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Date: Tue, 01 Jul 2008 05:22:00 -0000
Subject: [Bug fortran/36683]  New: -fbounds-check failure for allocated array and spread
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From: "terry at chem dot gu dot se" <gcc-bugzilla@gcc.gnu.org>
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Unconformable array operations are not being picked up in the following:

[tjf@rscpc28 Stoopid]$ cat badness.f90 
program fred
implicit none
real,dimension(:,:),allocatable::A
real,dimension(5)::v
allocate(A(5,5))
A=5
v=5
A=A/spread(v,2,3)
write(*,*)A(1,:)
write(*,*)A(2,:)
write(*,*)A(3,:)
write(*,*)A(4,:)
write(*,*)A(5,:)
end
[tjf@rscpc28 Stoopid]$ gfortran -Wall -O0 -W -Wtabs -g -fbounds-check -o
badness badness.f90
[tjf@rscpc28 Stoopid]$ ./badness 
  1.00000000      1.00000000      1.00000000       5.0000000       5.0000000    
  1.00000000      1.00000000      1.00000000       5.0000000       5.0000000    
  1.00000000      1.00000000      1.00000000       5.0000000       5.0000000    
  1.00000000      1.00000000      1.00000000       5.0000000       5.0000000    
  1.00000000      1.00000000      1.00000000       5.0000000       5.0000000    
[tjf@rscpc28 Stoopid]$ gfortran -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.3-20080522/configure --disable-multilib
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 4.3.1 20080522 (prerelease) (GCC) 


Making the spread array too big [spread(v,2,13)] is not detected either.  My
quick attempts to do both in a single code caused glibc to freak out with
"double free or corruption" detection.


-- 
           Summary: -fbounds-check failure for allocated array and spread
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: terry at chem dot gu dot se
  GCC host triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36683