[Octave-bug-tracker] [bug #30478] prelinking causes octave to crash

[Jan Kratochvil]

Follow-up Comment #5, bug #30478 (project octave):

From
https://bugzilla.redhat.com/show_bug.cgi?id=524493#c1
https://bugzilla.redhat.com/show_bug.cgi?id=524493#c5
backtraces it crashes on:
   0x000000000046920e <+158>:   addl   $0x1,0xc(%rax)
liboctave/dim-vector.h:176
  explicit dim_vector (void)
    : rep (nil_rep ()) { rep->count++; }
                         ^^^^^^^^^^^^^

This is dereferencing symbol `dim_vector::nil_rep() const::nr':
liboctave/dim-vector.h:168
  dim_vector_rep *nil_rep (void) const
  {
    static dim_vector_rep *nr = new dim_vector_rep ();

    return nr;
  }

Unfortunately without a reproducer and limited info the backtrace I cannot
say more.  But that `static' variable `nr' seems a bit needlessly risky there.
 (It could be also gcc-overoptimized.)

HG change 9507 already changed this code due to other reasons so this bug may
no longer be present there.  (octave-3.2.4-2.fc13 still does not contain this
change, though.)


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