[Bug fortran/55174] [4.6 Regression] Segmentation fault with bad array reference

["harper at msor dot vuw.ac.nz" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55174

--- Comment #3 from harper at msor dot vuw.ac.nz 2012-11-04 20:41:10 UTC ---
On Fri, 2 Nov 2012, janus at gcc dot gnu.org wrote:

> Date: Fri, 2 Nov 2012 10:54:50 +0000
> From: janus at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org>
> To: john.harper@vuw.ac.nz
> Subject: [Bug fortran/55174] [4.6 Regression] Segmentation fault with bad
>     array reference
> Resent-Date: Fri, 2 Nov 2012 10:55:07 +0000
> Resent-From: <john.harper@vuw.ac.nz>
> 
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55174
>
> janus at gcc dot gnu.org changed:
>
>           What    |Removed                     |Added
> ----------------------------------------------------------------------------
>           Keywords|                            |ice-on-invalid-code
>             Status|UNCONFIRMED                 |NEW
>   Last reconfirmed|                            |2012-11-02
>                 CC|                            |janus at gcc dot gnu.org
>            Summary|internal compiler error:    |[4.6 Regression]
>                   |Segmentation fault with bad |Segmentation fault with bad
>                   |array reference             |array reference
>     Ever Confirmed|0                           |1
>
> --- Comment #2 from janus at gcc dot gnu.org 2012-11-02 10:54:50 UTC ---
> (In reply to comment #1)
>> It looks like it has been fixed on trunk (aka 4.8.0).
>
> For me it also works with:
>
> gcc version 4.7.2 20120920 [gcc-4_7-branch revision 191568] (SUSE Linux)
>
> (while it fails with 4.7.0 and 4.6.0).
>
> Note: The 4.6 branch is still maintained, so we should consider fixing it
> there.
>
> -- 
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I have just tried gfortran 4.7.1 (x86_64-unknown-linux-gnu) and it
gave the internal compiler error with my program. So it seems that
4.7.0 and 4.7.1 both have the bug and 4.7.2 does not. Evidence:

miro[~]$ cat trybadstar.f90
implicit none
integer:: array(2)=(/42,666/)
print *, size(array(*))
end
miro[~]$ gf7 -v trybadstar.f90
Driving: /home/harperj1/gcc47/gf/bin/gfortran -v trybadstar.f90 -l 
gfortran -l m -shared-libgcc
Using built-in specs.
COLLECT_GCC=/home/harperj1/gcc47/gf/bin/gfortran
COLLECT_LTO_WRAPPER=/home/harperj1/gcc47/gf/libexec/gcc/x86_64-unknown-linux-gnu/4.7.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/harperj1/gcc47/gcc-4.7.1/configure 
--prefix=/home/harperj1/gcc47/gf --enable-languages=c,fortran 
--disable-libada --with-local-prefix=/home/harperj1/gcc47 
--with-gmp=/home/harperj1/gcc47
Thread model: posix
gcc version 4.7.1 (GCC)
COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
  /home/harperj1/gcc47/gf/libexec/gcc/x86_64-unknown-linux-gnu/4.7.1/f951 
trybadstar.f90 -quiet -dumpbase trybadstar.f90 -mtune=generic 
-march=x86-64 -auxbase trybadstar -version -fintrinsic-modules-path 
/home/harperj1/gcc47/gf/lib/gcc/x86_64-unknown-linux-gnu/4.7.1/finclude -o 
/tmp/ccFXH0I1.s
GNU Fortran (GCC) version 4.7.1 (x86_64-unknown-linux-gnu)
         compiled by GNU C version 4.7.1, GMP version 4.3.1, MPFR version 
2.4.1, MPC version 0.8
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran (GCC) version 4.7.1 (x86_64-unknown-linux-gnu)
         compiled by GNU C version 4.7.1, GMP version 4.3.1, MPFR version 
2.4.1, MPC version 0.8
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
f951: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
miro[~]$

-- John Harper, School of Mathematics Statistics and Operations Research
Victoria University, PO Box 600, Wellington 6140, New Zealand
e-mail john.harper@vuw.ac.nz phone (+64)(4)463 5276 fax (+64)(4)463 5045