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authorbors <bors@rust-lang.org>2023-06-13 22:34:59 +0000
committerbors <bors@rust-lang.org>2023-06-13 22:34:59 +0000
commit6330daade9766bbf896495898c2347dc3be6da17 (patch)
tree6b2e000ca84491b3929c34b7b69d9b58000b87b0 /compiler/rustc_parse/src/parser/expr.rs
parent371994e0d8380600ddda78ca1be937c7fb179b49 (diff)
parentb982f3a98820e60eb04ac06910eca66f9a89d517 (diff)
downloadrust-6330daade9766bbf896495898c2347dc3be6da17.tar.gz
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Auto merge of #112062 - lukas-code:unsized-layout, r=wesleywiser
Make struct layout not depend on unsizeable tail

fixes (after backport) https://github.com/rust-lang/rust/issues/112048

Since unsizing `Ptr<Foo<T>>` -> `Ptr<Foo<U>` just copies the pointer and adds the metadata, the layout of `Foo` must not depend on niches in and alignment of the tail `T`.

Nominating for beta 1.71, because it will have this issue: `@rustbot` label beta-nominated
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