re PR c++/49776 ([C++0x]ICE in build_data_member_initialization, at cp/semantics.c:5499)

/cp
2011-07-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/49776
	* typeck.c (cp_build_modify_expr): Check digest_init return value
	for error_mark_node.

/testsuite
2011-07-26  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/49776
	* g++.dg/cpp0x/constexpr-49776.C: New.

From-SVN: r176809

gcc/cp/ChangeLog

+2011-07-26  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/49776
+	* typeck.c (cp_build_modify_expr): Check digest_init return value
+	for error_mark_node.
+
 2011-07-25  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR bootstrap/49845

gcc/cp/typeck.c

@@ -6753,6 +6753,8 @@ cp_build_modify_expr (tree lhs, enum tree_code modifycode, tree rhs,
 	  if (check_array_initializer (lhs, lhstype, newrhs))
 	    return error_mark_node;
 	  newrhs = digest_init (lhstype, newrhs, complain);
+	  if (newrhs == error_mark_node)
+	    return error_mark_node;
 	}
 
       else if (!same_or_base_type_p (TYPE_MAIN_VARIANT (lhstype),

gcc/testsuite/ChangeLog

+2011-07-26  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/49776
+	* g++.dg/cpp0x/constexpr-49776.C: New.
+
 2011-07-26  Sebastian Pop  <sebastian.pop@amd.com>
 
 	PR middle-end/47046

gcc/testsuite/g++.dg/cpp0x/constexpr-49776.C

+// PR c++/49776
+// { dg-options -std=c++0x }
+
+struct s
+{
+  int i[1];
+
+  template<class... Types>
+    constexpr s(Types... args)
+    : i{args...}  // { dg-error "cannot convert" }
+    { }
+};
+
+int main()
+{
+  s test = nullptr;
+}