re PR fortran/34202 (ICE (segfault) for invalid code in formalize_init_expr (data.c:691))

gcc/fortran:
2008-01-24  Daniel Franke  <franke.daniel@gmail.com>

        PR fortran/34202
	* data.c (formalize_structure_cons): Skip formalization on
	empty structures.

gcc/testsuite:
2008-01-24  Daniel Franke  <franke.daniel@gmail.com>

        PR fortran/34202
        * gfortran.dg/empty_type.f90: New test.

From-SVN: r131810

gcc/fortran/ChangeLog

 2008-01-24  Daniel Franke  <franke.daniel@gmail.com>
 
+	PR fortran/34202
+	* data.c (formalize_structure_cons): Skip formalization on
+	empty structures.
+
+2008-01-24  Daniel Franke  <franke.daniel@gmail.com>
+
 	* gfortran.texi (OpenMP): Extended existing documentation.
 	(contributors): Added major contributors of 2008 that were
 	not listed yet.

gcc/fortran/data.c

@@ -688,7 +688,7 @@ formalize_structure_cons (gfc_expr *expr)
   c = expr->value.constructor;
 
   /* Constructor is already formalized.  */
-  if (c->n.component == NULL)
+  if (!c || c->n.component == NULL)
     return;
 
   head = tail = NULL;

gcc/testsuite/ChangeLog

+2008-01-24  Daniel Franke  <franke.daniel@gmail.com>
+
+	PR fortran/34202
+	* gfortran.dg/empty_type.f90: New test.
+
 2008-01-24  Paolo Carlini  <pcarlini@suse.de>
 
-        PR c++/34603
-        * g++.dg/template/crash77.C: New.
+	PR c++/34603
+	* g++.dg/template/crash77.C: New.
 
 2008-01-24  Uros Bizjak  <ubizjak@gmail.com>
 

gcc/testsuite/gfortran.dg/empty_type.f90

+! { dg-do compile }
+! PR fortran/34202
+! ICE on contruction of empty types
+! Testcase contributed by Tobias Burnus
+
+program bug4a
+  implicit none
+  type bug4
+    ! Intentionally left empty
+  end type bug4
+
+  type compound
+    type(bug4) b
+  end type compound
+
+  type(bug4), parameter :: f = bug4()
+  type(compound), parameter :: g = compound(bug4())
+end program bug4a
+