- [`KT-64871`](https://youtrack.jetbrains.com/issue/KT-64871) IrFakeOverrideBuilder: ISE "no override for <get-size>" on HashMap subclass
- [`KT-58739`](https://youtrack.jetbrains.com/issue/KT-58739) K2: Rewrite `CallableId.classId` to be thread-safe
- [`KT-64979`](https://youtrack.jetbrains.com/issue/KT-64979) K2: Missing REDUNDANT_TYPE_PARCELER when using type alias
- [`KT-60019`](https://youtrack.jetbrains.com/issue/KT-60019) K2: Introduced PARCELER_TYPE_INCOMPATIBLE

for k, v := range t.Walk {
	// process k, v
}
</pre>


<h3 id="Go_statements">Go statements</h3>

<p>
A "go" statement starts the execution of a function call
as an independent concurrent thread of control, or <i>goroutine</i>,
within the same address space.
</p>

<pre class="ebnf">
GoStmt = "go" Expression .
</pre>

<p>

* Add docs for correctly [using FastAPI with Peewee ORM](https://fastapi.tiangolo.com/advanced/sql-databases-peewee/). Including how to overwrite parts of Peewee to correctly handle async threads. PR [#789](https://github.com/tiangolo/fastapi/pull/789).

## 0.45.0

* Add support for OpenAPI Callbacks:
    * New docs: [OpenAPI Callbacks](https://fastapi.tiangolo.com/advanced/openapi-callbacks/).