BtrBulk::table_name(): Return the table name while displaying

table name for fts diagnostics

storage/innobase/include/btr0bulk.h

@@ -326,7 +326,7 @@ class BtrBulk
 	/** Re-latch all latches */
 	void latch();
 
-	dict_index_t* index() { return m_index; }
+	table_name_t table_name() { return m_index->table->name; }
 
 private:
 	/** Insert a tuple to a page in a level

storage/innobase/row/row0ftsort.cc

@@ -1221,7 +1221,7 @@ row_merge_write_fts_word(
 		if (UNIV_UNLIKELY(error != DB_SUCCESS)) {
 			ib::error() << "Failed to write word to FTS auxiliary"
 				" index table "
-				<< ins_ctx->btr_bulk->index()->table->name
+				<< ins_ctx->btr_bulk->table_name()
 				<< ", error " << error;
 			ret = error;
 		}