* Fixed `Illegal instruction` error when using base64 functions on old CPUs. This error has been reproduced only when ClickHouse was compiled with gcc-8. [#4275](https://github.com/yandex/ClickHouse/pull/4275)([alexey-milovidov](https://github.com/alexey-milovidov))
* Fixed `No message received` error when interacting with PostgreSQL ODBC Driver through TLS connection. Also fixes segfault when using MySQL ODBC Driver. [#4170](https://github.com/yandex/ClickHouse/pull/4170)([alexey-milovidov](https://github.com/alexey-milovidov))
* Fixed incorrect result when `Date` and `DateTime` arguments are used in branches of conditional operator (function `if`). Added generic case for function `if`. [#4243](https://github.com/yandex/ClickHouse/pull/4243)([alexey-milovidov](https://github.com/alexey-milovidov))
*Fixed an issue: local ClickHouse dictionaries are loaded via TCP, but should load within process. [#4166](https://github.com/yandex/ClickHouse/pull/4166)([alexey-milovidov](https://github.com/alexey-milovidov))
*ClickHouse dictionaries now load within `clickhouse` process. [#4166](https://github.com/yandex/ClickHouse/pull/4166)([alexey-milovidov](https://github.com/alexey-milovidov))
* Fixed deadlock when `SELECT` from a table with `File` engine was retried after `No such file or directory` error. [#4161](https://github.com/yandex/ClickHouse/pull/4161)([alexey-milovidov](https://github.com/alexey-milovidov))
* Fixed race condition when selecting from `system.tables` may give `table doesn't exist` error. [#4313](https://github.com/yandex/ClickHouse/pull/4313)([alexey-milovidov](https://github.com/alexey-milovidov))
*`clickhouse-client` can segfault on exit while loading data for command line suggestions if it was run in interactive mode. [#4317](https://github.com/yandex/ClickHouse/pull/4317)([alexey-milovidov](https://github.com/alexey-milovidov))
