PR c++/92450 - ICE with invalid nested name specifier.

	* parser.c (cp_parser_member_declaration): Don't attempt to print
	erroneous bit-field diagnostic if grokdeclarator returns
	error_mark_node.

	* g++.dg/parse/crash71.C: New test.

From-SVN: r278570

gcc/cp/ChangeLog

+2019-11-21  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/92450 - ICE with invalid nested name specifier.
+	* parser.c (cp_parser_member_declaration): Don't attempt to print
+	erroneous bit-field diagnostic if grokdeclarator returns
+	error_mark_node.
+
 2019-11-21  Jakub Jelinek  <jakub@redhat.com>
 	    Jason Merrill  <jason@redhat.com>
 

gcc/cp/parser.c

@@ -25062,9 +25062,10 @@ cp_parser_member_declaration (cp_parser* parser)
 		  tree d = grokdeclarator (declarator, &decl_specifiers,
 					   BITFIELD, /*initialized=*/false,
 					   &attributes);
-		  error_at (DECL_SOURCE_LOCATION (d),
-			    "bit-field %qD has non-integral type %qT",
-			    d, TREE_TYPE (d));
+		  if (!error_operand_p (d))
+		    error_at (DECL_SOURCE_LOCATION (d),
+			      "bit-field %qD has non-integral type %qT",
+			      d, TREE_TYPE (d));
 		  cp_parser_skip_to_end_of_statement (parser);
 		  /* Avoid "extra ;" pedwarns.  */
 		  if (cp_lexer_next_token_is (parser->lexer,

gcc/testsuite/ChangeLog

+2019-11-21  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/92450 - ICE with invalid nested name specifier.
+	* g++.dg/parse/crash71.C: New test.
+
 2019-11-21  Wilco Dijkstra  <wdijkstr@arm.com>
 
 	* gfortran.dg/global_vars_f90_init_driver.c: Add missing extern.

gcc/testsuite/g++.dg/parse/crash71.C

+// PR c++/92450 - ICE with invalid nested name specifier.
+
+typedef int C2;
+struct B1 {
+  struct B2 {
+  };
+};
+
+struct S6g {
+  C2 : B1:B2; // { dg-error "" }
+};