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-rw-r--r--src/librustc_mir/interpret/eval_context.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustc_mir/interpret/eval_context.rs b/src/librustc_mir/interpret/eval_context.rs
index 0a23e056931..ea895c35fe5 100644
--- a/src/librustc_mir/interpret/eval_context.rs
+++ b/src/librustc_mir/interpret/eval_context.rs
@@ -254,7 +254,7 @@ impl<'a, 'tcx, M: Machine<'tcx>> EvalContext<'a, 'tcx, M> {
             }
 
             Aggregate(..) |
-            Variant(_) => unimplemented!(),
+            Variant(_) => bug!("should not have aggregate or variant constants in MIR"),
             // function items are zero sized and thus have no readable value
             Function(..) => PrimVal::Undef,
         };