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Add comment to explain why we change the layout for Projection #61193

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Merged
merged 1 commit into from
May 26, 2019
Merged

Add comment to explain why we change the layout for Projection #61193

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2 changes: 2 additions & 0 deletions src/librustc_mir/interpret/operand.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -475,6 +475,8 @@ impl<'a, 'mir, 'tcx, M: Machine<'a, 'mir, 'tcx>> InterpretCx<'a, 'mir, 'tcx, M>
PlaceBase::Local(mir::RETURN_PLACE) => return err!(ReadFromReturnPointer),
PlaceBase::Local(local) => {
// FIXME use place_projection.is_empty() when is available
// Do not use the layout passed in as argument if the base we are looking at
// here is not the entire place.
let layout = if let Place::Base(_) = mir_place {
layout
} else {
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