bors cca3373706 Auto merge of #113113 - Amanieu:box-vec-zst, r=Mark-Simulacrum ... Eliminate ZST allocations in `Box` and `Vec` This PR fixes 2 issues with `Box` and `RawVec` related to ZST allocations. Specifically, the `Allocator` trait requires that: - If you allocate a zero-sized layout then you must later deallocate it, otherwise the allocator may leak memory. - You cannot pass a ZST pointer to the allocator that you haven't previously allocated. These restrictions exist because an allocator implementation is allowed to allocate non-zero amounts of memory for a zero-sized allocation. For example, `malloc` in libc does this. Currently, ZSTs are handled differently in `Box` and `Vec`: - `Vec` never allocates when `T` is a ZST or if the vector capacity is 0. - `Box` just blindly passes everything on to the allocator, including ZSTs. This causes problems due to the free conversions between `Box<[T]>` and `Vec<T>`, specifically that ZST allocations could get leaked or a dangling pointer could be passed to `deallocate`. This PR fixes this by changing `Box` to not allocate for zero-sized values and slices. It also fixes a bug in `RawVec::shrink` where shrinking to a size of zero did not actually free the backing memory.		2023-07-14 01:59:08 +00:00
..
auxiliary	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
arguments.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
arguments.stderr	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
assoc_item_ctxt.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
assoc_item_ctxt.stderr	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
assoc_ty_bindings.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
cross-crate-codegen-attrs.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-define-and-use.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-fields.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-glob-hygiene.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-glob-hygiene.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-methods.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-name-collision.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-name-hiding-2.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-name-hiding-2.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-name-hiding.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-name-hiding.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-redefine.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-redefine.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
cross-crate-variants.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
dollar-crate-modern.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
duplicate_lifetimes.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
duplicate_lifetimes.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
eager-from-opaque-2.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
eager-from-opaque.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
expansion-info-reset.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
expansion-info-reset.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
extern-prelude-from-opaque-fail-2018.rs	Add filter with next segment while lookup typo for path	2023-07-07 09:00:50 +08:00
extern-prelude-from-opaque-fail-2018.stderr	adjust smart_resolve_partial_mod_path_errors	2023-07-07 10:19:30 +08:00
extern-prelude-from-opaque-fail.rs	Add filter with next segment while lookup typo for path	2023-07-07 09:00:50 +08:00
extern-prelude-from-opaque-fail.stderr	adjust smart_resolve_partial_mod_path_errors	2023-07-07 10:19:30 +08:00
fields-definition.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
fields-definition.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
fields-move.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
fields-move.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
fields-numeric-borrowck.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
fields-numeric-borrowck.stderr	Do not set up wrong span for adjustments	2023-07-10 20:09:26 +00:00
fields.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
fields.stderr	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
for-loop.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
for-loop.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
format-args.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
generate-mod.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
generate-mod.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
generic_params.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
globs.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
globs.stderr	Special-case item attributes in the suggestion output	2023-04-12 22:50:10 +00:00
hir-res-hygiene.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygiene-dodging-1.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygiene.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-label-1.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-label-1.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-label-2.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-label-2.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-label-3.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-label-3.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-label-4.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-label-4.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-labels-in-let.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
hygienic-labels.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
impl_items-2.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
impl_items-2.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
impl_items.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
impl_items.stderr	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
intercrate.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
intercrate.stderr	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
issue-15221.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
issue-32922.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
issue-40847.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
issue-44128.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
issue-47311.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
issue-47312.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
issue-61574-const-parameters.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
issue-77523-def-site-async-await.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
items.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
lambda-var-hygiene.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
legacy_interaction.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
lexical.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
local_inner_macros.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
macro-metavars-legacy.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
macro-metavars-transparent.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
missing-self-diag.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
missing-self-diag.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
nested_macro_privacy.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
nested_macro_privacy.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
nested-dollar-crate.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
no_implicit_prelude-2018.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
no_implicit_prelude-2018.stderr	Make "consider importing" consistent for macros	2023-06-10 00:06:34 +08:00
no_implicit_prelude-2021.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
no_implicit_prelude.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
no_implicit_prelude.stderr	Special-case item attributes in the suggestion output	2023-04-12 22:50:10 +00:00
panic-location.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
panic-location.run.stderr	Eliminate ZST allocations in Box and Vec	2023-07-13 15:00:53 +01:00
pattern-macro.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
pattern-macro.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
prelude-import-hygiene.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
privacy-early.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
privacy-early.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
privacy.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
privacy.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
rustc-macro-transparency.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
rustc-macro-transparency.stderr	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
specialization.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
stdlib-prelude-from-opaque-early.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
stdlib-prelude-from-opaque-late.rs	Rename drop_copy lint to dropping_copy_types	2023-05-21 13:37:32 +02:00
thread-local-not-in-prelude.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
trait_items-2.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
trait_items.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
trait_items.stderr	Special-case item attributes in the suggestion output	2023-04-12 22:50:10 +00:00
traits-in-scope.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
transparent-basic.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
unpretty-debug.rs	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
unpretty-debug.stdout	Move /src/test to /tests	2023-01-11 09:32:08 +00:00
wrap_unhygienic_example.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00
xcrate.rs	remove invalid ignore-pretty	2023-04-03 09:24:11 +02:00