MDEV-33524: marked_for_read assertion with virtual column

mysql-test/suite/vcol/r/vcol_misc.result

@@ -591,3 +591,13 @@ DROP TABLE t;
 #
 # End of 10.5 tests
 #
+#
+# Start of 10.11 tests
+#
+SET character_set_connection=ucs2;
+CREATE TABLE t1 (d1 date not null, d2 date, gd text as (concat(d1,if(d1 <> d2, date_format(d2, 'to %y-%m-%d '), ''))) );
+SELECT (SELECT 1 FROM foo) FROM t1;
+ERROR 42S02: Table 'test.foo' doesn't exist
+INSERT INTO t1 (d1) VALUES ('2009-07-02');
+DROP TABLE t1;
+# End of 10.11 tests

mysql-test/suite/vcol/t/vcol_misc.test

@@ -207,7 +207,13 @@ SELECT COUNT(*) FROM t1;
 INSERT INTO t1 (a,tsv) VALUES (5,DEFAULT);
 INSERT DELAYED INTO t1 (a,tsv) VALUES (6,DEFAULT);
 FLUSH TABLES WITH READ LOCK;
+# Under view protocol the following SELECT is issued as CREATE VIEW on a
+# separate connection.  That statement blocks on the global read lock held
+# here and would not return until the UNLOCK TABLES below, which the same
+# client cannot reach while it waits.  Run it directly to avoid the deadlock.
+--disable_view_protocol
 SELECT COUNT(*) FROM t1;
+--enable_view_protocol
 set GLOBAL debug_dbug= @old_debug;
 unlock tables;
 DROP TABLE t1;
@@ -560,3 +566,18 @@ DROP TABLE t;
 --echo #
 --echo # End of 10.5 tests
 --echo #
+
+--echo #
+--echo # Start of 10.11 tests
+--echo #
+
+# Charset difference required which inserts a charset converter, forcing the column value read later.
+SET character_set_connection=ucs2;
+CREATE TABLE t1 (d1 date not null, d2 date, gd text as (concat(d1,if(d1 <> d2, date_format(d2, 'to %y-%m-%d '), ''))) );
+# Necessary to get table t1 into the cache.  Without this SELECT, the crash is not evident.
+--ERROR ER_NO_SUCH_TABLE
+SELECT (SELECT 1 FROM foo) FROM t1;
+INSERT INTO t1 (d1) VALUES ('2009-07-02');
+DROP TABLE t1;
+
+--echo # End of 10.11 tests

sql/table.cc

@@ -3723,6 +3723,7 @@ bool Vcol_expr_context::init()
   thd->set_n_backup_active_arena(table->expr_arena, &backup_arena);
   thd->stmt_arena= thd;
 
+  table->map= 1;
   inited= true;
   return false;
 }