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-rw-r--r--compiler/rustc_const_eval/src/interpret/eval_context.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_const_eval/src/interpret/eval_context.rs b/compiler/rustc_const_eval/src/interpret/eval_context.rs
index d13fed7a9c2..c8bf769cfd8 100644
--- a/compiler/rustc_const_eval/src/interpret/eval_context.rs
+++ b/compiler/rustc_const_eval/src/interpret/eval_context.rs
@@ -639,7 +639,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
             }
 
             ty::Slice(_) | ty::Str => {
-                let len = metadata.unwrap_meta().to_machine_usize(self)?;
+                let len = metadata.unwrap_meta().to_target_usize(self)?;
                 let elem = layout.field(self, 0);
 
                 // Make sure the slice is not too big.