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-rw-r--r--compiler/rustc_middle/src/traits/mod.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/traits/mod.rs b/compiler/rustc_middle/src/traits/mod.rs
index 135680b9349..894acf3c2aa 100644
--- a/compiler/rustc_middle/src/traits/mod.rs
+++ b/compiler/rustc_middle/src/traits/mod.rs
@@ -292,6 +292,8 @@ pub enum ObligationCauseCode<'tcx> {
     SizedArgumentType(Option<hir::HirId>),
     /// Return type must be `Sized`.
     SizedReturnType,
+    /// Return type of a call expression must be `Sized`.
+    SizedCallReturnType,
     /// Yield type must be `Sized`.
     SizedYieldType,
     /// Inline asm operand type must be `Sized`.