https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78351
kargl at gcc dot gnu.org changed:
What |Removed |Added
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CC| |kargl at gcc dot gnu.org
--- Comment #3 from kargl at gcc dot gnu.org ---
(In reply to Dr. Kevin B. Beard from comment #0)
> Created attachment 40038 [details]
> Simple example - comma no longer a format field delimiter - gfortran 4.1.2
> ok, 4.4.7- fails
>
> Here @ NASA we often have strings to read of the form:
>
> #,#,#,#,.....
>
> and on many platforms, gfortran 4.1.2 and (most?) earlier, Intel Fortran
> 16.0.3, g77-3.4.6 and most other FORTRANs, it would treat the "," as a field
> delimiter during a formatted READ - for example (x1.f):
>
> character*80 s
> s= '1,2,3,,,,'
> READ(s,'(2i10)') i,j
> write(6,'(2i10)') i,j
> end
>
> would print " 1 2".
>
> However, 4.4.7 ("gfortran -o x1 x1.f") now (11/2016) fails with
>
> "Fortran runtime error: Bad value during integer read".
>
> I believe it worked with 4.4.7 back in 9/2016 on ScientificLinux-6.4 fine,
> but there have been security patches done since then. It also fails on
> 4.8.5 and 5.3.0 under Red Hat Enterprise Linux Server release 5.11 It would
> be very nice to be able to restore the old behavior.
>
> This may be related to bug#25519.
gfortran's behavior conforms to the standard while your code
does not conform. Perhaps, gfortran should accept a comma as
a field delimiter under -std=legacy, but preference should
be to fixing the wrong code.
10.7.2.2 Integer editing
The Iw and Iw.m edit descriptors indicate that the field to be
edited occupies w positions, except when w is zero. When w is
zero, the processor selects the field width. On input, w shall
not be zero. The specified input/output list item shall be of
type integer. ...
On input, m has no effect.
In the input field for the I edit descriptor, the character string
shall be a signed-digit-string (R409), except for the interpretation
of blanks.
R409 signed-digit-string is [ sign ] digit-string
R410 digit-string
R411 sign is digit [ digit ] ...
is +
or
Perhaps, you want list-directed formatting
10.10 List-directed formatting
10.10.1 General
List-directed input/output allows data editing according to the type
of the list item instead of by a format specification. It also allows
data to be free-field, that is, separated by commas (or semicolons) or
blanks.
