Require a box expression's type to be Sized

2021-08-20 16:25:52 +02:00
parent ba83b39d4e
commit b8fff95961
4 changed files with 7 additions and 3 deletions
--- a/compiler/rustc_middle/src/traits/mod.rs
+++ b/compiler/rustc_middle/src/traits/mod.rs
@@ -225,6 +225,8 @@ pub enum ObligationCauseCode<'tcx> {
    SizedReturnType,
    /// Yield type must be `Sized`.
    SizedYieldType,
+    /// Box expression result type must be `Sized`.
+    SizedBoxType,
    /// Inline asm operand type must be `Sized`.
    InlineAsmSized,
    /// `[T, ..n]` implies that `T` must be `Copy`.