[pull] swiftwasm from main #1847
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Found by Brent using ASan, thank you!
…d yielded values are only used within the coroutine's lifetime. I think validating this was an oversight from the bringup of coroutines. I discovered this while writing test cases for coroutine lifetime extension. I realized it was possible to write a test case that should have triggered this but was not. I added some tests to make sure that we continue to flag this in the future. rdar://69597888
This check did not handle MemberRefExprs with an InOutExpr base, giving it inconsistent behavior: - With a class, we would diagnose self-assignment of computed properties - With a struct, accesses to computed properties would build a MemberRefExpr with an InOutExpr base, so self-assignments were *not* diagnosed. Let's tweak the check to consistently diagnose self-assignments to stored properties only, instead of the emergent behavior as described above.
We used to wrap the base expression in an InOutExpr when accessing a computed property. This was a vestigial remnant of differences in the SILGen code paths for stored vs computed property access. These days SILGen doesn't care and is perfectly happy to call getters and setters with an LValueType base as well. This allows us to remove the call to getAccessSemantics(), which for a 'didSet', had to kick off type checking of the body. Fixes <rdar://problem/69532933>.
Also remove the unused AccessSemantics parameter.
…antics-cycle Sema: Simplify adjustSelfTypeForMember() a little bit to avoid a cycle
…94d3a737baacc1c4b6d8303 [ownership] Teach the ownership verifier how to verify that guaranteed yielded values are only used within the coroutine's lifetime.
…fixits-use-after-free [Type checker] Eliminate a use-after-free due to C++ temporaries.
…-sil-async [Concurrency] (De-)mangling for SIL @async function types.
MaxDesiatov
approved these changes
Sep 26, 2020
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