Rollup of 6 pull requests

[matthiaskrgr]

Successful merges:

• Tweak parsing recovery of enums, for exprs and match arm patterns #117565 (Tweak parsing recovery of enums, for exprs and match arm patterns)
• Name explicit registers in conflict register errors for inline assembly #117912 (Name explicit registers in conflict register errors for inline assembly)
• Add never_patterns feature gate #118157 (Add never_patterns feature gate)
• also add is_empty to const raw slices #118231 (also add is_empty to const raw slices)
• Pretty print Fn<(..., ...)> trait refs with parentheses (almost) always #118268 (Pretty print Fn<(..., ...)> trait refs with parentheses (almost) always)
• Print list of missing target features when calling a function with target features outside an unsafe block #118333 (Print list of missing target features when calling a function with target features outside an unsafe block)

Failed merges:

• Suggest let or == on typo'd let-chain #118191 (Suggest let or == on typo'd let-chain)

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

[matthiaskrgr]

@bors r+ rollup=never p=7

[bors]

📌 Commit 3cd61b2 has been approved by matthiaskrgr

It is now in the queue for this repository.

[rust-log-analyzer]

The job x86_64-gnu-llvm-16 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

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GITHUB_EVENT_NAME=pull_request
GITHUB_EVENT_PATH=/home/runner/work/_temp/_github_workflow/event.json
GITHUB_GRAPHQL_URL=https://api.github.com/graphql
GITHUB_HEAD_REF=rollup-cj3vhgd
GITHUB_JOB=pr
GITHUB_PATH=/home/runner/work/_temp/_runner_file_commands/add_path_b0527b97-b1c4-4b25-b0de-37f1af9673d7
GITHUB_REF=refs/pull/118432/merge
GITHUB_REF_NAME=118432/merge
GITHUB_REF_PROTECTED=false
---

---- [ui] tests/ui/pattern/pattern-bad-ref-box-order.rs stdout ----
diff of stderr:

4 LL |         Some(ref box _i) => {},
5    |              ^^^^^^^ help: swap them: `box ref`
- error: aborting due to 1 previous error
- error: aborting due to 1 previous error
+ error: expected one of `)`, `,`, or `|`, found `_i`
+    |
+    |
+ LL |         Some(ref box _i) => {},
+    |                     -^^ expected one of `)`, `,`, or `|`
+    |                     help: missing `,`
8 
+ error[E0023]: this pattern has 2 fields, but the corresponding tuple variant has 1 field
+   --> $DIR/pattern-bad-ref-box-order.rs:8:22
+   --> $DIR/pattern-bad-ref-box-order.rs:8:22
+    |
+ LL |         Some(ref box _i) => {},
+    |                      ^^ expected 1 field, found 2
+   --> $SRC_DIR/core/src/option.rs:LL:COL
+    = note: tuple variant has 1 field
+ 
+ error: aborting due to 3 previous errors
+ 
---
Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/pattern/pattern-bad-ref-box-order/pattern-bad-ref-box-order.stderr
diff of fixed:

5 
6 fn foo(f: Option<Box<i32>>) {
7     match f {
-         Some(box ref _i) => {},
+         Some(box ref, _i) => {},
9         //~^ ERROR switch the order of `ref` and `box`
11     }


The actual fixed differed from the expected fixed.
---
status: exit status: 1
command: RUSTC_ICE="0" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/pattern/pattern-bad-ref-box-order.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "--sysroot" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/pattern/pattern-bad-ref-box-order" "-A" "unused" "-A" "internal_features" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/pattern/pattern-bad-ref-box-order/auxiliary"
stdout: none
--- stderr -------------------------------
error: switch the order of `ref` and `box`
   |
   |
LL |         Some(ref box _i) => {},
   |              ^^^^^^^ help: swap them: `box ref`

error: expected one of `)`, `,`, or `|`, found `_i`
   |
   |
LL |         Some(ref box _i) => {},
   |                     -^^ expected one of `)`, `,`, or `|`
   |                     help: missing `,`

error[E0023]: this pattern has 2 fields, but the corresponding tuple variant has 1 field
##[error]  --> /checkout/tests/ui/pattern/pattern-bad-ref-box-order.rs:8:22
##[error]  --> /checkout/tests/ui/pattern/pattern-bad-ref-box-order.rs:8:22
   |
LL |         Some(ref box _i) => {},
   |                      ^^ expected 1 field, found 2
  --> /rustc/FAKE_PREFIX/library/core/src/option.rs:578:56
   = note: tuple variant has 1 field

error: aborting due to 3 previous errors