re PR c++/58705 ([c++11] ICE with invalid initializer for _Complex variable)

	PR c++/58705
cp/
	* typeck2.c (check_narrowing): Don't check narrowing when the scalar
	initializer is empty.
testsuite/
	* g++.dg/parse/pr58705.C: New test.

From-SVN: r204014

gcc/cp/ChangeLog

+2013-10-24  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/58705
+	* typeck2.c (check_narrowing): Don't check narrowing when the scalar
+	initializer is empty.
+
 2013-10-23  Jason Merrill  <jason@redhat.com>
 
 	LWG 2165

gcc/cp/typeck2.c

@@ -834,7 +834,8 @@ check_narrowing (tree type, tree init)
       && TREE_CODE (type) == COMPLEX_TYPE)
     {
       tree elttype = TREE_TYPE (type);
-      check_narrowing (elttype, CONSTRUCTOR_ELT (init, 0)->value);
+      if (CONSTRUCTOR_NELTS (init) > 0)
+        check_narrowing (elttype, CONSTRUCTOR_ELT (init, 0)->value);
       if (CONSTRUCTOR_NELTS (init) > 1)
 	check_narrowing (elttype, CONSTRUCTOR_ELT (init, 1)->value);
       return;

gcc/testsuite/ChangeLog

 2013-10-24  Marek Polacek  <polacek@redhat.com>
 
+	PR c++/58705
+	* g++.dg/parse/pr58705.C: New test.
+
+2013-10-24  Marek Polacek  <polacek@redhat.com>
+
 	* gcc.dg/c11-align-5.c: Add more testing.
 
 2013-10-23  Pat Haugen  <pthaugen@us.ibm.com>

gcc/testsuite/g++.dg/parse/pr58705.C

+// PR c++/58705
+// { dg-do compile }
+// { dg-options "-Wnarrowing" }
+
+_Complex float f = {{}};