[Bug fortran/25829] [F03] Asynchronous IO support
tkoenig at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Mon Oct 2 17:39:00 GMT 2017
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25829
--- Comment #28 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Nicolas Koenig from comment #27)
> program main
> implicit none
> open (10, file='foo.dat', asynchronous='yes')
> call s()
> close(10)
> contains
> subroutine s()
> integer, dimension (3)::i !presumably on the stack
> i = [0, 1]
> write(10,*) i
> !Now the stack frame is dropped and the pointer that previously
> !pointed to the array now points to nowhere, but it is still enqueued
> end subroutine
> end program
This program is illegal (J3/09-007r3, 9.6.4.1, paragraph 4),
so you do not have to do anything about it.
An interesting case is mixing of synchronous and
asynchronous I/O for the same unit, which is permitted.
I think this is like an implicit WAIT, same as a BACKSPACE,
FLUSH, ...
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