alloc: reduce code in unsafe blocks

[DanielEScherzer]

No description provided.

[rust-log-analyzer]

The job tidy failed! Check out the build log: (web) (plain enhanced) (plain)

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downloading https://static.rust-lang.org/dist/2026-08-30/rustc-nightly-x86_64-unknown-linux-gnu.tar.xz
extracting /checkout/obj/build/cache/2026-08-30/rustc-nightly-x86_64-unknown-linux-gnu.tar.xz to /checkout/obj/build/x86_64-unknown-linux-gnu/rustfmt
[TIMING:end] format::InternalRustfmt {  } -- 12.797
Diff in /checkout/library/alloc/src/collections/vec_deque/iter_mut.rs:213:
         if idx < i1_len {
             // SAFETY: The TrustedRandomAccess contract requires that callers only pass an index
             // that is in bounds.
-            unsafe {
-                self.i1.__iterator_get_unchecked(idx)
-            }
+            unsafe { self.i1.__iterator_get_unchecked(idx) }
         } else {
             // SAFETY: The TrustedRandomAccess contract requires that callers only pass an index
             // that is in bounds.
Diff in /checkout/library/alloc/src/collections/vec_deque/iter_mut.rs:222:
-            unsafe {
-                self.i2.__iterator_get_unchecked(idx - i1_len)
-            }
+            unsafe { self.i2.__iterator_get_unchecked(idx - i1_len) }
         }
     }
 }
Diff in /checkout/library/alloc/src/collections/vec_deque/iter.rs:149:
         if idx < i1_len {
             // SAFETY: The TrustedRandomAccess contract requires that callers only pass an index
             // that is in bounds.
-            unsafe {
-                self.i1.__iterator_get_unchecked(idx)
-            }
+            unsafe { self.i1.__iterator_get_unchecked(idx) }
         } else {
             // SAFETY: The TrustedRandomAccess contract requires that callers only pass an index
             // that is in bounds.
Diff in /checkout/library/alloc/src/collections/vec_deque/iter.rs:158:
-            unsafe {
-                self.i2.__iterator_get_unchecked(idx - i1_len)
-            }
+            unsafe { self.i2.__iterator_get_unchecked(idx - i1_len) }
         }
     }
 }
error: closure bodies that contain statements must be surrounded by braces
##[error]   --> /checkout/library/alloc/src/collections/vec_deque/mod.rs:636:48
    |
636 |         iter.enumerate().for_each(|(i, element)|
    |                                                ^
...
641 |         );
    |         ^
    |
note: statement found outside of a block
   --> /checkout/library/alloc/src/collections/vec_deque/mod.rs:640:26
    |
637 | /             unsafe {
638 | |                 self.buffer_write(dst.add(i), element);
639 | |             }
640 | |             *written += 1;
    | |                         -^ this `;` turns the preceding closure into a statement
    | |_________________________|
    |                           this expression is a statement because of the trailing semicolon
note: the closure body may be incorrectly delimited
   --> /checkout/library/alloc/src/collections/vec_deque/mod.rs:636:35
    |
636 |           iter.enumerate().for_each(|(i, element)|
    |  ___________________________________^
637 | |             unsafe {
638 | |                 self.buffer_write(dst.add(i), element);
639 | |             }
640 | |             *written += 1;
    | |_________________________^ this is the parsed closure...
641 |           );
    |           - ...but likely you meant the closure to end here
help: try adding braces
    |
636 ~         iter.enumerate().for_each(|(i, element)| {
637 |             unsafe {
...
640 |             *written += 1;
641 ~         });
    |

Diff in /checkout/library/alloc/src/boxed/convert.rs:720:
         if self.is::<T>() {
             let raw: *mut dyn Error = Box::into_raw(self);
             // SAFETY: Check ensures the type is correct.
-            unsafe {
-                Ok(Box::from_raw(raw as *mut T))
-            }
+            unsafe { Ok(Box::from_raw(raw as *mut T)) }
         } else {
             Err(self)
         }
fmt: checked 7212 files
Bootstrap failed while executing `test src/tools/tidy tidyselftest --extra-checks=py,cpp,js,spellcheck`