Results and status of internal read are wrong if -malign-double
option is specified. Seen on (32 bit)
SLC4 gfortran 4.3.3 (i686-pc-linux-gnu),
Ubuntu9 gfortran 4.4.1 (Ubuntu 4.4.1-4ubuntu9),
rhel6 beta (4.4.3-1.el6.i386).
No problem on g77 and gfortran (4.1.2-44.EL4_8.1.i386) on SLC4,
gfortran (4.1.2-48.el5.i386) on slc5.
Under Ubuntu9 gfortran 4.4.1:
% gfortran -malign-double ttest.f && ./a.out
Segmentation fault
Under SLC4 gfortran 4.3.3:
% gfortran -malign-double ttest.f && ./a.out
Bad input 1 iostat -1
ival = 4685168
------ ttest.f ------
program ttest
implicit none
integer ival, ierr
character*1 str
str = "1"
read(str,*,iostat=ierr) ival
if (ierr.ne.0) then
write(0,*) 'Bad input ',str,' iostat',ierr
endif
write(0,*) 'ival = ', ival
end
------ EOF ------
Regards, Igor
--
Summary: Segfault on internal read with -malign-double
Product: gcc
Version: 4.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: Igor dot Katchaev at cern dot ch
GCC build triplet: gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu9)
GCC host triplet: Linux pcbecn 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12
05:23:0
GCC target triplet: i486-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44027
