re PR c++/20028 (class and then template class gives an ICE)

gcc/cp/ChangeLog:
PR c++/20028
* class.c (finish_struct): Initialize TYPE_SIZE_UNIT of a
template along with TYPE_SIZE.
gcc/testsuite/ChangeLog:
PR c++/20028
* g++.dg/template/crash34.C: New.

From-SVN: r95182

gcc/cp/ChangeLog

 2005-02-17  Alexandre Oliva  <aoliva@redhat.com>
 
+	PR c++/20028
+	* class.c (finish_struct): Initialize TYPE_SIZE_UNIT of a
+	template along with TYPE_SIZE.
+
 	PR c++/20022
 	* semantics.c (perform_deferred_access_checks): Use
 	get_deferred_access_checks to get the top of the stack.

gcc/cp/class.c

@@ -5111,6 +5111,7 @@ finish_struct (tree t, tree attributes)
 
       finish_struct_methods (t);
       TYPE_SIZE (t) = bitsize_zero_node;
+      TYPE_SIZE_UNIT (t) = size_zero_node;
 
       /* We need to emit an error message if this type was used as a parameter
 	 and it is an abstract type, even if it is a template. We construct

gcc/testsuite/ChangeLog

 2005-02-17  Alexandre Oliva  <aoliva@redhat.com>
 
+	PR c++/20028
+	* g++.dg/template/crash34.C: New.
+
 	PR c++/20022
 	* g++.dg/other/access3.C: New.
 

gcc/testsuite/g++.dg/template/crash34.C

+// { dg-do compile }
+
+// PR c++/20028
+
+// We used to crash when referencing TYPE_SIZE_UNIT of the messed-up
+// type used for x, because it was not initialized.
+
+class Foo;
+
+template <typename T> class Foo { }; // { dg-error "not a template type" }
+
+Foo<int> x; // { dg-error "not a template" }