Bug#13997024 SEGV IN SYNC_ARRAY_CELL_PRINT PRINTING OUT LONG SEMAPHORE WAIT DATA

Backport fix from mysql-5.6.

storage/innobase/sync/sync0arr.c

@@ -936,6 +936,8 @@ sync_array_print_long_waits(
 		return(FALSE);
 	}
 
+	sync_array_enter(sync_primary_wait_array);
+
 	for (i = 0; i < sync_primary_wait_array->n_cells; i++) {
 
 		double	diff;
@@ -970,6 +972,8 @@ sync_array_print_long_waits(
 		}
 	}
 
+	sync_array_exit(sync_primary_wait_array);
+
 	if (noticed) {
 		fprintf(stderr,
 			"InnoDB: ###### Starts InnoDB Monitor"

storage/innodb_plugin/sync/sync0arr.c

@@ -932,6 +932,8 @@ sync_array_print_long_waits(
 		return(FALSE);
 	}
 
+	sync_array_enter(sync_primary_wait_array);
+
 	for (i = 0; i < sync_primary_wait_array->n_cells; i++) {
 
 		double	diff;
@@ -966,6 +968,8 @@ sync_array_print_long_waits(
 		}
 	}
 
+	sync_array_exit(sync_primary_wait_array);
+
 	if (noticed) {
 		fprintf(stderr,
 			"InnoDB: ###### Starts InnoDB Monitor"