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Matthias Krüger
b8b2a65035
make the const-unstable-in-stable error more clear The default should be to add `rustc_const_unstable`, not `rustc_allow_const_fn_unstable`. Also I discovered our check for missing const stability attributes on stable functions -- but strangely that check only kicks in for "reachable" functions. `check_missing_stability` checks for reachability since all reachable functions must have a stability attribute, but I would say if a function has `#[stable]` it should also have const-stability attributes regardless of reachability.