Re: segfault on 'make check'

[John W. Eaton]

On  4-Dec-2011, Rik wrote:

| Here is the backtrace when running under gdb.  This is with tip
| 13989:b4d399c975de.  My gnulib was last updated 11/22/11.
| 
| Program received signal SIGSEGV, Segmentation fault.
| 0x00007fffe6132e3d in ?? ()
| (gdb) bt
| #0  0x00007fffe6132e3d in ?? ()
| #1  0x0000000000767558 in ?? ()
| #2  0x000000000064c3d0 in ?? ()
| #3  0x0000000000024cb0 in ?? ()
| #4  0x000000000065c330 in ?? ()
| #5  0x00007ffff58a9e40 in ?? () from /lib/libc.so.6
| #6  0x0000000000014d50 in ?? ()
| #7  0x0000000000b6ae50 in ?? ()
| #8  0x00007ffff55a5460 in _int_free (av=0x61ca20, p=0x62cfe0) at malloc.c:5017
| #9  0x00000000006123f0 in ?? ()
| #10 0x00007fffffffd260 in ?? ()
| #11 0x0000000000671b90 in ?? ()
| #12 0x00007ffff7d8e8a0 in vtable for octave_value () from
| /home/rik/wip/Projects_Mine/octave-dev/src/.libs/liboctinterp.so.0
| #13 0x000000000062cfe0 in ?? ()
| #14 0x0000000000632538 in ?? ()
| #15 0x00000000006321e8 in ?? ()
| #16 0x000000000061ca20 in ?? ()
| #17 0x00007ffff7d8e8a0 in vtable for octave_value () from
| /home/rik/wip/Projects_Mine/octave-dev/src/.libs/liboctinterp.so.0
| #18 0x00007ffff7d8e8a0 in vtable for octave_value () from
| /home/rik/wip/Projects_Mine/octave-dev/src/.libs/liboctinterp.so.0
| #19 0x00007ffff75b37f3 in octave_value_typeinfo::~octave_value_typeinfo() ()
|    from /home/rik/wip/Projects_Mine/octave-dev/src/.libs/liboctinterp.so.0
| #20 0x00007ffff75b38d6 in octave_value_typeinfo::cleanup_instance() ()
|    from /home/rik/wip/Projects_Mine/octave-dev/src/.libs/liboctinterp.so.0
| #21 0x00007ffff630ef1b in singleton_cleanup_list::~singleton_cleanup_list() ()
|    from /home/rik/wip/Projects_Mine/octave-dev/liboctave/.libs/liboctave.so.0
| #22 0x00007ffff7498e61 in clean_up_and_exit(int) () from
| /home/rik/wip/Projects_Mine/octave-dev/src/.libs/liboctinterp.so.0
| #23 0x00007ffff7443669 in octave_main () from
| /home/rik/wip/Projects_Mine/octave-dev/src/.libs/liboctinterp.so.0
| #24 0x00007ffff5549c4d in __libc_start_main (main=<value optimized out>,
| argc=<value optimized out>,
|     ubp_av=<value optimized out>, init=<value optimized out>, fini=<value
| optimized out>, rtld_fini=<value optimized out>,
|     stack_end=0x7fffffffd208) at libc-start.c:226
| #25 0x0000000000400689 in _start ()

I can't tell what could cause the crash.  Did you compile with -g?  If
not, could you use -g and do this again so we can get more info about
precisely where the crash is happening?  Or could you step through the
singleton_cleanup_list destructor and see whether
octave_value_typeinfo::cleanup_instance is the first cleanup_instance
function that is called, or whether others are called successfully.
The octave_value_typeinfo destructor doesn't even do anything
explicitly.  I don't know what it means that the function called from
there is "vtable".

jwe