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Importing foo2.py on Linux (with the current CVS HEAD
version of Python) gives me a segmentation fault with the
following stacktrace:
0x080606cc in instance_repr (inst=0xb7c158bc) at
Objects/classobject.c:880
880                     classname = inst->in_class->cl_name;
(gdb) bt
#0  0x080606cc in instance_repr (inst=0xb7c158bc) at
Objects/classobject.c:880
#1  0x08082235 in PyObject_Repr (v=0xb7c158bc) at
Objects/object.c:308
#2  0x080f3ccd in err_input (err=0xbfffe000) at
Python/pythonrun.c:1478
#3  0x080f3956 in PyParser_SimpleParseFileFlags
(fp=0x818d6e0, filename=0xbfffe530 "foo2.py", start=257,
flags=0)
    at Python/pythonrun.c:1348
#4  0x080f3982 in PyParser_SimpleParseFile (fp=0x818d6e0,
filename=0xbfffe530 "foo2.py", start=257)
    at Python/pythonrun.c:1355
#5  0x080e6fef in parse_source_module (pathname=0xbfffe530
"foo2.py", fp=0x818d6e0) at Python/import.c:761
#6  0x080e72db in load_source_module (name=0xbfffe9d0
"foo2", pathname=0xbfffe530 "foo2.py", fp=0x818d6e0)
    at Python/import.c:885
#7  0x080e86b4 in load_module (name=0xbfffe9d0 "foo2",
fp=0x818d6e0, buf=0xbfffe530 "foo2.py", type=1, loader=0x0)
    at Python/import.c:1656
#8  0x080e9d52 in import_submodule (mod=0x8145768,
subname=0xbfffe9d0 "foo2", fullname=0xbfffe9d0 "foo2")
    at Python/import.c:2250
#9  0x080e9511 in load_next (mod=0x8145768,
altmod=0x8145768, p_name=0xbfffedf0, buf=0xbfffe9d0 "foo2",
p_buflen=0xbfffe9cc)
    at Python/import.c:2070
#10 0x080e8e5e in import_module_ex (name=0x0,
globals=0xb7d62e94, locals=0xb7d62e94, fromlist=0x8145768)
    at Python/import.c:1905
#11 0x080e914b in PyImport_ImportModuleEx (name=0xb7cd8824
"foo2", globals=0xb7d62e94, locals=0xb7d62e94, 
    fromlist=0x8145768) at Python/import.c:1946
#12 0x080b5c87 in builtin___import__ (self=0x0,
args=0xb7d1e634) at Python/bltinmodule.c:45
#13 0x0811d32e in PyCFunction_Call (func=0xb7d523ec,
arg=0xb7d1e634, kw=0x0) at Objects/methodobject.c:73
#14 0x0805d188 in PyObject_Call (func=0xb7d523ec,
arg=0xb7d1e634, kw=0x0) at Objects/abstract.c:1757
#15 0x080ca79d in PyEval_CallObjectWithKeywords
(func=0xb7d523ec, arg=0xb7d1e634, kw=0x0) at Python/ceval.c:3425
#16 0x080c6719 in PyEval_EvalFrame (f=0x816dd7c) at
Python/ceval.c:2026
#17 0x080c8fdd in PyEval_EvalCodeEx (co=0xb7cf1ef0,
globals=0xb7d62e94, locals=0xb7d62e94, args=0x0, argcount=0,
kws=0x0, 
    kwcount=0, defs=0x0, defcount=0, closure=0x0) at
Python/ceval.c:2736
#18 0x080bffb0 in PyEval_EvalCode (co=0xb7cf1ef0,
globals=0xb7d62e94, locals=0xb7d62e94) at Python/ceval.c:490
#19 0x080f361d in run_node (n=0xb7d122d0, filename=0x8123ba3
"<stdin>", globals=0xb7d62e94, locals=0xb7d62e94, 
    flags=0xbffff584) at Python/pythonrun.c:1265
#20 0x080f1f58 in PyRun_InteractiveOneFlags (fp=0xb7e94720,
filename=0x8123ba3 "<stdin>", flags=0xbffff584)
    at Python/pythonrun.c:762
#21 0x080f1c93 in PyRun_InteractiveLoopFlags (fp=0xb7e94720,
filename=0x8123ba3 "<stdin>", flags=0xbffff584)
    at Python/pythonrun.c:695
#22 0x080f1af6 in PyRun_AnyFileExFlags (fp=0xb7e94720,
filename=0x8123ba3 "<stdin>", closeit=0, flags=0xbffff584)
    at Python/pythonrun.c:658
#23 0x08055e45 in Py_Main (argc=1, argv=0xbffff634) at
Modules/main.c:484
#24 0x08055366 in main (argc=1, argv=0xbffff634) at
Modules/python.c:23

The value object in err_input() (in the E_DECODE case) seems
to be bogus (it gives me a refcount of -606348325).