MDEV-30527 Assertion !m_freed_pages in mtr_t::start() on DROP TEMPORARY TABLE

mtr_t::commit(): Add special handling of
innodb_immediate_scrub_data_uncompressed for TEMPORARY TABLE.

This fixes a regression that was caused by
commit de4030e4 (MDEV-30400).

mysql-test/suite/innodb/r/innodb_scrub.result

@@ -10,3 +10,18 @@ FLUSH TABLE t1 FOR EXPORT;
 UNLOCK TABLES;
 NOT FOUND /unicycle|repairman/ in t1.ibd
 DROP TABLE t1;
+#
+# MDEV-30527 Assertion !m_freed_pages in mtr_t::start()
+# on DROP TEMPORARY TABLE
+#
+SET @scrub= @@GLOBAL.innodb_immediate_scrub_data_uncompressed;
+SET GLOBAL innodb_immediate_scrub_data_uncompressed= 1;
+SET @fpt=@@GLOBAL.innodb_file_per_table;
+SET GLOBAL innodb_file_per_table=0;
+CREATE TABLE t ENGINE=InnoDB AS SELECT 1;
+DROP TABLE t;
+SET GLOBAL innodb_file_per_table=@fpt;
+CREATE TEMPORARY TABLE tmp ENGINE=InnoDB AS SELECT 1;
+DROP TABLE tmp;
+SET GLOBAL INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED= @scrub;
+# End of 10.6 tests

mysql-test/suite/innodb/t/innodb_scrub.test

@@ -27,3 +27,19 @@ FLUSH TABLE t1 FOR EXPORT;
 UNLOCK TABLES;
 -- source include/search_pattern_in_file.inc
 DROP TABLE t1;
+
+--echo #
+--echo # MDEV-30527 Assertion !m_freed_pages in mtr_t::start()
+--echo # on DROP TEMPORARY TABLE
+--echo #
+SET @scrub= @@GLOBAL.innodb_immediate_scrub_data_uncompressed;
+SET GLOBAL innodb_immediate_scrub_data_uncompressed= 1;
+SET @fpt=@@GLOBAL.innodb_file_per_table;
+SET GLOBAL innodb_file_per_table=0;
+CREATE TABLE t ENGINE=InnoDB AS SELECT 1;
+DROP TABLE t;
+SET GLOBAL innodb_file_per_table=@fpt;
+CREATE TEMPORARY TABLE tmp ENGINE=InnoDB AS SELECT 1;
+DROP TABLE tmp;
+SET GLOBAL INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED= @scrub;
+--echo # End of 10.6 tests

storage/innobase/mtr/mtr0mtr.cc

@@ -210,7 +210,20 @@ void mtr_t::commit()
       srv_stats.log_write_requests.inc();
   }
   else
+  {
+    if (m_freed_pages)
+    {
+      ut_ad(!m_freed_pages->empty());
+      ut_ad(m_freed_space == fil_system.temp_space);
+      ut_ad(!is_trim_pages());
+      for (const auto &range : *m_freed_pages)
+        m_freed_space->add_free_range(range);
+      delete m_freed_pages;
+      m_freed_pages= nullptr;
+      m_freed_space= nullptr;
+    }
     release();
+  }
 
   release_resources();
 }