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  1. MariaDB Server
  2. MDEV-14237

Server crash on query with regexp_substr

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      Description

      select * from (
      select regexp_substr('a','^[A-Za-z]+') f
      )t
      where f = f

      causes server reboot. Error in mysql.err is :

      Error in `/usr/sbin/mysqld': double free or corruption (out): 0x00007f0730006110 ***
      

      After attaching gdb the cause seems to be in Item_func_regexp_substr::cleanup() function.

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            Assignee:
            igor Igor Babaev
            Reporter:
            Kavinski Stanley
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