subtree-push nightly-2025-04-02

[ytmimi]

Bumping the toolchain version as part of a git subtree push

current toolchain (nightly-2025-01-02):

• 1.85.0-nightly (45d11e51b 2025-01-01)

latest toolchain (nightly-2025-04-02):

• 1.88.0-nightly (e2014e876 2025-04-01)

[ytmimi]

Diff Check Job

Edit: Check Failed ❌

[ytmimi]

Diff Check failures in more detail:

Feature: #![feature(where_clause_attrs)]

• Tracking issue: Tracking Issue for attributes on where-clause bounds rust#115590
• PR: Implement #[cfg] in where clauses rust#132388

         #[cfg = b]
         /* block comment after the attribute */
         U: TraitB,
-        #[cfg = a] // short
+        #[cfg = a]
+        // short
         U: TraitA,
-        #[cfg = b] /* short */ U: TraitB;
+        #[cfg = b]
+        /* short */
+        U: TraitB;

---

Bugfix: Do not yeet unsafe<> from type

• PR: Do not yeet unsafe<> from type when formatting unsafe binder rust#137769

-fn empty() -> unsafe<> () {}
+fn empty() -> () {}

---

Feature: #![feature(pin_ergonomics)]

• Tracking issue: Tracking issue for pin ergonomics rust#130494
• PR: Implement &pin const self and &pin mut self sugars rust#135733

-fn f(x: &pin  const i32) {}
-fn g<'a>(x: &  'a pin const  i32) {}
-fn h<'a>(x: &  'a pin  
-mut i32) {}
-fn i(x: &pin      mut  i32) {}
+fn f(x: &pin const i32) {}
+fn g<'a>(x: &'a pin const i32) {}
+fn h<'a>(x: &'a pin mut i32) {}
+fn i(x: &pin mut i32) {}

---

Parse Error: src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/record_pat_field_list.rs

• Not sure which commit lead to the code no longer parsing.

rustfmt 1.8.0-nightly (f371e16 2025-04-01) produces this diff:

 fn foo() {
     let S {} = ();
     let S { f, ref mut g } = ();
-    let S { h: _, ..} = ();
-    let S { h: _, } = ();
-    let S { #[cfg(any())] .. } = ();
+    let S { h: _, .. } = ();
+    let S { h: _ } = ();
+    let S { .. } = ();
 }

This PR's rustfmt can't parse the code:

error: expected identifier, found `..`
 --> <stdin>:6:27
  |
6 |     let S { #[cfg(any())] .. } = ();
  |         -                 ^^ expected identifier
  |         |
  |         while parsing the fields for this pattern

---

Parse Error: src/tools/rust-analyzer/crates/parser/test_data/parser/inline/ok/const_block_pat.rs

• Not sure which commit lead to the code no longer parsing.

rustfmt 1.8.0-nightly (f371e16 2025-04-01) produces this diff:

 fn main() {
     let const { 15 } = ();
-    let const { foo(); bar() } = ();
+    let const {
+        foo();
+        bar()
+    } = ();
 
     match 42 {
-        const { 0 } .. const { 1 } => (),
-        .. const { 0 } => (),
-        const { 2 } .. => (),
+        const { 0 }..const { 1 } => (),
+        ..const { 0 } => (),
+        const { 2 }.. => (),
     }

This PR's rustfmt can't parse the code:

error: `inline_const_pat` has been removed
 --> <stdin>:2:15
  |
2 |     let const { 15 } = ();
  |               ^^^^^^
  |
  = help: use a named `const`-item or an `if`-guard instead

[ytmimi]

Given that the Diff-Check failed because of unstable feature, bug fixes implemented in the r-l/r tree, and code that no longer compiles we should be good to go here.