Question on inquire(pos=...) for stream access I/O

Hello,

I am using ifort (IFORT) 12.0.0 at our linux server, and I am experiencing a strange behavior with stream access I/O.

A minimal-size sample code would look as follows:

program inq_pos_test

  implicit none

! integer,parameter :: nbuf=2**14-1

  integer,parameter :: nbuf=2**14

  integer :: offset

  character(len=nbuf) :: str

  offset=1

  open(11,file='./input.txt',form='unformatted',access='stream')

  read(11,pos=offset) str(1:nbuf)

  inquire(11,pos=offset)

  write(*,'(a,i8,a,i8)') 'pos after reading ',nbuf,' bytes=',offset

  close(11)

end program inq_pos_test

where './input.txt' is a 2MB ascii file. Definately I would expect the final value of offset to be (nbuf+1). This is true when nbuf = 2**14 - 1 (= 16383):

pos after reading    16383 bytes=   16384

However, it returns a strange value if nbuf = 2**14 (= 16384):

pos after reading    16384 bytes=    8193

where 8193 = 2**13 + 1. Seems like offset is always 8193 for any values of nbuf >= 2**14.

First of all, I would like to know whether this is our system-specific problem or not. Could anyone check whether this could be reproduced?

Thanks in advance.

ps. gfortran seems to work as expected for any values of nbuf.