[Bug ada/49084] [4.7 regression] bootstrap failure with Ada enabled

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49084

--- Comment #14 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-12-04 21:59:13 UTC ---
> (gdb) call pn(gnat_root)
> N_Compilation_Unit (Node_Id=1707) (source,analyzed)
>  Parent = <empty>
>  Sloc = 9966  a-charac.ads:16:12
>  Context_Items = List (List_Id=-99999988)
>  Unit = N_Package_Declaration (Node_Id=1722)
>  Aux_Decls_Node = N_Compilation_Unit_Aux (Node_Id=1708)
> 
> It seems OK to me on the Ada side. I wonder what makes it trigger the assertion
> gcc_assert (Nkind (gnat_root) == N_Compilation_Unit)
> 
> Maybe the C accessor "Nkind" is not working well for some reason?

Yes, there is something really weird going on at the interface between C and
Ada.
Unfortunately I don't seem to be able to reproduce on Linux.  Could you see
what object code has been generated for the line

gcc_assert (Nkind (gnat_root) == N_Compilation_Unit);

in stage1-gcc/ada/trans.o and prev-gcc/ada/trans.o?