bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Layout of &dyn Trait<[type error]> is still wide

Browse source
This commit is contained in:
Michael Goulet 2023-03-13 21:35:15 +00:00
parent f1b1ed7e18
commit 0bb876ebe7
4 changed files with 32 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

6
compiler/rustc_ty_utils/src/layout.rs
View file

@ -156,7 +156,11 @@ fn layout_of_uncached<'tcx>(
let unsized_part = tcx.struct_tail_erasing_lifetimes(pointee, param_env);
let metadata = if let Some(metadata_def_id) = tcx.lang_items().metadata_type() {
let metadata = if let Some(metadata_def_id) = tcx.lang_items().metadata_type()
// Projection eagerly bails out when the pointee references errors,
// fall back to structurally deducing metadata.
&& !pointee.references_error()
{
let metadata_ty = tcx.normalize_erasing_regions(
param_env,
tcx.mk_projection(metadata_def_id, [pointee]),