Rustc changes for permissive provenance

compiler/rustc_mir_transform/src/const_prop.rs

@@ -28,7 +28,8 @@ use crate::MirPass;
 use rustc_const_eval::interpret::{
     self, compile_time_machine, AllocId, ConstAllocation, ConstValue, CtfeValidationMode, Frame,
     ImmTy, Immediate, InterpCx, InterpResult, LocalState, LocalValue, MemPlace, MemoryKind, OpTy,
-    Operand as InterpOperand, PlaceTy, Scalar, ScalarMaybeUninit, StackPopCleanup, StackPopUnwind,
+    Operand as InterpOperand, PlaceTy, Pointer, Scalar, ScalarMaybeUninit, StackPopCleanup,
+    StackPopUnwind,
 };
 
 /// The maximum number of bytes that we'll allocate space for a local or the return value.
@@ -285,6 +286,14 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for ConstPropMachine<'mir, 'tcx>
         Ok(())
     }
 
+    #[inline(always)]
+    fn expose_ptr(
+        _ecx: &mut InterpCx<'mir, 'tcx, Self>,
+        _ptr: Pointer<AllocId>,
+    ) -> InterpResult<'tcx> {
+        throw_machine_stop_str!("exposing pointers isn't supported in ConstProp")
+    }
+
     #[inline(always)]
     fn init_frame_extra(
         _ecx: &mut InterpCx<'mir, 'tcx, Self>,