Using Python 2.5.2 from python.org on Mac OS X 10.5, I get the same 
error:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: 13 at address: 0x0000ad40
0x0052ed30 in ?? ()
(gdb) bt
#0  0x0052ed30 in ?? ()
#1  0x0002ad41 in frame_dealloc (f=0x61cca0) at 
Objects/frameobject.c:416
#2  0x0002adf2 in frame_dealloc (f=0x61ea10) at 
Objects/frameobject.c:424
#3  0x0002adf2 in frame_dealloc (f=0x61eb70) at 
Objects/frameobject.c:424
#4  0x0004574b in _PyTrash_destroy_chain () at Objects/object.c:2136
#5  0x000aebc2 in PyErr_Clear () at Python/errors.c:231
#6  0x000234fb in PyFile_SoftSpace (f=0x700cb0, newflag=0) at 
Objects/fileobject.c:2127
#7  0x0009b819 in PyEval_EvalFrameEx (f=0x61b840, throwflag=0) at 
Python/ceval.c:1608
#8  0x0009f29a in PyEval_EvalCodeEx (co=0x595410, globals=0x52ed20, 
locals=0x52ed20, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, 
defcount=0, closure=0x0) at Python/ceval.c:2836
#9  0x0009f3a7 in PyEval_EvalCode (co=0x595410, globals=0x52ed20, 
locals=0x52ed20) at Python/ceval.c:494
#10 0x000c31d7 in PyRun_FileExFlags (fp=0xa0125de0, filename=0xbffff0cc, 
start=257, globals=0x52ed20, locals=0x52ed20, closeit=1, 
flags=0xbfffef3c) at Python/pythonrun.c:1273
#11 0x000c3583 in PyRun_SimpleFileExFlags (fp=0xa0125de0, 
filename=0xbffff0cc, closeit=1, flags=0xbfffef3c) at 
Python/pythonrun.c:879
#12 0x000d1d27 in Py_Main (argc=1, argv=0xbfffefb8) at 
Modules/main.c:523
#13 0x00001bcc in _start ()
#14 0x00001af9 in start ()
(gdb) info locals
No symbol table info available.
(gdb) up
#1  0x0002ad41 in frame_dealloc (f=0x61cca0) at 
Objects/frameobject.c:416
416	                Py_CLEAR(*p);
(gdb) info locals
p = (PyObject **) 0x61cdd8
valuestack = (PyObject **) 0x61cde0
co = (PyCodeObject *) 0x61cdd8
f = (PyFrameObject *) 0x61cca0

[...]

(gdb) up
#6  0x000234fb in PyFile_SoftSpace (f=0x700cb0, newflag=0) at 
Objects/fileobject.c:2127
2127				PyErr_Clear();
(gdb) info locals
v = (PyObject *) 0x0
oldflag = 0
f = (PyObject *) 0x700cb0
(gdb) up
#7  0x0009b819 in PyEval_EvalFrameEx (f=0x61b840, throwflag=0) at 
Python/ceval.c:1608
1608						PyFile_SoftSpace(w, 0);
(gdb) info locals
stack_pointer = (PyObject **) 0x0
next_instr = (unsigned char *) 0x61e5e0 "?(\r"
opcode = 0
oparg = 7343280
why = 7343280
err = 0
x = (PyObject *) 0x0
v = (PyObject *) 0x700cb0
w = (PyObject *) 0xffffffff
u = (PyObject *) 0x700cb0
t = (PyObject *) 0x0
stream = (PyObject *) 0x0
fastlocals = (PyObject **) 0x61b978
freevars = (PyObject **) 0x61b978
retval = (PyObject *) 0x0
tstate = (PyThreadState *) 0x600170
co = (PyCodeObject *) 0x595410
instr_ub = -1
instr_lb = 0
instr_prev = -1
first_instr = (unsigned char *) 0x704034 "d"
names = (PyObject *) 0x58a4b0
consts = (PyObject *) 0x597ab0

From what I see on python.org, the advertised policy is to fix bugs 
affecting the stability of the interpreter. I don't know if it's 
relevant to the 2.5 crash, but using Python 2.4.5 from python.org on 
Debian x86 I'm able to get a more detailed backtrace:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1210747200 (LWP 11771)]
PyEval_EvalCodeEx (co=0xb7cf7ba0, globals=0xb7d30824, locals=0x0, 
args=0xb7cfd9b8, argcount=2, kws=0x0, kwcount=0, defs=0x0, defcount=0, 
closure=0x0) at Python/ceval.c:2571
2571				Py_INCREF(x);
(gdb) bt
#0  PyEval_EvalCodeEx (co=0xb7cf7ba0, globals=0xb7d30824, locals=0x0, 
args=0xb7cfd9b8, argcount=2, kws=0x0, kwcount=0, defs=0x0, defcount=0, 
closure=0x0) at Python/ceval.c:2571
#1  0x080ffab9 in function_call (func=0xb7d00064, arg=0xb7cfd9ac, 
kw=0x0) at Objects/funcobject.c:548
#2  0x0805adbc in PyObject_CallFunction (callable=0xb7d00064, 
format=0x8115c8b "OO") at Objects/abstract.c:1795
#3  0x08097634 in slot_tp_getattr_hook (self=0xb7cfd9ac, 
name=0xb7cfdc60) at Objects/typeobject.c:4607
#4  0x080b69b2 in PyEval_EvalFrame (f=0x81a5b6c) at Python/ceval.c:1957

[with the same stack trace as above continuing...]

#155 0x080b9785 in PyEval_EvalCodeEx (co=0xb7cf7ba0, globals=0xb7d30824, 
locals=0x0, args=0xb7cfde58, argcount=2, kws=0x0, kwcount=0, defs=0x0, 
defcount=0, closure=0x0) at Python/ceval.c:2741
#156 0x080ffab9 in function_call (func=0xb7d00064, arg=0xb7cfde4c, 
kw=0x0) at Objects/funcobject.c:548
#157 0x0805adbc in PyObject_CallFunction (callable=0xb7d00064, 
format=0x8115c8b "OO") at Objects/abstract.c:1795
#158 0x08097634 in slot_tp_getattr_hook (self=0xb7cfd9ac, 
name=0xb7cfdc60) at Objects/typeobject.c:4607
#159 0x080b69b2 in PyEval_EvalFrame (f=0x81a9084) at Python/ceval.c:1957
#160 0x080b9785 in PyEval_EvalCodeEx (co=0xb7cf7ba0, globals=0xb7d30824, 
locals=0x0, args=0xb7cfde98, argcount=2, kws=0x0, kwcount=0, defs=0x0, 
defcount=0, closure=0x0) at Python/ceval.c:2741
#161 0x080ffab9 in function_call (func=0xb7d00064, arg=0xb7cfde8c, 
kw=0x0) at Objects/funcobject.c:548
#162 0x0805adbc in PyObject_CallFunction (callable=0xb7d00064, 
format=0x8115c8b "OO") at Objects/abstract.c:1795
#163 0x08097634 in slot_tp_getattr_hook (self=0xb7cfd9ac, 
name=0xb7ce8c78) at Objects/typeobject.c:4607
#164 0x0807e6a9 in PyObject_GetAttrString (v=0xb7cfd9ac, name=0x810748e 
"softspace") at Objects/object.c:1031
#165 0x08064fb1 in PyFile_SoftSpace (f=0xb7cfd9ac, newflag=0) at 
Objects/fileobject.c:1994
#166 0x080b540e in PyEval_EvalFrame (f=0x81a2ac4) at Python/ceval.c:1584
#167 0x080b9785 in PyEval_EvalCodeEx (co=0xb7cf7ce0, globals=0xb7d30824, 
locals=0xb7d30824, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, 
defcount=0, closure=0x0) at Python/ceval.c:2741
#168 0x080b97e9 in PyEval_EvalCode (co=0xb7cf7ce0, globals=0xb7d30824, 
locals=0xb7d30824) at Python/ceval.c:484
#169 0x080dc097 in PyRun_FileExFlags (fp=0x8145008, filename=0xbf9239e3 
"[...]/crash5.py", start=257, globals=0xb7d30824, locals=0xb7d30824, 
closeit=1, flags=0xbf9228f4) at Python/pythonrun.c:1287
#170 0x080dc294 in PyRun_SimpleFileExFlags (fp=0x8145008, 
filename=0xbf9239e3 "[...]/crash5.py", closeit=1, flags=0xbf9228f4) at 
Python/pythonrun.c:871
#171 0x08055bc8 in Py_Main (argc=1, argv=0xbf9229b4) at 
Modules/main.c:493
#172 0x08055052 in main (argc=Cannot access memory at address 0x2
) at Modules/python.c:23

Locals:

(gdb) info locals
i = 0
n = 2
kwdict = (PyObject *) 0x0
f = (PyFrameObject *) 0x81a5ce4
retval = <value optimized out>
fastlocals = (PyObject **) 0x81a5e30
freevars = (PyObject **) 0x81a5e38
tstate = (PyThreadState *) 0x81451b0
x = (PyObject *) 0x0
u = <value optimized out>

I can't reproduce the crash on Linux with Python 2.5.