the following program
INTEGER*8 :: N
INTEGER, DIMENSION(:), ALLOCATABLE :: data
N=2_8**32
write(6,*) N
ALLOCATE(data(N))
write(6,*) SIZE(data,1)
END
prints
4294967296
0
It would be useful if a check for overflow of size could be added to e.g.
-fbounds-check (a rather natural place I would say) so that this kind of
undefined behavior could be detected at run time. I'm aware of the fact that
this is fixed more fundamentally with F2003.
--
Summary: add a correctness check for the size intrinsic to -
fbounds-check
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jv244 at cam dot ac dot uk
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39772
