[Python-Dev] free(): invalid pointer (original) (raw)

Ralf Schmitt ralf at brainbot.com
Tue Aug 8 12:08:11 CEST 2006

Hi all,

I've got another error porting our apps. It's a django app and stops with (when pressing CTRL-C):

*** glibc detected *** free(): invalid pointer: 0xb684c650 ***

with MALLOC_CHECK=1 and gdb I get the following backtrace:

Program received signal SIGINT, Interrupt. [Switching to Thread -1209690432 (LWP 10036)] 0xffffe410 in __kernel_vsyscall () (gdb) *** glibc detected *** free(): invalid pointer: 0xb66a22a8 ***

(gdb) bt #0 0xffffe410 in __kernel_vsyscall () #1 0xb7fbd463 in __waitpid_nocancel () from /lib/tls/i686/cmov/libpthread.so.0 #2 0x080ed524 in posix_waitpid (self=0x0, args=0xfffffe00) at ./Modules/posixmodule.c:5502 #3 0x080bec34 in PyEval_EvalFrameEx (f=0x825a3b4, throwflag=0) at Python/ceval.c:3565 #4 0x080be459 in PyEval_EvalFrameEx (f=0x81bd60c, throwflag=0) at Python/ceval.c:3650 #5 0x080be459 in PyEval_EvalFrameEx (f=0x82354f4, throwflag=0) at Python/ceval.c:3650 #6 0x080be459 in PyEval_EvalFrameEx (f=0x81dbb94, throwflag=0) at Python/ceval.c:3650 #7 0x080bff75 in PyEval_EvalCodeEx (co=0xb7c91c38, globals=0xb7a3713c, locals=0x0, args=0x822fcd0, argcount=1, kws=0x822fcd4, kwcount=0, defs=0xb7a33058, defcount=2, closure=0x0) at Python/ceval.c:2832 #8 0x080bd771 in PyEval_EvalFrameEx (f=0x822fb6c, throwflag=0) at Python/ceval.c:3661 #9 0x080bff75 in PyEval_EvalCodeEx (co=0xb7dfeba8, globals=0xb7dfd714, locals=0x0, args=0x820165c, argcount=2, kws=0x8201664, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:2832 #10 0x080bd771 in PyEval_EvalFrameEx (f=0x82014cc, throwflag=0) at Python/ceval.c:3661 #11 0x080bff75 in PyEval_EvalCodeEx (co=0xb7dfede8, globals=0xb7dfd714, locals=0x0, args=0x81ec784, argcount=1, kws=0x81ec788, kwcount=0, defs=0xb7cfcdb8, defcount=1, closure=0x0) at Python/ceval.c:2832 #12 0x080bd771 in PyEval_EvalFrameEx (f=0x81ec634, throwflag=0) at Python/ceval.c:3661 #13 0x080be459 in PyEval_EvalFrameEx (f=0x81ae054, throwflag=0) at Python/ceval.c:3650 #14 0x080bff75 in PyEval_EvalCodeEx (co=0xb7de2770, globals=0xb7e319bc, locals=0xb7e319bc, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:2832 ---Type to continue, or q to quit--- #15 0x080c00f6 in PyEval_EvalCode (co=0xfffffe00, globals=0xfffffe00, locals=0xfffffe00) at Python/ceval.c:494 #16 0x080de682 in PyRun_FileExFlags (fp=0x815f008, filename=0xbfdf18b1 "manage.py", start=-512, globals=0xfffffe00, locals=0xfffffe00, closeit=1, flags=0xbfdefbb8) at Python/pythonrun.c:1255 #17 0x080de9f3 in PyRun_SimpleFileExFlags (fp=, filename=0xbfdf18b1 "manage.py", closeit=1, flags=0xbfdefbb8) at Python/pythonrun.c:861 #18 0x08056a69 in Py_Main (argc=2, argv=0xbfdefc54) at Modules/main.c:496 #19 0xb7e6fea2 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6 #20 0x08055fa1 in _start () at ../sysdeps/i386/elf/start.S:119

I'm using Python 2.5b3 (trunk:51066M, Aug 3 2006, 16:55:04).

Sorry for not using the bugtracker (sf sucks). Did you guys already settle on a new one?

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