---

yaml
---
r: 282025
b: refs/heads/stable
c: ccc5e07
h: refs/heads/master
i:
  282023: 6931641

Author: eddyb

[refs]

@@ -29,7 +29,7 @@ refs/heads/tmp: e06d2ad9fcd5027bcaac5b08fc9aa39a49d0ecd3
 refs/tags/1.0.0-alpha.2: 4c705f6bc559886632d3871b04f58aab093bfa2f
 refs/tags/homu-tmp: 3c795e08d6f4a532f12f3f8e1837db5e0647f8b0
 refs/tags/1.0.0-beta: 8cbb92b53468ee2b0c2d3eeb8567005953d40828
-refs/heads/stable: 1de6a9682f16a893cd5651db28e26a1cd92fd459
+refs/heads/stable: ccc5e0732a95861de755cf14bec05d873bfa7481
 refs/tags/1.0.0: 55bd4f8ff2b323f317ae89e254ce87162d52a375
 refs/tags/1.1.0: bc3c16f09287e5545c1d3f76b7abd54f2eca868b
 refs/tags/1.2.0: f557861f822c34f07270347b94b5280de20a597e

branches/stable/src/librustc_mir/build/expr/as_rvalue.rs

@@ -73,8 +73,13 @@ impl<'a,'tcx> Builder<'a,'tcx> {
                 })
             }
             ExprKind::Cast { source } => {
-                let source = unpack!(block = this.as_operand(block, source));
-                block.and(Rvalue::Cast(CastKind::Misc, source, expr.ty))
+                let source = this.hir.mirror(source);
+                if source.ty == expr.ty {
+                    this.expr_as_rvalue(block, source)
+                } else {
+                    let source = unpack!(block = this.as_operand(block, source));
+                    block.and(Rvalue::Cast(CastKind::Misc, source, expr.ty))
+                }
             }
             ExprKind::ReifyFnPointer { source } => {
                 let source = unpack!(block = this.as_operand(block, source));