MDEV-5670: Assertion failure in file buf0lru.c line 2355

Add more status information if repeatable.

storage/innobase/btr/btr0cur.c

@@ -282,6 +282,7 @@ btr_cur_latch_leaves(
 	case BTR_MODIFY_TREE:
 		/* x-latch also brothers from left to right */
 		left_page_no = btr_page_get_prev(page, mtr);
+		mode = latch_mode;
 
 		if (left_page_no != FIL_NULL) {
 			get_block = btr_block_get(

storage/innobase/buf/buf0lru.c

@@ -2080,6 +2080,15 @@ buf_LRU_block_remove_hashed_page(
 			" in the hash table\n",
 			(ulong) bpage->space,
 			(ulong) bpage->offset);
+		fprintf(stderr,
+			"InnoDB: in_page_hash %lu in_zip_hash %lu\n"
+			" in_free_list %lu in_flush_list %lu in_LRU_list %lu\n"
+			" zip.data %p zip_size %lu page_state %d\n",
+			bpage->in_page_hash, bpage->in_zip_hash,
+			bpage->in_free_list, bpage->in_flush_list,
+			bpage->in_LRU_list, bpage->zip.data,
+			buf_page_get_zip_size(bpage),
+			buf_page_get_state(bpage));
 		if (hashed_bpage) {
 			fprintf(stderr,
 				"InnoDB: In hash table we find block"

storage/xtradb/buf/buf0lru.c

@@ -2372,6 +2372,17 @@ buf_LRU_block_remove_hashed_page(
 			" in the hash table\n",
 			(ulong) bpage->space,
 			(ulong) bpage->offset);
+
+		fprintf(stderr,
+			"InnoDB: in_page_hash %lu in_zip_hash %lu\n"
+			" in_free_list %lu in_flush_list %lu in_LRU_list %lu\n"
+			" zip.data %p zip_size %lu page_state %d\n",
+			bpage->in_page_hash, bpage->in_zip_hash,
+			bpage->in_free_list, bpage->in_flush_list,
+			bpage->in_LRU_list, bpage->zip.data,
+			buf_page_get_zip_size(bpage),
+			buf_page_get_state(bpage));
+
 		if (hashed_bpage) {
 			fprintf(stderr,
 				"InnoDB: In hash table we find block"
@@ -2382,6 +2393,9 @@ buf_LRU_block_remove_hashed_page(
 				(const void*) bpage);
 		}
 
+		ut_a(buf_page_get_io_fix(bpage) == BUF_IO_NONE);
+		ut_a(bpage->buf_fix_count == 0);
+
 #if defined UNIV_DEBUG || defined UNIV_BUF_DEBUG
 		mutex_exit(buf_page_get_mutex(bpage));
 		//buf_pool_mutex_exit(buf_pool);