[Bug ada/51035] New: GNAT bug detected error reported when compiling Ada code

["aravindvijayan224185 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51035

             Bug #: 51035
           Summary: GNAT bug detected error reported when compiling Ada
                    code
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: aravindvijayan224185@gmail.com


Created attachment 25754
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25754
The source code

When compiling a test program written in Ada using 4.6.1 20110908 (Red Hat
4.6.1-9) (i686-redhat-linux-gnu) (package gcc-gnat-4.6.1-9.fc15.i686), I see
the following error message:

----------------------------------------------------------------------------

[aravind@localhost ada]$ gnatmake  test.adb 
gcc -c test.adb
+===========================GNAT BUG DETECTED==============================+
| 4.6.1 20110908 (Red Hat 4.6.1-9) (i686-redhat-linux-gnu) Assert_Failure
sinfo.adb:2547|
| Error detected at test.adb:5:4                                           |
| 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).

test.adb

test.adb:5:39: extra ")" ignored
compilation abandoned
gnatmake: "test.adb" compilation error



-------------------------------------------------------------------
The ada program text consists of the following lines:

--begin program
with Ada.Text_IO;

procedure Test is
   subtype X is Integer range (1 .. 25);
   Y: Integer range X'First .. X'Last := X'First;
begin
   Ada.Text_IO.Put("Hello World");
end Test;

-- end program


The error lies with the line which reads:

   subtype X is Integer range (1 .. 25);

The brackets around the 1 .. 25 are wrong. Once removed, the error goes away.

However, the compiler should report a nice error message and not report that a
bug in the compiler has been found.

------------------------------------------------------------------

here is the "gcc -v" output:

[aravind@localhost ada]$ gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/i686-redhat-linux/4.6.1/lto-wrapper
Target: i686-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-gnu-unique-object
--enable-linker-build-id
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin
--enable-java-awt=gtk --disable-dssi
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-ppl --with-cloog --with-tune=generic --with-arch=i686
--build=i686-redhat-linux
Thread model: posix
gcc version 4.6.1 20110908 (Red Hat 4.6.1-9) (GCC) 

--------------------------------------------------------------------------

expected behavior:

Just a compiler error due to syntax error

actual behavior:

A bug box even that is only a syntax error

---------------------------------------------------------------------------