[Bug fortran/66545] ICE on using undefined parameter/variable values

["gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66545

--- Comment #2 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
FYI, it's astonishing, but this code compiles without an ICE
and prints some reasonable error messages :


$ cat z2_type.f90
program p
   type t
      integer :: n
   end type
   type(t), parameter :: c1 = (t(c1%n))
   type(t), parameter :: c2 = t(c2%n)
   type(t) :: c3 = (t(c3%n))
   type(t) :: c4 = t(c4%n)
   type(t) :: c5
   type(t) :: c6
   c5 = (t(c5%n))
   c6 = t(c6%n)
end


$ gfortran -c z2_type.f90
z2_type.f90:5:33:

    type(t), parameter :: c1 = (t(c1%n))
                                 1
Error: PARAMETER ‘c1’ is used at (1) before its definition is complete
z2_type.f90:6:32:

    type(t), parameter :: c2 = t(c2%n)
                                1
Error: PARAMETER ‘c2’ is used at (1) before its definition is complete
z2_type.f90:7:22:

    type(t) :: c3 = (t(c3%n))
                      1
Error: Parameter ‘c3’ at (1) has not been declared or is a variable, which does
not reduce to a constant expression
z2_type.f90:8:21:

    type(t) :: c4 = t(c4%n)
                     1
Error: Parameter ‘c4’ at (1) has not been declared or is a variable, which does
not reduce to a constant Expression

#
# c5, c6 differs
#
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/51048] Class template inheritance doesn't work well with function-local types
Date: Mon, 15 Jun 2015 19:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idQ048

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
           Assignee|paolo.carlini at oracle dot com    |unassigned at gcc dot gnu.org
   Target Milestone|---                         |6.0

--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.