[Bug ada/51624] New: [4.6/4.7 regression] Assert_Failure atree.adb:808 on IRIX 6.5

[ro at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51624

             Bug #: 51624
           Summary: [4.6/4.7 regression] Assert_Failure atree.adb:808 on
                    IRIX 6.5
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: r...@gcc.gnu.org
                CC: char...@gcc.gnu.org, ebotca...@gcc.gnu.org
              Host: mips-sgi-irix6.5
            Target: mips-sgi-irix6.5
             Build: mips-sgi-irix6.5


Between 20111209 (r182157) and 20111216 (r182397), Ada bootstrap started to
fail
on IRIX 6.5 in stage 3:

+===========================GNAT BUG DETECTED==============================+
| 4.6.3 20111216 (prerelease) [gcc-4_6-branch revision 182397]
(mips-sgi-irix6.5) |
| Assert_Failure atree.adb:794                                             |
| Error detected at ali.adb:2008:45                                  

When I apply the patch for PR bootstrap/50686 just suggested, I observe a
similar
ICE on mainline, too:

+===========================GNAT BUG DETECTED==============================+
| 4.7.0 20111216 (experimental) [trunk revision 182408] (mips-sgi-irix6.5) |
| Assert_Failure atree.adb:808                                             |
| Error detected at a-exexda.adb:635:15           

This suggests that a recent patch that has also been backported to the 4.6
branch
is the culprit.

  Rainer