re PR c/71853 (ICE on an ill-formed case statement in c_do_switch_warnings)

	PR c/71853
	* c-parser.c (c_parser_switch_statement): Initialize ce.original_type
	to error node for invalid code.

	* gcc.dg/noncompile/pr71853.c: New test.

From-SVN: r238884

gcc/c/ChangeLog

@@ -3,6 +3,10 @@
 	PR c/71742
 	* c-decl.c (finish_struct): Rephrase an error message.
 
+	PR c/71853
+	* c-parser.c (c_parser_switch_statement): Initialize ce.original_type
+	to error node for invalid code.
+
 2016-07-29  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/71969

gcc/c/c-parser.c

@@ -5661,6 +5661,7 @@ c_parser_switch_statement (c_parser *parser, bool *if_p)
     {
       switch_cond_loc = UNKNOWN_LOCATION;
       expr = error_mark_node;
+      ce.original_type = error_mark_node;
     }
   c_start_case (switch_loc, switch_cond_loc, expr, explicit_cast_p);
   save_break = c_break_label;

gcc/testsuite/ChangeLog

@@ -5,6 +5,9 @@
 	* gcc.dg/c99-flex-array-1.c: Likewise.
 	* gcc.dg/c99-flex-array-typedef-1.c: Likewise.
 
+	PR c/71853
+	* gcc.dg/noncompile/pr71853.c: New test.
+
 2016-07-29  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.dg/pr59833.c: Use dg-add-options ieee.

gcc/testsuite/gcc.dg/noncompile/pr71853.c

+/* PR c/71853 */
+/* { dg-do compile } */
+
+void f (void)
+{
+  case (0) { /* { dg-error "expected" } */
+    switch 0: { } /* { dg-error "expected" } */
+  }
+}