add an initial Gc<T> stub with the API
#10576
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src/libstd/gc.rs
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"A Freeze bound would also work"?
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This isn't very useful yet, but it does replace most functionality of `@T`. The `Mut<T>` type will make it unnecessary to have a `GcMut<T>` so I haven't included one. Obviously it doesn't work for trait objects but that needs to be figured out for `Rc<T>` too.
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Build quine-mc_cluskey with `opt-level=3` in dev builds While doing some profiling I noticed that debug clippy running on the `clippy_lints` crate spends 35s out of 160s in one specific code path of `nonminimal_bool`, which seemed a bit excessive. I've found that just enabling optimizations for quine-mc_cluskey (used by nonminimal_bool) cuts down the part that took 35s to 3s While this doesn't really change anything for users, this helps dogfood a bit as it cuts off about half a minute of runtime (in some of my tests, at least). Something similar was attempted in rust-lang#10576, however that involved compiling everything in release mode including clippy itself, whereas this only affects a single dependency that's compiled in parallel with something that takes longer so this should hopefully not have a negative impact in any case (and changing clippy doesn't require recompiling that dependency) changelog: none
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This isn't very useful yet, but it does replace most functionality of
@T. TheMut<T>type will make it unnecessary to have aGcMut<T>so I haven't included one. Obviously it doesn't work for trait objects but that needs to be figured out forRc<T>too.