rust/compiler/rustc_ty_utils
Matthias Krüger 3cf567e3c0
Rollup merge of #127136 - compiler-errors:coroutine-closure-env-shim, r=oli-obk
Fix `FnMut::call_mut`/`Fn::call` shim for async closures that capture references

I adjusted async closures to be able to implement `Fn` and `FnMut` *even if* they capture references, as long as those references did not need to borrow data from the closure captures themselves. See #125259.

However, when I did this, I didn't actually relax an assertion in the `build_construct_coroutine_by_move_shim` shim code, which builds the `Fn`/`FnMut`/`FnOnce` implementations for async closures. Therefore, if we actually tried to *call* `FnMut`/`Fn` on async closures, it would ICE.

This PR adjusts this assertion to ensure that we only capture immutable references in closures if they implement `Fn`/`FnMut`. It also adds a bunch of tests and makes more of the async-closure tests into `build-pass` since we often care about these tests actually generating the right closure shims and stuff. I think it might be excessive to *always* use build-pass here, but 🤷 it's not that big of a deal.

Fixes #127019
Fixes #127012

r? oli-obk
2024-07-02 17:47:46 +02:00
..
src Rollup merge of #127136 - compiler-errors:coroutine-closure-env-shim, r=oli-obk 2024-07-02 17:47:46 +02:00
Cargo.toml bump itertools to 0.12 2024-03-08 12:34:05 +03:00
messages.ftl s/generator/coroutine/ 2023-10-20 21:14:01 +00:00