[Bug fortran/54070] Wrong code with allocatable deferred-length (array) function results

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54070

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2014-01-07
     Ever confirmed|0                           |1

--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Dominique mentions that the failure of the array test case seems to be 
> a regression between Rev. 188654 and 188694. Well, there was only one 
> commit during that time (Rev. 188692, 2012-06-16): The one for 
> PR 53642 / PR45170: "Ensure that the RHS string length is evaluated 
> before the deferred-length LHS is reallocated."

I cannot reproduce that any longer.

> Using my (older) build of Rev. 187316 (2012-05-09), the array test case 
> fails with the same error as today, but the scalar example of comment 0 
> works. (The dump looks fine and identical to today's trunk plus patch 
> of comment 2.)
>
> Thus, the scalar version got broken between 187316 and 188654; the array 
> version got repaired after 187316 and got broken again before 188694 
> (i.e. with 188692).

The second and third tests in comment 0 give respectively

function f(a)
1
Error: CHARACTER(*) function 'f' at (1) cannot be array-valued

and

  function return_string(argument)
  1
Error: CHARACTER(*) function 'return_string' at (1) cannot be array-valued
pr54070_2.f90:3.2:

  function return_string(argument)
  1
Error: CHARACTER(*) function 'return_string' at (1) cannot be array-valued

when compiled with 4.7.3 or 4.7.4 (r206161).

Should I mark this pr as a 4.8/4.9 regression?