> > (1) Do you or do you not actually have the same problem when
> > you build the same code under Linux? You don't say above.
>
> I hadn't had the chance to try yet, but I have now. I can't get it to
> give any error in linux at all. All the tests pass, in and out of gdb
> mode. I tried several times.
Turns out I was testing the wrong branch. I can reproduce the problem
in linux, and here I actually get a useful-ish backtrace, since gdb
has enough information. The relevant line in my .pyx file is a simple
sage_free call. It looks like an array overflow problem or something.
I guess this is all good news, since it seems as if gdb in os x 10.5
could get me this information too if the build had finished.
(gdb) r
Starting program: /home/hd/sage/local/bin/
python .doctest_binary_code.py
[Thread debugging using libthread_db enabled]
[New Thread -1209636192 (LWP 5346)]
*** glibc detected *** free(): invalid next size (fast): 0x087836d0
***
Program received signal SIGABRT, Aborted.
[Switching to Thread -1209636192 (LWP 5346)]
0xffffe410 in __kernel_vsyscall ()
(gdb) bt
#0 0xffffe410 in __kernel_vsyscall ()
#1 0xb7e8f9a1 in raise () from /lib/tls/i686/cmov/libc.so.6
#2 0xb7e912b9 in abort () from /lib/tls/i686/cmov/libc.so.6
#3 0xb7ec387a in __fsetlocking () from /lib/tls/i686/cmov/libc.so.6
#4 0xb7ec9fd4 in malloc_usable_size () from /lib/tls/i686/cmov/
libc.so.6
#5 0xb7eca34a in free () from /lib/tls/i686/cmov/libc.so.6
#6 0xb427429d in
__pyx_tp_dealloc_4sage_6coding_11binary_code_PartitionStack
(o=0xb4c4c5cc) at sage/coding/binary_code.c:3413
#7 0x0808106b in insertdict (mp=0x6, key=0xb7e498c0, hash=-724865314,
value=0x8137720) at Objects/dictobject.c:412
#8 0x08081486 in PyDict_SetItem (op=0xb7e28824, key=0xb7e498c0,
value=0x8137720) at Objects/dictobject.c:637
#9 0x0808573a in PyObject_GenericSetAttr (obj=0xb7e2605c,
name=0xb7e498c0, value=0x8137720) at Objects/object.c:1427
#10 0x08084e0c in PyObject_SetAttr (v=0xb7e2605c, name=0xb7e498c0,
value=0x8137720) at Objects/object.c:1183
#11 0x08084f7b in PyObject_SetAttrString (v=0xb7e2605c, name=0x811bb0b
"_", w=0x8137720) at Objects/object.c:1097
#12 0x080e8144 in sys_displayhook (self=0x0, o=0xb7de6440) at Python/
sysmodule.c:105
#13 0x0805aa1c in PyObject_Call (func=0x14e2, arg=0x0, kw=0x0) at
Objects/abstract.c:1860
#14 0x080bc8f3 in PyEval_CallObjectWithKeywords (func=0x0,
arg=0xb42a9b6c, kw=0x0) at Python/ceval.c:3433
#15 0x080c23ca in PyEval_EvalFrameEx (f=0x8d43b5c, throwflag=0) at
Python/ceval.c:1530
#16 0x080c420e in PyEval_EvalCodeEx (co=0xb4c3ef50,
globals=0xb429e9bc, locals=0xb429e9bc, args=0x0, argcount=0, kws=0x0,
kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:
2831
#17 0x080c2b66 in PyEval_EvalFrameEx (f=0x877e1fc, throwflag=0) at
Python/ceval.c:494
#18 0x080c420e in PyEval_EvalCodeEx (co=0xb42ed9b0,
globals=0xb42e8b54, locals=0x0, args=0x8d421d0, argcount=4,
kws=0x8d421e0,
kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:
2831
#19 0x080c2367 in PyEval_EvalFrameEx (f=0x8d4207c, throwflag=0) at
Python/ceval.c:3660
#20 0x080c420e in PyEval_EvalCodeEx (co=0xb42edbf0,
globals=0xb42e8b54, locals=0x0, args=0x8c1b3b0, argcount=2,
kws=0x8c1b3b8,
kwcount=0, defs=0xb42ff1c8, defcount=3, closure=0x0) at Python/
ceval.c:2831
#21 0x080c2367 in PyEval_EvalFrameEx (f=0x8c1b244, throwflag=0) at
Python/ceval.c:3660
#22 0x080c420e in PyEval_EvalCodeEx (co=0xb42f1800,
globals=0xb42e8b54, locals=0x0, args=0x816b260, argcount=1,
kws=0x816b264,
kwcount=3, defs=0xb42f4278, defcount=9, closure=0x0) at Python/
ceval.c:2831
#23 0x080c2367 in PyEval_EvalFrameEx (f=0x816b124, throwflag=0) at
Python/ceval.c:3660
#24 0x080c420e in PyEval_EvalCodeEx (co=0xb7e01188,
globals=0xb7e3eacc, locals=0xb7e3eacc, args=0x0, argcount=0, kws=0x0,
kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:
2831
#25 0x080c4396 in PyEval_EvalCode (co=0x0, globals=0x0, locals=0x0) at
Python/ceval.c:494
#26 0x080e2c6e in PyRun_FileExFlags (fp=0x8161008, filename=0xbf8f739a
".doctest_binary_code.py", start=0, globals=0x0, locals=0x0,
closeit=1, flags=0xbf8f6b88) at Python/pythonrun.c:1271
#27 0x080e2fa9 in PyRun_SimpleFileExFlags (fp=<value optimized out>,
filename=0xbf8f739a ".doctest_binary_code.py", closeit=1,
flags=0xbf8f6b88) at Python/pythonrun.c:877
#28 0x08056d0f in Py_Main (argc=1, argv=0xbf8f6c24) at Modules/main.c:
523
#29 0xb7e7bea2 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.
6
#30 0x080561b1 in _start () at ../sysdeps/i386/elf/start.S:119
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