[Bug bootstrap/67672] New: [6 regression] Ada "Storage_Error stack overflow or erroneous memory access" error breaks sparc-linux bootstrap

["mikpelinux at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67672

            Bug ID: 67672
           Summary: [6 regression] Ada "Storage_Error stack overflow or
                    erroneous memory access" error breaks sparc-linux
                    bootstrap
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mikpelinux at gmail dot com
  Target Milestone: ---

Attempting to bootstrap gcc-6-20150920 (r227952) on sparc-linux (sparc64-linux
with options to default to -m32) fails with:

/mnt/scratch/objdir6/./prev-gcc/xgcc -B/mnt/scratch/objdir6/./prev-gcc/
-B/mnt/scratch/install6/sparc-unknown-linux/bin/
-B/mnt/scratch/install6/sparc-unknown-linux/bin/
-B/mnt/scratch/install6/sparc-unknown-linux/lib/ -isystem
/mnt/scratch/install6/sparc-unknown-linux/include -isystem
/mnt/scratch/install6/sparc-unknown-linux/sys-include    -c -g -O2  -gnatpg  -W
-Wall -nostdinc -I- -I. -Iada/generated -Iada
-I/mnt/scratch/gcc-6-20150920/gcc/ada
-I/mnt/scratch/gcc-6-20150920/gcc/ada/gcc-interface
/mnt/scratch/gcc-6-20150920/gcc/ada/checks.adb -o ada/checks.o
+===========================GNAT BUG DETECTED==============================+
| 6.0.0 20150920 (experimental) (sparc-unknown-linux) Storage_Error stack
overflow or erroneous memory access|
| Error detected at checks.adb:3061:16                                     |
| 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 command that you entered.                              |
| Also include sources listed below.                                       |
+==========================================================================+

(long list of files omitted)

compilation abandoned
make[3]: *** [ada/checks.o] Error 1
make[3]: Leaving directory `/mnt/scratch/objdir6/gcc'
make[2]: *** [all-stage3-gcc] Error 2
make[2]: Leaving directory `/mnt/scratch/objdir6'
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory `/mnt/scratch/objdir6'
make: *** [bootstrap] Error 2

gcc-6-20150809 bootstrapped fine, later snapshots failed due to PR67475.

Configuration options:
/mnt/scratch/gcc-6-20150920/configure --prefix=/mnt/scratch/install6
--with-gmp=/home/mikpe/pkgs/linux-sparc64/gmp-6.0.0
--with-mpfr=/home/mikpe/pkgs/linux-sparc64/mpfr-3.1.3
--with-mpc=/home/mikpe/pkgs/linux-sparc64/mpc-1.0.3 --enable-multilib
--disable-plugin --disable-lto --disable-nls --enable-threads=posix
--enable-checking=release --disable-libmudflap --enable-languages=c,ada,c++
--build=sparc-unknown-linux --target=sparc-unknown-linux --with-cpu=ultrasparc
--enable-targets=all