Fix LifetimeDependenceDiagnostics: allow inout assignment to Void. #82831
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Bypess lifetime dependence diagnostics completely for immortal values. We did
not do this initially because we wanted to potentially consider a value with a missing
dependency to mean that it could not escape the current function. But now we use
`Void` as a stand-in for immortal values.
This is needed for reassigning a Span/MutableSpan to an empty, immortal
Span:
func inoutToImmortal(_ s: inout RawSpan) {
let tmp = RawSpan(_unsafeBytes: UnsafeRawBufferPointer(start: nil, count: 0))
s = _overrideLifetime(tmp, borrowing: ())
}
Fixes rdar://152572002 ([GH:swiftlang#81976] Cannot reinitialize inout parameter of type
`MutableSpan<T>?`)
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@swift-ci test |
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@swift-ci smoke test macOS |
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@swift-ci smoke test macOS |
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three time-outs in a row building LLVM |
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@swift-ci smoke test |
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Bypess lifetime dependence diagnostics completely for immortal values. We did
not do this initially because we wanted to potentially consider a value with a missing
dependency to mean that it could not escape the current function. But now we use
Voidas a stand-in for immortal values.This is needed for reassigning a Span/MutableSpan to an empty, immortal
Span:
Fixes rdar://152572002 ([GH:#81976] Cannot reinitialize inout parameter of type
MutableSpan<T>?)