The following program (also attached) reads to eof, backspace, reads (eof
detected), backspace, and reads again. The last read gets the last line with
gfortran 4.5 (tested: r148116) but eof with gfortran <= 4.4, g95, g77 and Sun
f95.
>From reading comp.lang.fortran I know that EOF/BACKSPACE interaction can be
problematic but I'd still hope this would work to be consistent with the other
compilers.
PROGRAM TEST
IMPLICIT NONE
CHARACTER(LEN=5) :: STR
OPEN(2,FILE='fort.2',ACCESS='sequential')
WRITE(2,'(A)')'HELLO'
REWIND(2)
DO
READ(2,'(A)',END=1) STR
PRINT *,STR
ENDDO
1 BACKSPACE 2
!the file pointer is now at EOF
READ(2,*,END=2) STR
PRINT *,'error1: not at eof',str
STOP
2 BACKSPACE 2
!the file pointer is now at EOF
READ(2,'(A)',END=3) STR
PRINT *,'error2: not at eof'
STOP
3 PRINT *,'correct'
END
--
Summary: 4.5 regression: changed BACKSPACE behaviour at end of
file.
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libfortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bartoldeman at users dot sourceforge dot net
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40334
