re PR c++/79435 (ICE on invalid C++ code (with member access into an incomplete…

re PR c++/79435 (ICE on invalid C++ code (with member access into an incomplete type) on x86_64-linux-gnu: Segmentation fault)

	PR c++/79435
	* pt.c (type_dependent_expression_p): Check if the expression type
	is null.

	* g++.dg/cpp1y/pr79435.C: New.

From-SVN: r245334

gcc/cp/ChangeLog

+2017-02-10  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/79435
+	* pt.c (type_dependent_expression_p): Check if the expression type
+	is null.
+
 2017-02-10  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/71737

gcc/cp/pt.c

@@ -23818,6 +23818,7 @@ type_dependent_expression_p (tree expression)
      we couldn't determine its length in cp_complete_array_type because
      it is dependent.  */
   if (VAR_P (expression)
+      && TREE_TYPE (expression) != NULL_TREE
       && TREE_CODE (TREE_TYPE (expression)) == ARRAY_TYPE
       && !TYPE_DOMAIN (TREE_TYPE (expression))
       && DECL_INITIAL (expression))

gcc/testsuite/ChangeLog

+2017-02-10  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/79435
+	* g++.dg/cpp1y/pr79435.C: New.
+
 2017-02-10  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	* gcc.target/aarch64/advsimd-intrinsics/p64_p128.c

gcc/testsuite/g++.dg/cpp1y/pr79435.C

+// PR c++/79435
+// { dg-do compile { target c++14 } }
+
+struct A;
+extern A a; // { dg-error "'a' has incomplete type" }
+template < int > int f = a.x;