Matthias Krüger
edcdab08a4
Rollup merge of #108033 - lcnr:coinductive-attr, r=compiler-errors ...
add an unstable `#[rustc_coinductive]` attribute
useful to test coinduction, especially in the new solver.
as this attribute should remain permanently unstable I don't think this needs any official approval. cc ``@rust-lang/types``
had to weaken the check for stable query results in the solver to prevent an ICE if there's a coinductive cycle with constraints.
r? ``@compiler-errors``
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edcdab08a4