Bug#666106: kfreebsd-i386: Exceptions with tracebacks in task rendezvous cause STORAGE_ERROR

[Nicolas Boulenguez <nicolas@debian.org>]

Package: gnat-4.6
Followup-For: Bug #666106
Control: reassign -1 gnat-4.8 4.8.2-8

Same symptoms on fischer.debian.org (s-intman.adb:139), but signal is
named as SIGSEGV.  Backtrace:
0x2834bd7b in __gnat_backtrace ()
   from /usr/lib/i386-kfreebsd-gnu/libgnat-4.8.so.1
(gdb) backtrace
#0  0x2834bd7b in __gnat_backtrace ()
   from /usr/lib/i386-kfreebsd-gnu/libgnat-4.8.so.1
#1  0x28313c1e in system__traceback__call_chain ()
   from /usr/lib/i386-kfreebsd-gnu/libgnat-4.8.so.1
#2  0x281a5a32 in ada__exceptions__call_chain ()
   from /usr/lib/i386-kfreebsd-gnu/libgnat-4.8.so.1
#3  0x281a5f1f in ada__exceptions__complete_occurrence ()
   from /usr/lib/i386-kfreebsd-gnu/libgnat-4.8.so.1
#4  0x281a5f4b in ada__exceptions__complete_and_propagate_occurrence ()
   from /usr/lib/i386-kfreebsd-gnu/libgnat-4.8.so.1
#5  0x281a6531 in __gnat_raise_with_msg ()
   from /usr/lib/i386-kfreebsd-gnu/libgnat-4.8.so.1
#6  0x28092c52 in system__tasking__entry_calls__check_exception ()
   from /usr/lib/i386-kfreebsd-gnu/libgnarl-4.8.so.1
#7  0x2809914c in system__tasking__rendezvous__call_synchronous ()
   from /usr/lib/i386-kfreebsd-gnu/libgnarl-4.8.so.1
#8  0x280991e8 in system__tasking__rendezvous__call_simple ()
   from /usr/lib/i386-kfreebsd-gnu/libgnarl-4.8.so.1
#9  0x0804a1f5 in _ada_main ()