Update rust toolchain to nightly-2023-09-21 (vercel/turborepo#6002)

This:

- Updates to the latest api change for `StdError` in
`error_generic_member_access` rust-lang/rust#99301
- Updates `pathfinder_simd` for compatiblity
- Updates other crates for compatibility with Next.js


Closes WEB-1635

Author: wbinnssmith

Diff for: crates/turbo-tasks-macros/src/lib.rs

@@ -1,3 +1,4 @@
+#![allow(internal_features)]
 #![feature(proc_macro_diagnostic)]
 #![feature(allow_internal_unstable)]
 #![feature(box_patterns)]

Diff for: crates/turbo-tasks/src/backend.rs

@@ -2,7 +2,7 @@ use std::{
     any::Any,
     borrow::Cow,
     fmt,
-    fmt::{Debug, Display},
+    fmt::{Debug, Display, Write},
     future::Future,
     pin::Pin,
     sync::Arc,
@@ -383,11 +383,14 @@ impl PersistentTaskType {
                 }
                 Err(name) => {
                     if !this_value.has_trait(trait_type) {
-                        let traits = this_value
-                            .traits()
-                            .iter()
-                            .map(|t| format!(" {}", t))
-                            .collect::<String>();
+                        let traits =
+                            this_value
+                                .traits()
+                                .iter()
+                                .fold(String::new(), |mut out, t| {
+                                    let _ = write!(out, " {}", t);
+                                    out
+                                });
                         Err(anyhow!(
                             "{} doesn't implement {} (only{})",
                             this_value,

Diff for: crates/turbo-tasks/src/lib.rs

@@ -29,7 +29,6 @@
 #![deny(unsafe_op_in_unsafe_fn)]
 #![feature(result_flattening)]
 #![feature(error_generic_member_access)]
-#![feature(provide_any)]
 #![feature(new_uninit)]
 #![feature(arbitrary_self_types)]
 #![feature(async_fn_in_trait)]

Diff for: crates/turbo-tasks/src/manager.rs

@@ -1341,7 +1341,7 @@ pub fn with_turbo_tasks<T>(func: impl FnOnce(&Arc<dyn TurboTasksApi>) -> T) -> T
 }
 
 pub fn weak_turbo_tasks() -> Weak<dyn TurboTasksApi> {
-    TURBO_TASKS.with(|arc| Arc::downgrade(arc))
+    TURBO_TASKS.with(Arc::downgrade)
 }
 
 pub fn with_turbo_tasks_for_testing<T>(

Diff for: crates/turbo-tasks/src/util.rs

@@ -38,7 +38,7 @@ impl StdError for SharedError {
         self.inner.source()
     }
 
-    fn provide<'a>(&'a self, req: &mut std::any::Demand<'a>) {
+    fn provide<'a>(&'a self, req: &mut std::error::Request<'a>) {
         self.inner.provide(req);
     }
 }

Diff for: crates/turbopack-cli-utils/src/issue.rs

@@ -397,15 +397,9 @@ impl IssueReporter for ConsoleUi {
             let category = &plain_issue.category;
             let title = &plain_issue.title;
             let processing_path = &*plain_issue.processing_path;
-            let severity_map = grouped_issues
-                .entry(severity)
-                .or_insert_with(Default::default);
-            let category_map = severity_map
-                .entry(category.clone())
-                .or_insert_with(Default::default);
-            let issues = category_map
-                .entry(context_path.to_string())
-                .or_insert_with(Default::default);
+            let severity_map = grouped_issues.entry(severity).or_default();
+            let category_map = severity_map.entry(category.clone()).or_default();
+            let issues = category_map.entry(context_path.to_string()).or_default();
 
             let mut styled_issue = if let Some(source) = &plain_issue.source {
                 let mut styled_issue = format!(

Diff for: crates/turbopack-convert-trace/src/main.rs

@@ -599,7 +599,7 @@ fn main() {
                                             );
                                             add_to_span_counter();
                                         } else {
-                                            let group = groups.entry(key).or_insert_with(Vec::new);
+                                            let group = groups.entry(key).or_default();
                                             if !group.is_empty() {
                                                 add_to_span_counter();
                                             }

Diff for: crates/turbopack-core/src/issue/mod.rs

@@ -391,7 +391,7 @@ impl CapturedIssues {
             })
             .try_join()
             .await?;
-        list.sort_by(|a, b| ReadRef::ptr_cmp(a, b));
+        list.sort_by(ReadRef::ptr_cmp);
         Ok(list)
     }
 }

Diff for: crates/turbopack-dev/src/ecmascript/list/content.rs

@@ -93,18 +93,15 @@ impl EcmascriptDevChunkListContent {
 
         let by_merger = by_merger
             .into_iter()
-            .map(|(merger, contents)| {
-                let merger = merger;
-                async move {
-                    Ok((
-                        merger,
-                        merger
-                            .merge(Vc::cell(contents))
-                            .version()
-                            .into_trait_ref()
-                            .await?,
-                    ))
-                }
+            .map(|(merger, contents)| async move {
+                Ok((
+                    merger,
+                    merger
+                        .merge(Vc::cell(contents))
+                        .version()
+                        .into_trait_ref()
+                        .await?,
+                ))
             })
             .try_join()
             .await?

Diff for: crates/turbopack-ecmascript/src/analyzer/mod.rs

@@ -3,7 +3,7 @@
 use std::{
     borrow::Cow,
     cmp::Ordering,
-    fmt::Display,
+    fmt::{Display, Write},
     future::Future,
     hash::{Hash, Hasher},
     mem::take,
@@ -1044,10 +1044,10 @@ impl JsValue {
         let explainer = pretty_join(&args, 0, ", ", ",", "");
         (
             explainer,
-            hints
-                .into_iter()
-                .map(|h| format!("\n{h}"))
-                .collect::<String>(),
+            hints.into_iter().fold(String::new(), |mut out, h| {
+                let _ = write!(out, "\n{h}");
+                out
+            }),
         )
     }
 
@@ -1056,10 +1056,10 @@ impl JsValue {
         let explainer = self.explain_internal(&mut hints, 0, depth, unknown_depth);
         (
             explainer,
-            hints
-                .into_iter()
-                .map(|h| format!("\n{h}"))
-                .collect::<String>(),
+            hints.into_iter().fold(String::new(), |mut out, h| {
+                let _ = write!(out, "\n{h}");
+                out
+            }),
         )
     }
 

Diff for: xtask/src/publish.rs

@@ -249,8 +249,8 @@ pub fn run_bump(names: HashSet<String>, dry_run: bool) {
         .collect::<Vec<PackageJson>>();
     let mut workspaces_to_bump = workspaces
         .iter()
+        .filter(|&p| names.contains(&p.name))
         .cloned()
-        .filter(|p| names.contains(&p.name))
         .collect::<Vec<_>>();
     if workspaces_to_bump.is_empty() {
         fn name_to_title(package: &PackageJson) -> String {