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-rw-r--r--compiler/rustc_middle/src/traits/mod.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_middle/src/traits/mod.rs b/compiler/rustc_middle/src/traits/mod.rs
index 1340e674568..eef193a657d 100644
--- a/compiler/rustc_middle/src/traits/mod.rs
+++ b/compiler/rustc_middle/src/traits/mod.rs
@@ -378,6 +378,9 @@ pub enum ObligationCauseCode<'tcx> {
     /// `start` has wrong type
     StartFunctionType,
 
+    /// language function has wrong type
+    LangFunctionType(Symbol),
+
     /// Intrinsic has wrong type
     IntrinsicType,