Re: segfault and onCleanup()

[Ben Abbott]

On Dec 8, 2011, at 11:07 AM, John W. Eaton wrote:

> On  8-Dec-2011, Ben Abbott wrote:
> 
> | With the change above, I still see a segfault.
> | 
> | panic: Segmentation fault: 11 -- stopping myself...
> | attempting to save variables to `octave-core'...
> | terminate called after throwing an instance of 'std::length_error'
> |   what():  basic_string::_S_create
> | panic: attempted clean up apparently failed -- aborting...
> | make[1]: *** [check] Abort trap: 6
> | make: *** [check] Error 2
> | 
> | I tried (naively?) restoring the patches to ov-typeinfo.cc and graphics.cc, 
> but the segfault persists.
> 
> Is there an onCleanup.oct file from a previous build still present?
> 
> jwe

After  (1) deleted everything named onCleanup.*, (2) maintainter-clean, (3) hg 
pull ; hg update -C, and (4) building octave.  I still see a segfault (a bit 
different now).

panic: Segmentation fault: 11 -- stopping myself...
attempting to save variables to `octave-core'...
octave(38952,0x7fff72320960) malloc: *** mmap(size=3458773283022905344) failed 
(error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
panic: attempted clean up apparently failed -- aborting...
make[1]: *** [check] Abort trap: 6
make: *** [check] Error 2

>From gdb ...

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000111f23118
0x00000001001ee9d7 in std::_Rb_tree<std::string, std::pair<std::string const, 
graphics_toolkit>, std::_Select1st<std::pair<std::string const, 
graphics_toolkit> >, std::less<std::string>, 
std::allocator<std::pair<std::string const, graphics_toolkit> > >::_M_erase ()
(gdb) bt
#0  0x00000001001ee9d7 in std::_Rb_tree<std::string, std::pair<std::string 
const, graphics_toolkit>, std::_Select1st<std::pair<std::string const, 
graphics_toolkit> >, std::less<std::string>, 
std::allocator<std::pair<std::string const, graphics_toolkit> > >::_M_erase ()
#1  0x00007fff8526c7c8 in __cxa_finalize ()
#2  0x00007fff8526c652 in exit ()
#3  0x00000001003918ff in clean_up_and_exit ()
#4  0x0000000100392420 in main_loop ()
#5  0x0000000100324fdf in octave_main ()
#6  0x0000000100000f44 in start ()

Ben