pt.c (unify): Check array has a domain, before checking whether it is variable sized.

cp:
	* pt.c (unify): Check array has a domain, before checking
	whether it is variable sized.
testsuite:
	* g++.old-deja/g++.pt/crash64.C: New test.

From-SVN: r38902

gcc/cp/ChangeLog

 2001-01-11  Nathan Sidwell  <nathan@codesourcery.com>
 
+	* pt.c (unify): Check array has a domain, before checking
+	whether it is variable sized.
+
+2001-01-11  Nathan Sidwell  <nathan@codesourcery.com>
+
 	* decl.c (grokparms): Unobfuscate and get correct diagnostic for
 	parameters with pointers to arrays of unknown bound.
 

gcc/cp/pt.c

@@ -8605,6 +8605,7 @@ unify (tparms, targs, parm, arg, strict)
 	 here.  */
       if (TREE_CODE (arg) == ARRAY_TYPE 
 	  && !uses_template_parms (arg)
+	  && TYPE_DOMAIN (arg)
 	  && (TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (arg)))
 	      != INTEGER_CST))
 	return 1;

gcc/testsuite/g++.old-deja/g++.pt/crash64.C

+// Build don't link:
+
+// Copyright (C) 2000 Free Software Foundation, Inc.
+// Contributed by Nathan Sidwell 10 Jan 2001 <nathan@codesourcery.com>
+
+// Bug 1546. We ICE'd trying to unify an array of unknown bound,
+// checking to see if it was a variable sized array.
+
+template <class _Tp> class allocator {};
+
+template <class _Tp, class _Allocator>
+struct _Alloc_traits
+{
+  static const bool _S_instanceless = false;
+};
+
+template <class _Tp, class _Tp1>
+struct _Alloc_traits<_Tp, allocator<_Tp1> >
+{
+  static const bool _S_instanceless = true;
+};
+
+typedef char state [];
+bool y = _Alloc_traits<state, allocator<state> >::_S_instanceless;