[Bug fortran/66927] [6 Regression] ICE in gfc_conf_procedure_call

["juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66927

--- Comment #15 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Here it it:
{{{
module lexers
  implicit none
  private
  type :: template_t
     private
     character(256) :: charset1
     integer :: len1
  end type template_t

contains

  subroutine match_quoted (tt, s, n)
    type(template_t), intent(in) :: tt
    character(*), intent(in) :: s
    integer, intent(out) :: n
    character(tt%len1) :: ch1
    ch1 = tt%charset1
  end subroutine match_quoted

end module lexers
}}}
I believe this comes from your commit, so I don't open up a new ticket. Would
be cool if this can be solved quickly.
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/68107] New: Non-VLA type whose size is half or more of the address space constructed via a pointer
Date: Mon, 26 Oct 2015 23:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idh107

            Bug ID: 68107
           Summary: Non-VLA type whose size is half or more of the address
                    space constructed via a pointer
           Product: gcc
           Version: 5.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ch3root at openwall dot com
  Target Milestone: ---

Due to an overflow in size calculation the following (seemingly reasonable)
program compiles fine, allocates too small array and crashes in a loop:

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

#define N (SIZE_MAX / sizeof(int) + 2)

int main(void)
{
  int (*p)[N];
  printf("%zu\n", sizeof *p);
  p = malloc(sizeof *p);
  if (!p)
    return 1;
  for (size_t i = 0; i < N; i++)
    (*p)[i] = 1;

  return 0;
}

According to https://gcc.gnu.org/bugzilla/show_bug.cgi?idh065#c4 : "Any
construction of a non-VLA type whose size is half or more of the address space
should receive a compile-time error, like you get if you don't use a pointer
here."