[pull] main from react:main - #644
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## Summary
Propagate errors returned while lowering block statements instead of
discarding them and continuing with partially built HIR.
The original issue was triggered by the SWC path, where a TypeScript
`this` pseudo-parameter remains in the AST but is omitted from
`ScopeInfo`. Lowering rejects the AST parameter, but the function-body
block wrapper previously swallowed that error and returned a partial
function.
```ts
function Component() {
useEffect(() => {
const get = (): Val => {
window.value = {
count: 0,
method(this: Val) {},
};
return window.value;
};
get().count++;
}, []);
}
```
This could emit a partial transform with the assignment removed:
```js
function Component() {
useEffect(() => {
const get = () => {
return window.value;
};
get().count++;
}, []);
}
```
## How did you test this change?
Added a [source-level reproduction against the SWC
adapter](https://github.com/wbinnssmith/swc/blob/114e9c55b2/crates/swc_ecma_react_compiler/src/tests/integration.rs#L1563-L1591)
using the same case above.
- With the current lowering crate, the test fails because the adapter
emits a partial program.
- With this change patched into the lowering dependency, the test passes
because compilation bails out.
- `cargo test --manifest-path compiler/Cargo.toml -p
react_compiler_lowering`
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