fix: Dereferencing freed memos when verifying provisional memos#788
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## Summary Update Salsa to pull in salsa-rs/salsa#788 which fixes the, by now, famous *access to field whilst the value is being initialized*. This PR also re-enables all tests that previously triggered the panic. ## Test Plan `cargo test`
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Fixes #785
The root cause of #785 is that Salsa tries to load the memo of a cycle head that is stored on a tracked struct that has been freed.
The main problem is that we tried to verify
validate_provisionaleven in cases where the query is from a past revision, in which case we can't trust any inputs to still exist (and be valid).The fix in this PR is to change the order in which
shallow_verifyandvalidate_provisionalare called. This requires extracting the mutating bits out ofshallow_verifybecause we only want to call those if the struct isn't provisional (at least, that's what we did before and I tried to preserve this behavior).