[Bug fortran/82018] [6/7/8 Regression] missing warnings with -Wconversion

["tkoenig at netcologne dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82018

--- Comment #3 from tkoenig at netcologne dot de <tkoenig at netcologne dot de> ---
Am 29.08.2017 um 10:35 schrieb janus at gcc dot gnu.org:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82018
> 
> --- Comment #2 from janus at gcc dot gnu.org ---
> (In reply to janus from comment #0)
>>
>>   i8 = 2.0
>>       1
>> Warning: Possible change of value in conversion from REAL(4) to INTEGER(8)
>> at (1) [-Wconversion]
> 
> Note that if I change 2.0 to 2.1 here, I do get a warning also with gfortran 6.
> It seems this was an intended change of behavior.
> 
> However I would argue that the warning was useful indeed. In a well-written
> code one should write "i8 = 2" instead of "i8 = 2.0".
> 
> Maybe one could re-enable such warnings at least with -Wextra?

The warning is given with -Wconversion-extra.

We could enable -Wconversion-extra with -Wextra.