re PR c++/88258 (Infinite loop emitting diagnostics in the C++ front-end)

	PR c++/88258
	* parser.c (cp_parser_skip_to_closing_parenthesis_1,
	cp_parser_skip_to_end_of_statement,
	cp_parser_skip_to_end_of_block_or_statement,
	cp_parser_skip_to_closing_brace,
	cp_parser_skip_to_closing_square_bracket,
	cp_parser_skip_balanced_tokens): Don't treat CPP_PRAGMA_EOL specially
	if in_pragma is false.

	* g++.dg/gomp/pr88258.C: New test.

From-SVN: r266720

gcc/cp/ChangeLog

+2018-12-02  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/88258
+	* parser.c (cp_parser_skip_to_closing_parenthesis_1,
+	cp_parser_skip_to_end_of_statement,
+	cp_parser_skip_to_end_of_block_or_statement,
+	cp_parser_skip_to_closing_brace,
+	cp_parser_skip_to_closing_square_bracket,
+	cp_parser_skip_balanced_tokens): Don't treat CPP_PRAGMA_EOL specially
+	if in_pragma is false.
+
 2018-12-01  Marek Polacek  <polacek@redhat.com>
 
 	Implement P0634R3, Down with typename!

gcc/cp/parser.c

@@ -3558,8 +3558,11 @@ cp_parser_skip_to_closing_parenthesis_1 (cp_parser *parser,
 
       switch (token->type)
 	{
-	case CPP_EOF:
 	case CPP_PRAGMA_EOL:
+	  if (!parser->lexer->in_pragma)
+	    break;
+	  /* FALLTHRU */
+	case CPP_EOF:
 	  /* If we've run out of tokens, then there is no closing `)'.  */
 	  return 0;
 
@@ -3654,8 +3657,11 @@ cp_parser_skip_to_end_of_statement (cp_parser* parser)
 
       switch (token->type)
 	{
-	case CPP_EOF:
 	case CPP_PRAGMA_EOL:
+	  if (!parser->lexer->in_pragma)
+	    break;
+	  /* FALLTHRU */
+	case CPP_EOF:
 	  /* If we've run out of tokens, stop.  */
 	  return;
 
@@ -3744,8 +3750,11 @@ cp_parser_skip_to_end_of_block_or_statement (cp_parser* parser)
 
       switch (token->type)
 	{
-	case CPP_EOF:
 	case CPP_PRAGMA_EOL:
+	  if (!parser->lexer->in_pragma)
+	    break;
+	  /* FALLTHRU */
+	case CPP_EOF:
 	  /* If we've run out of tokens, stop.  */
 	  return;
 
@@ -3794,8 +3803,11 @@ cp_parser_skip_to_closing_brace (cp_parser *parser)
 
       switch (token->type)
 	{
-	case CPP_EOF:
 	case CPP_PRAGMA_EOL:
+	  if (!parser->lexer->in_pragma)
+	    break;
+	  /* FALLTHRU */
+	case CPP_EOF:
 	  /* If we've run out of tokens, stop.  */
 	  return false;
 
@@ -22560,8 +22572,11 @@ cp_parser_skip_to_closing_square_bracket (cp_parser *parser)
 
       switch (token->type)
 	{
-	case CPP_EOF:
 	case CPP_PRAGMA_EOL:
+	  if (!parser->lexer->in_pragma)
+	    break;
+	  /* FALLTHRU */
+	case CPP_EOF:
 	  /* If we've run out of tokens, then there is no closing `]'.  */
 	  return false;
 
@@ -26074,8 +26089,11 @@ cp_parser_skip_balanced_tokens (cp_parser *parser, size_t n)
   do
     switch (cp_lexer_peek_nth_token (parser->lexer, n++)->type)
       {
-      case CPP_EOF:
       case CPP_PRAGMA_EOL:
+	if (!parser->lexer->in_pragma)
+	  break;
+	/* FALLTHRU */
+      case CPP_EOF:
 	/* Ran out of tokens.  */
 	return orig_n;
       case CPP_OPEN_PAREN:

gcc/testsuite/ChangeLog

+2018-12-02  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/88258
+	* g++.dg/gomp/pr88258.C: New test.
+
 2018-12-01  Marek Polacek  <polacek@redhat.com>
 
 	Implement P0634R3, Down with typename!

gcc/testsuite/g++.dg/gomp/pr88258.C

+// PR c++/88258
+// { dg-do compile }
+// { dg-options "-fopenmp" }
+
+void
+foo (bar int p)		// { dg-error "variable or field|was not declared in this scope" }
+{
+  int i, x;
+  #pragma omp atomic write
+  x = 6;
+}