[Bug ada/57849] New: With Convention => C causes Bug box with -gnat2012

[prosfilaes at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57849

            Bug ID: 57849
           Summary: With Convention => C causes Bug box with -gnat2012
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
          Assignee: unassigned at gcc dot gnu.org
          Reporter: prosfilaes at gmail dot com

$ gcc -gnatd.n -gnat2012 -c -Wall g.adb
/home/prosfilaes/bin/gcc-4.8.0/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/adainclude/system.ads
g.adb
+===========================GNAT BUG DETECTED==============================+
| 4.8.0 (x86_64-unknown-linux-gnu) GCC error:                              |
| in gnat_to_gnu_entity, at ada/gcc-interface/decl.c:336                   |
| Error detected at g.adb:3:48                                             |
| Please submit a bug report; see http://gcc.gnu.org/bugs.html.            |
| Use a subject line meaningful to you and us to track the bug.            |
| Include the entire contents of this bug box in the report.               |
| Include the exact gcc or gnatmake command that you entered.              |
| Also include sources listed below in gnatchop format                     |
| (concatenated together with no headers between files).                   |
+==========================================================================+

Please include these source files with error report
Note that list may not be accurate in some cases,
so please double check that the problem can still
be reproduced with the set of files listed.
Consider also -gnatd.n switch (see debug.adb).

g.adb

g.adb:3:04: warning: constant "AR" is not referenced
compilation abandoned

$ cat g.adb 
procedure g is
   type Glp_Matrix_Values_Array is array (Natural range <>) of Long_Float;
   AR : constant Glp_Matrix_Values_Array (0 .. 12) := (others => 1.0)
     with Convention => C;
begin
        null;
end g;