in 
GiNaC::expairseq::construct_from_epvector(std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > const&, bool)()
#60 0x0000000000000000 in GiNaC::expairseq::canonicalize()()
#61 0x0000000000000000 in void 
std::sort<__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
GiNaC::expair_rest_is_less>(__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
__gnu_cxx::__normal_iterator<GiNaC::expair*, std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > >, GiNaC::expair_rest_is_less)()
#62 0x0000000000000000 in void 
std::__final_insertion_sort<__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
GiNaC::expair_rest_is_less>(__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
__gnu_cxx::__normal_iterator<GiNaC::expair*, std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > >, GiNaC::expair_rest_is_less)()
#63 0x0000000000000000 in void 
std::__unguarded_insertion_sort<__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
GiNaC::expair_rest_is_less>(__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, 
__gnu_cxx::__normal_iterator<GiNaC::expair*, std::vector<GiNaC::expair, 
std::allocator<GiNaC::expair> > >, GiNaC::expair_rest_is_less)()
#64 0x0000000000000000 in void 
std::__unguarded_linear_insert<__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, GiNaC::expair, 
GiNaC::expair_rest_is_less>(__gnu_cxx::__normal_iterator<GiNaC::expair*, 
std::vector<GiNaC::expair, std::allocator<GiNaC::expair> > >, GiNaC::expair, 
GiNaC::expair_rest_is_less)()
#65 0x0000000000000000 in GiNaC::expair_rest_is_less::operator()(GiNaC::expair 
const&, GiNaC::expair const&) const()
#66 0x0000000000000000 in GiNaC::ex::compare(GiNaC::ex const&) const()
#67 0x0000000000000000 in GiNaC::power::compare(GiNaC::basic const&) const()
#68 0x0000000000000000 in GiNaC::basic::tinfo() const()
#69 0x00007f7f493bf8f0 in __restore_rt()
#70 0x00007f7f4673a305 in sage_signal_handler()
#71 0x00007f7f4673ac79 in sigdie()
#72 0x00007f7f4673ab0b in print_enhanced_backtrace()
#73 0x00007f7f493bf430 in waitpid()


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