Rollup merge of rust-lang#128557 - nyurik:dup-init, r=compiler-errors

chore: use shorthand initializer

Tiny readability improvement - don't use redundant initializer vars

Author: jieyouxu

compiler/rustc_builtin_macros/src/alloc_error_handler.rs

@@ -80,7 +80,7 @@ fn generate_handler(cx: &ExtCtxt<'_>, handler: Ident, span: Span, sig_span: Span
     let params = thin_vec![cx.param(span, size, ty_usize.clone()), cx.param(span, align, ty_usize)];
     let decl = cx.fn_decl(params, never);
     let header = FnHeader { safety: Safety::Unsafe(span), ..FnHeader::default() };
-    let sig = FnSig { decl, header, span: span };
+    let sig = FnSig { decl, header, span };
 
     let body = Some(cx.block_expr(call));
     let kind = ItemKind::Fn(Box::new(Fn {

compiler/rustc_query_system/src/query/job.rs

@@ -588,7 +588,7 @@ pub fn report_cycle<'a>(
         cycle_stack,
         stack_bottom: stack[0].query.description.to_owned(),
         alias,
-        cycle_usage: cycle_usage,
+        cycle_usage,
         stack_count,
         note_span: (),
     };