[Bug c/38716] Undocumented __attribute__((optimize)) behaviour when the attribute specifies no optimisation level

["manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38716

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |manu at gcc dot gnu.org

--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Probably a dup of PR63401
>From gcc-bugs-return-471671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Dec 23 21:13:56 2014
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From: "patnel97269-gfortran at yahoo dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/64397] New: memory allocation failed with parenthesis
Date: Tue, 23 Dec 2014 21:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd397

            Bug ID: 64397
           Summary: memory allocation failed with parenthesis
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: patnel97269-gfortran at yahoo dot fr

Hi all,

I want to report a bug which i describe orignially here,
https://gcc.gnu.org/ml/fortran/2014-12/msg00117.html .

The expression (a+b) works well, while ((a)+(b)) triggers a memory allocation
issue. And its works fine, if there is no allocatable components in the type.

Janus Weil worked out a reduce test case below, and can  reproduce the segfault
with various versions of gfortran (4.7, 4.8, 4.9 and trunk) :

module num

  type :: my_integer
    real, allocatable :: x(:)
  contains
    procedure :: ass
    generic :: assignment(=) => ass
  end type

contains

  subroutine ass(a,b)
    class(my_integer), intent(out) :: a
    class(my_integer), intent(in) :: b
    select type (b)
    type is (my_integer)
      allocate(a%x(size(b%x)))
      a%x = b%x
    end select
    print *,'called ass'
  end subroutine

end module

program main
  use num
  type(my_integer) :: a, c
  a=my_integer([1])
  write (*,*) "C: ",c%x
  c = a
  write (*,*) "C: ",c%x
  c = (a)
  write (*,*) "C: ",c%x
end

Thanks
Pat.