Assertion `thd' failed for subquery errors

[sbester]

run on debug build:

explain extended select 1 from dual where `a`=(select 1);

Version: '5.3.0-MariaDB-alpha-valgrind-max-debug' socket: '/tmp/mysql.sock' port: 3306 Source distribution
mysqld: sql_select.cc:19197: void st_select_lex::print(THD*, String*, enum_query_type): Assertion `thd' failed.

regards,
sbester

[sbester (sbester)]

probably a known issue:

19194 void st_select_lex::print(THD *thd, String *str, enum_query_type query_type)
19195 {
19196 /* TODO: thd may not be set for sub queries, but this should be fixed */
19197 DBUG_ASSERT(thd);
19198 if (!thd)
19199 thd= current_thd;