re PR c++/10471 (SegFault in build_cxx_call)

	PR c++/10471
	* call.c (build_cxx_call): Robustify.

	PR c++/10471
	* g++.dg/template/defarg2.C: New test.

From-SVN: r66032

gcc/cp/ChangeLog

+2003-04-23  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/10471
+	* call.c (build_cxx_call): Robustify.
+
 2003-04-23  Neil Booth  <neil@daikokuya.co.uk>
 
 	* Make-lang.in (lex.o): Remove mbchar.h.

gcc/cp/call.c

@@ -4737,7 +4737,9 @@ build_cxx_call(tree fn, tree args, tree converted_args)
 
   /* If this call might throw an exception, note that fact.  */
   fndecl = get_callee_fndecl (fn);
-  if ((!fndecl || !TREE_NOTHROW (fndecl)) && at_function_scope_p ())
+  if ((!fndecl || !TREE_NOTHROW (fndecl)) 
+      && at_function_scope_p ()
+      && cfun)
     cp_function_chain->can_throw = 1;
 
   /* Some built-in function calls will be evaluated at compile-time in

gcc/testsuite/ChangeLog

+2003-04-23  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/10471
+	* g++.dg/template/defarg2.C: New test.
+
 2003-04-23  Neil Booth  <neil@daikokuya.co.uk>
 
 	* gcc.dg/cpp/include2.c: Update.

gcc/testsuite/g++.dg/template/defarg2.C

+struct X {
+    X ();
+};
+
+template <int> struct O {
+    struct I {
+        I (const X & = X());
+    };
+};
+template struct O<2>;