[Bug ada/79542] New: [7.0 regression] GNAT bug box

[reznikmm at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79542

            Bug ID: 79542
           Summary: [7.0 regression] GNAT bug box
           Product: gcc
           Version: 7.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reznikmm at gmail dot com
  Target Milestone: ---

Created attachment 40754
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40754&action=edit
package body

Here is a reproducer for regression in GCC 7.
The regression was found by fedora project while recompiling packages
with new compiler. gcc 6, gcc 5 works fine with it.

gcc version 7.0.1 20170212 (experimental) (GCC)
Target: x86_64-pc-linux-gnu
Configured with: /work/reznik/gcc/gcc-7-20170212/configure
--enable-languages=ada,c,c++ --prefix=/work/reznik/gcc/install
--disable-multilib

Command line:
gcc -O2 -c -g finite_automatons.adb

Output:
+===========================GNAT BUG DETECTED==============================+
| 7.0.1 20170212 (experimental) (x86_64-pc-linux-gnu) GCC error:           |
| in add_gnat_descriptive_type_attribute, at dwarf2out.c:19511             |
| Error detected around finite_automatons.adb:34:8                         |
| Please submit a bug report; see https://gcc.gnu.org/bugs/ .              |
| 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 command that you entered.                              |
| Also include sources listed below.                                       |
+==========================================================================+

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).

finite_automatons.adb
finite_automatons.ads


raised TYPES.UNRECOVERABLE_ERROR : comperr.adb:406