re PR c++/16851 (ICE when throwing a comma expression)

        PR c++/16851
        * tree.c (stabilize_init): See through a COMPOUND_EXPR.

From-SVN: r86688

gcc/cp/ChangeLog

 2004-08-27  Jason Merrill  <jason@redhat.com>
 
+	PR c++/16851
+	* tree.c (stabilize_init): See through a COMPOUND_EXPR.
+
 	PR c++/13684
 	* decl.c (expand_static_init): Use thread-safety API.
 	(register_dtor_fn): Return the call, don't expand it.

gcc/cp/tree.c

@@ -2316,6 +2316,8 @@ stabilize_init (tree init, tree *initp)
 	t = TREE_OPERAND (t, 1);
       if (TREE_CODE (t) == TARGET_EXPR)
 	t = TARGET_EXPR_INITIAL (t);
+      if (TREE_CODE (t) == COMPOUND_EXPR)
+	t = expr_last (t);
       if (TREE_CODE (t) == CONSTRUCTOR
 	  && CONSTRUCTOR_ELTS (t) == NULL_TREE)
 	{

gcc/testsuite/g++.dg/eh/throw2.C

+// PR c++/16851
+
+struct A { A(int); };
+
+void f()
+{
+ throw (3,A(t));
+}