http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30162
--- Comment #44 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2013-02-18
18:44:02 UTC ---
If unformatted sequential ever worked, it was by chance.
Look at this piece of code:
/* Seek to the head and overwrite the bogus length with the real
length. */
if (unlikely (sseek (dtp->u.p.current_unit->s, - m - 2 * record_marker,
SEEK_CUR) < 0))
goto io_error;
This works if it happens within a buffer, but you cannot rely on that.
I would therefore suggest to resolve this PR by issuing a well-defined
error if we encounter a pipe on opening.
I'll prepare a patch.
