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Rollup merge of #92242 - compiler-errors:layout-modulo-regions, r=matthewjasper

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Erase regions before calculating layout for packed field capture

Self-explanatory. We just erase region inferencing because we don't need that for layout computation... Q: layouts are always equal modulo regions, right?

Fixes #92240
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Matthias Krüger 2022-02-11 07:48:02 +01:00 committed by GitHub
commit 664255b168
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1 changed files with 2 additions and 1 deletions
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compiler/rustc_typeck/src/check/upvar.rs
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@ -1648,7 +1648,8 @@ fn restrict_repr_packed_field_ref_capture<'tcx>(
match p.kind {
ProjectionKind::Field(..) => match ty.kind() {
ty::Adt(def, _) if def.repr.packed() => {
match tcx.layout_of(param_env.and(p.ty)) {
// We erase regions here because they cannot be hashed
match tcx.layout_of(param_env.and(tcx.erase_regions(p.ty))) {
Ok(layout) if layout.align.abi.bytes() == 1 => {
// if the alignment is 1, the type can't be further
// disaligned.