!{ dg-do run }
! PR26464 File I/O error related to buffering and BACKSPACE
! Test case derived from case by Dale Ranta.
! Submitted by Jerry DeLisle <jvdelisle@gcc.gnu.org>
program test
integer,parameter :: datasize = 5000
dimension idata(datasize)
open (11, status="scratch", form="unformatted")
idata(1) = -1
idata(datasize) = -2
write(11)idata
idata(1) = -2
idata(datasize) = -3
write(11)idata
idata(1) = -3
idata(datasize) = -4
write(11)idata
backspace 11
backspace 11
idata(1) = -2
idata(datasize) = -3
write(11)idata
read(11,end= 1003 )idata
call abort()
1003 continue
backspace 11
backspace 11
read(11,end= 1004 )idata
if(idata(1).ne.-2 .or.idata(datasize).ne.-3) call abort()
stop
1004 continue
end