-fpack-struct causes SEGV

[jean-paul roumian <jp roumian mobileway com>]

Hello,

I tried the well-known "orbit-docs" examples (echo server, calculator)
Everything works ok, but if I compile with -fpack-struct option (I did
this because I work on sotfware that need this 8-(), without changing
anything else, the programs
core dump at startup, with:

0x804b90f in CORBAMailServer_getSMTPCounter (_obj=0x80595f8, i2=1,
ev=0xbffff9e8) at calculator-stubs.c:25
25    _cnx = ORBit_object_get_connection(_obj);
(gdb) print *_cnx
Cannot access memory at address 0x4c.
(gdb) print *_obj
$1 = {parent = {interface = 0x400742a8, is_pseudo_object = 0 '\000',
refs = 16777216}, orb = 0x40000000, connection = 0x80582,
  object_id = 0x68000000 <Address 0x68000000 out of bounds>,
profile_list = 0x50080596, forward_locations = 0x80591,   active_profile
= 0x0, vepv = 0x0, servant = 0x0}


This seems very strange to me.
Why it is so sensible to this option, and is it a bug ?