Auto merge of #120335 - matthiaskrgr:rollup-2a0y3rd, r=matthiaskrgr

Rollup of 10 pull requests

Successful merges:

 - #119305 (Add `AsyncFn` family of traits)
 - #119389 (Provide more context on recursive `impl` evaluation overflow)
 - #119895 (Remove `track_errors` entirely)
 - #120230 (Assert that a single scope is passed to `for_scope`)
 - #120278 (Remove --fatal-warnings on wasm targets)
 - #120292 (coverage: Dismantle `Instrumentor` and flatten span refinement)
 - #120315 (On E0308 involving `dyn Trait`, mention trait objects)
 - #120317 (pattern_analysis: Let `ctor_sub_tys` return any Iterator they want)
 - #120318 (pattern_analysis: Reuse most of the `DeconstructedPat` `Debug` impl)
 - #120325 (rustc_data_structures: use either instead of itertools)

r? `@ghost`
`@rustbot` modify labels: rollup

Cargo.lock

@@ -3654,10 +3654,10 @@ version = "0.0.0"
 dependencies = [
  "arrayvec",
  "bitflags 2.4.1",
+ "either",
  "elsa",
  "ena",
  "indexmap",
- "itertools",
  "jobserver",
  "libc",
  "measureme",

compiler/rustc_data_structures/Cargo.toml

@@ -7,10 +7,10 @@ edition = "2021"
 # tidy-alphabetical-start
 arrayvec = { version = "0.7", default-features = false }
 bitflags = "2.4.1"
+either = "1.0"
 elsa = "=1.7.1"
 ena = "0.14.2"
 indexmap = { version = "2.0.0" }
-itertools = "0.11"
 jobserver_crate = { version = "0.1.27", package = "jobserver" }
 libc = "0.2"
 measureme = "11"

compiler/rustc_data_structures/src/sharded.rs

@@ -3,7 +3,7 @@ use crate::fx::{FxHashMap, FxHasher};
 use crate::sync::{is_dyn_thread_safe, CacheAligned};
 use crate::sync::{Lock, LockGuard, Mode};
 #[cfg(parallel_compiler)]
-use itertools::Either;
+use either::Either;
 use std::borrow::Borrow;
 use std::collections::hash_map::RawEntryMut;
 use std::hash::{Hash, Hasher};

compiler/rustc_data_structures/src/sso/map.rs

@@ -1,6 +1,6 @@
 use crate::fx::FxHashMap;
 use arrayvec::ArrayVec;
-use itertools::Either;
+use either::Either;
 use std::fmt;
 use std::hash::Hash;
 use std::ops::Index;

compiler/rustc_hir/src/lang_items.rs

@@ -208,6 +208,10 @@ language_item_table! {
     FnMut,                   sym::fn_mut,              fn_mut_trait,               Target::Trait,          GenericRequirement::Exact(1);
     FnOnce,                  sym::fn_once,             fn_once_trait,              Target::Trait,          GenericRequirement::Exact(1);
 
+    AsyncFn,                 sym::async_fn,            async_fn_trait,             Target::Trait,          GenericRequirement::Exact(1);
+    AsyncFnMut,              sym::async_fn_mut,        async_fn_mut_trait,         Target::Trait,          GenericRequirement::Exact(1);
+    AsyncFnOnce,             sym::async_fn_once,       async_fn_once_trait,        Target::Trait,          GenericRequirement::Exact(1);
+
     FnOnceOutput,            sym::fn_once_output,      fn_once_output,             Target::AssocTy,        GenericRequirement::None;
 
     Iterator,                sym::iterator,            iterator_trait,             Target::Trait,          GenericRequirement::Exact(0);