Buildbot shows a crash in JOIN::make_aggr_tables_info() on windows

   for (tbl= tbl->next_local; ht && tbl; tbl= tbl->next_local)

mysqld.exe!JOIN::make_aggr_tables_info()[sql_select.cc:2128]

mysqld.exe!JOIN::optimize_inner()[sql_select.cc:1369]

mysqld.exe!JOIN::optimize()[sql_select.cc:1039]

mysqld.exe!mysql_select()[sql_select.cc:3475]

mysqld.exe!handle_select()[sql_select.cc:376]

mysqld.exe!execute_sqlcom_select()[sql_parse.cc:5902]

mysqld.exe!mysql_execute_command()[sql_parse.cc:2961]

mysqld.exe!mysql_parse()[sql_parse.cc:7307]

mysqld.exe!dispatch_command()[sql_parse.cc:1490]

mysqld.exe!do_command()[sql_parse.cc:1109]

mysqld.exe!threadpool_process_request()[threadpool_common.cc:238]

mysqld.exe!io_completion_callback()[threadpool_win.cc:568]

kernel32.dll!BaseFormatTimeOut()

ntdll.dll!RtlEqualDomainName()

ntdll.dll!RtlValidateHeap()

kernel32.dll!BaseThreadInitThunk()

ntdll.dll!RtlUserThreadStart()