re PR c++/19667 (ICE on (very trivial) invalid)

	PR c++/19667
	* g++.dg/template/crash32.C: New test.

	PR c++/19667
	* pt.c (redeclare_class_template): Robustify.

From-SVN: r94402

gcc/cp/ChangeLog

+2005-01-28  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/19667
+	* pt.c (redeclare_class_template): Robustify.
+
 2005-01-27  Steven Bosscher  <stevenb@suse.de>
 
 	* decl.c (finish_case_label): Use SWITCH_STMT accessor macros

gcc/cp/pt.c

@@ -3236,6 +3236,13 @@ redeclare_class_template (tree type, tree parms)
        type.  */
     return;
 
+  if (!parms)
+    {
+      error ("template specifiers not specified in declaration of %qD",
+	     tmpl);
+      return;
+    }
+
   parms = INNERMOST_TEMPLATE_PARMS (parms);
   tmpl_parms = DECL_INNERMOST_TEMPLATE_PARMS (tmpl);
 

gcc/testsuite/ChangeLog

+2005-01-28  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/19667
+	* g++.dg/template/crash32.C: New test.
+
 2005-01-28  Ian Lance Taylor  <ian@airs.com>
 
 	PR middle-end/16558

gcc/testsuite/g++.dg/template/crash32.C

+// PR c++/19667
+
+struct integral_constant { };
+
+template<typename _Tp>
+struct is_function : public integral_constant { }; // { dg-error "previous" }
+
+template<>
+struct is_function : public integral_constant { }; // { dg-error "" }