Crash in Item_field::type_handler

#5  0x0000561f8fe62c68 in Item_field::type_handler (this=<optimized out>) at /home/buildbot/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.2.13/sql/item.h:2832

        handler = <optimized out>

#6  0x0000561f8fe59289 in Item_splocal::fix_fields (this=0x7fb8f0043e70, thd=0x7fb8f0084c68, ref=0x0) at /home/buildbot/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.2.13/sql/item.cc:1807

        item = 0x7fb8f0255078

#7  0x0000561f8fc10931 in Item_splocal::append_for_log (this=0x7fb8f0043e70, thd=0x7fb8f0084c68, str=0x7fcea417ccc0) at /home/buildbot/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.2.13/sql/sp_head.cc:101

No locals.

#8  0x0000561f8fc10623 in append (p=0x7fb8f0043f10, this=<synthetic pointer>) at /home/buildbot/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.2.13/sql/item.h:511

No locals.

#9  subst_spvars (thd=thd@entry=0x7fb8f0084c68, instr=instr@entry=0x7fb8f0044738, query_str=query_str@entry=0x7fb8f0044770) at /home/buildbot/buildbot/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/mariadb-10.2.13/sql/sp_head.cc:1103

  const Type_handler *type_handler() const

  {

    const Type_handler *handler= field->type_handler();

    return handler->type_handler_for_item_field();

  }

bool Item_splocal::fix_fields(THD *thd, Item **ref)

{

  Item *item= get_item(thd->spcont);

  set_handler(item->type_handler());

  return fix_fields_from_item(thd, ref, item);

}

bool Item_splocal::append_for_log(THD *thd, String *str)

{

  if (fix_fields(thd, NULL))

    return true;