Description:
When I try to build a library using gnatmake with a .gpr file, it always ends with the following error:
> End of compilation
> Exception name: SYSTEM.ASSERTIONS.ASSERT_FAILURE
> Message: namet.adb:655
>
> gnatmake: INTERNAL ERROR. Please report

This does not seems to be an upstream bug (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59853).

Additional info:
* package version(s)
gcc-multilib 4.8.2-7
gcc-ada-multilib 4.8.2-7

I got the same problem with gcc-ada 4.8.2-7.


* config and/or log files etc.
# Command line

% gnatmake -v -Phello

Parsing project file "hello".
8 lines: No errors

Parsing of project file "hello" is finished.
Adding source directory "/home/grim7reaper/Documents/Developpements/Ada/simple_lib/src/".
Adding object directory "/home/grim7reaper/Documents/Developpements/Ada/simple_lib/obj/".
Adding "hello.adb" as if on the command line

GNATMAKE 4.8.2 20131219 (prerelease)
Copyright (C) 1995-2013, Free Software Foundation, Inc.
Changing to object directory of "Hello": "/home/grim7reaper/Documents/Developpements/Ada/simple_lib/obj/"
Library file does not exist for project "hello"
Main source file: "hello.adb".
Created configuration file "/home/grim7reaper/Documents/Developpements/Ada/simple_lib/obj/GNAT-TEMP-000001.TMP"
"hello.ali" being checked ...
-> "hello.ali" missing.
gcc -c -I- -gnatA /home/grim7reaper/Documents/Developpements/Ada/simple_lib/src/hello.adb
End of compilation
Exception name: SYSTEM.ASSERTIONS.ASSERT_FAILURE
Message: namet.adb:655

gnatmake: INTERNAL ERROR. Please report.


Steps to reproduce:
Please find in attachments a minimal set of source files for reproducing the bug:
- unpack the archive
- cd simple_lib
- gnatmake -Phello