On the Macintosh this program gives a "Segmentation fault" on Linux it gives "Fortran runtime error: Bad address"
dranta:~/tests/gfortran-D] dir% gfortran -o write19 write19.f [dranta:~/tests/gfortran-D] dir% write19 Segmentation fault [dranta:~/tests/gfortran-D] dir% cat write19.f integer data(500) do i = 1,500 data(i)=-1 enddo open(unit=11,status='scratch',form='unformatted') read(11,end= 1000 )data 1000 continue backspace 11 write(11)data read(11,end= 1001 )data 1001 continue backspace 11 backspace 11 write(11)data rewind 11 backspace 11 read(11,end= 1002 )data 1002 continue read(11,end= 1003 )data 1003 continue close(11) end dranta:~/tests/gfortran-D] dir% gfortran --v Using built-in specs. Target: powerpc-apple-darwin8.3.0 Configured with: ../gcc/configure --prefix=/Users/dir/gfortran --enable-languages=c,f95 Thread model: posix gcc version 4.2.0 20060106 (experimental) [dranta:~/tests/gfortran-D] dir% -- Summary: libfortran - Segmentation fault/ Bad Address on unformatted read Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libfortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dir at lanl dot gov http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25697