sage stopped working suddenly

edit

I didn't do anything to the sage install.(I have upgraded by system yesterday) And suddenly today sage stopped working and this is being displayed.

/opt/sage/local/lib/libpython2.7.so.1.0(+0x10b0de)[0x7f38414160de]
/opt/sage/local/lib/libpython2.7.so.1.0(+0x10b353)[0x7f3841416353]
/opt/sage/local/lib/libpython2.7.so.1.0(+0x10b8bc)[0x7f38414168bc]
/opt/sage/local/lib/libpython2.7.so.1.0(PyImport_ImportModuleLevel+0x3a)[0x7f3841416e2a]
/opt/sage/local/lib/libpython2.7.so.1.0(+0xeb52f)[0x7f38413f652f]
/opt/sage/local/lib/libpython2.7.so.1.0(PyObject_Call+0x4e)[0x7f384135690e]
/opt/sage/local/lib/libpython2.7.so.1.0(PyEval_CallObjectWithKeywords+0x47)[0x7f38413f7ff7]
/opt/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x1f1d)[0x7f38413fa49d]
/opt/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x848)[0x7f38413fee68]
/opt/sage/local/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7f38413fefa2]
/opt/sage/local/lib/libpython2.7.so.1.0(PyRun_FileExFlags+0xaa)[0x7f38414207ca]
/opt/sage/local/lib/libpython2.7.so.1.0(PyRun_SimpleFileExFlags+0xdb)[0x7f38414211fb]
/opt/sage/local/lib/libpython2.7.so.1.0(Py_Main+0xb82)[0x7f3841436342]
/lib/libc.so.6(__libc_start_main+0xf5)[0x7f3840673455]
python[0x4006b1]

------------------------------------------------------------------------
Unhandled SIGBUS: A bus error occurred in Sage.
This probably occurred because a *compiled* component of Sage has a bug
in it and is not properly wrapped with sig_on(), sig_off(). You might
want to run Sage under gdb with 'sage -gdb' to debug this.
Sage will now terminate.
------------------------------------------------------------------------
/opt/sage/spkg/bin/sage: line 671: 10989 Bus error               sage-notebook "$@"

I am using arch linux x86_64 running sage 5.0.1(manually compiled). How can I get it working again?

THis is the output of sage -gdb:

----------------------------------------------------------------------
| Sage Version 5.0, Release Date: 2012-05-14                         |
| Type notebook() for the GUI, and license() for information.        |
----------------------------------------------------------------------
/opt/sage/local/bin/sage-ipython
GNU gdb (GDB) 7.4.1
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/>...
Reading symbols from /opt/sage/local/bin/python...(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
Python 2.7.2 (default, May 19 2012, 19:46:00) 
[GCC 4.7.0 20120505 (prerelease)] on linux3
Type "help", "copyright", "credits" or "license" for more information.

Program received signal SIGBUS, Bus error.
0x00007ffff30b674d in ?? ()
   from /opt/sage/local/lib/python2.7/lib-dynload/_ctypes.so