[Bug fortran/49278] internal compiler error: Segmentation fault

[sgk at troutmask dot apl.washington.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49278

--- Comment #2 from Steve Kargl <sgk at troutmask dot apl.washington.edu> 
2011-06-03 18:10:40 UTC ---
On Fri, Jun 03, 2011 at 04:08:05PM +0000, kargl at gcc dot gnu.org wrote:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49278
> 
> Reduced testcase.
> 
> module oad_active
>    implicit none
>    type active
>       sequence
>       real :: v 
>       real :: d =0.
>    end type
> end module
> 
> module tots_c
>    use oad_active
>    implicit none
>    type(active), save :: trlkold
>    data trlkold%v /0./
> end module
> 

This simply patch fixes the segfault with the compiler.

Index: trans-expr.c
===================================================================
--- trans-expr.c        (revision 174566)
+++ trans-expr.c        (working copy)
@@ -4638,7 +4638,7 @@ gfc_conv_structure (gfc_se * se, gfc_exp
   cm = expr->ts.u.derived->components;

   for (c = gfc_constructor_first (expr->value.constructor);
-       c; c = gfc_constructor_next (c), cm = cm->next)
+       c && cm; c = gfc_constructor_next (c), cm = cm->next)
     {
       /* Skip absent members in default initializers and allocatable
         components.  Although the latter have a default initializer


It's not clear if it achieves the desired result.  The following
aborts.  Note sure if it is conforming.

module oad_active
   implicit none
   type active
      integer :: v 
      integer :: d = 42
   end type
end module

module tots_c
   use oad_active
   implicit none
   type(active), save :: trlkold
   data trlkold%v /100/
end module

program foo
   use tots_c
   implicit none
   if (trlkold%d /= 42) call abort
   if (trlkold%v /= 100) call abort
end program foo