Pavel Yaskevich 385fb0c665 [Diagnostics] Make force downcast fix contextual and move it to repairFailures ...

This way it covers a lot more ground and doesn't conflict with
other fixes.

Another notable change is related to check for IUO associated
with source type, that covers cases like:

```swift
func foo(_ v: NSString!) -> String {
  return v
}
```

Instead of general conversion failure check for IUO enables solver
to introduce force downcast fix.

2019-08-09 01:09:52 -07:00

1.1 KiB

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