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-rw-r--r--compiler/rustc_middle/src/mir/interpret/allocation.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/mir/interpret/allocation.rs b/compiler/rustc_middle/src/mir/interpret/allocation.rs
index f17747558fc..dd55d039794 100644
--- a/compiler/rustc_middle/src/mir/interpret/allocation.rs
+++ b/compiler/rustc_middle/src/mir/interpret/allocation.rs
@@ -512,7 +512,7 @@ impl Allocation {
     pub fn adjust_from_tcx<'tcx, Prov: Provenance, Bytes: AllocBytes>(
         &self,
         cx: &impl HasDataLayout,
-        mut alloc_bytes: impl FnMut(&[u8], Align) -> InterpResult<'tcx, Bytes>,
+        alloc_bytes: impl FnOnce(&[u8], Align) -> InterpResult<'tcx, Bytes>,
         mut adjust_ptr: impl FnMut(Pointer<CtfeProvenance>) -> InterpResult<'tcx, Pointer<Prov>>,
     ) -> InterpResult<'tcx, Allocation<Prov, (), Bytes>> {
         // Copy the data.