MDEV-14058 InnoDB Assertion failure !leaf on rem0rec.cc line 566 on test innodb_gis.rtree_recovery

The function rtr_update_mbr_field_in_place() is generating
MLOG_REC_UPDATE_IN_PLACE or MLOG_COMP_REC_UPDATE_IN_PLACE records
on non-leaf pages, even though MLOG_WRITE_STRING would perfectly
suffice for updating a fixed-length data field.

btr_cur_parse_update_in_place(): If flags==7, the record may be
from rtr_update_mbr_field_in_place(), and we must check if the
page is a leaf page. Otherwise, assume that it is.

btr_cur_update_in_place(): Assert that the page is a leaf page.

mysql-test/suite/innodb_gis/disabled.def

@@ -14,7 +14,6 @@ gis_split_inf : MDEV-14057 InnoDB GIS tests fail
 row_format : MDEV-14057 InnoDB GIS tests fail
 rtree_estimate : MDEV-14057 InnoDB GIS tests fail
 rtree_multi_pk : MDEV-14057 InnoDB GIS tests fail
-rtree_recovery : MDEV-14058 InnoDB Assertion failure !leaf on rem0rec.cc line 566 on test innodb_gis.rtree_recovery
 tree_search : MDEV-14057 InnoDB GIS tests fail
 rtree_concurrent_srch: MDEV-14059 InnoDB assertion failure offset >= ((38U + 36 + 2 * 10) + 5) at page0page.h line 318
 point_big : MDEV-14057 InnoDB GIS tests fail

mysql-test/suite/innodb_gis/r/rtree_recovery.result

-# restart
 create table t1 (c1 int, c2 geometry not null, spatial index (c2))engine=innodb;
 create procedure insert_t1(IN total int)
 begin
@@ -33,10 +32,9 @@ Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 select count(*) from t1;
 count(*)
-18
+17
 select c1, ST_astext(c2) from t1;
 c1	ST_astext(c2)
-350	POINT(10350 10350)
 351	POINT(10351 10351)
 352	POINT(10352 10352)
 353	POINT(10353 10353)

storage/innobase/btr/btr0cur.cc

@@ -3485,7 +3485,15 @@ btr_cur_parse_update_in_place(
 	/* We do not need to reserve search latch, as the page is only
 	being recovered, and there cannot be a hash index to it. */
 
-	offsets = rec_get_offsets(rec, index, NULL, true,
+	/* The function rtr_update_mbr_field_in_place() is generating
+	these records on node pointer pages; therefore we have to
+	check if this is a leaf page. */
+
+	offsets = rec_get_offsets(rec, index, NULL,
+				  flags != (BTR_NO_UNDO_LOG_FLAG
+					    | BTR_NO_LOCKING_FLAG
+					    | BTR_KEEP_SYS_FLAG)
+				  || page_is_leaf(page),
 				  ULINT_UNDEFINED, &heap);
 
 	if (!(flags & BTR_KEEP_SYS_FLAG)) {
@@ -3620,6 +3628,7 @@ btr_cur_update_in_place(
 	roll_ptr_t	roll_ptr	= 0;
 	ulint		was_delete_marked;
 
+	ut_ad(page_is_leaf(cursor->page_cur.block->frame));
 	rec = btr_cur_get_rec(cursor);
 	index = cursor->index;
 	ut_ad(rec_offs_validate(rec, index, offsets));