[region-isolation] Be more aggressive about not looking through Sendable values when getting underlying objects. #75131
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…ble values when getting underlying objects.
Otherwise, in cases like the following, we look through the load to x.boolean
and think that the closure is actually capturing x instead of y:
```swift
func testBooleanCapture(_ x: inout NonSendableKlass) {
let y = x.boolean
Task.detached { @mainactor [z = y] in
print(z)
}
}
```
rdar://131369987
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[region-isolation] Be more aggressive about not looking through Sendable values when getting underlying objects.
Otherwise, in cases like the following, we look through the load to x.boolean and think that the closure is actually capturing x instead of y:
rdar://131369987