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Support C23's Variadics Without a Named Parameter #124048

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merged 2 commits into from
May 27, 2024

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veera-sivarajan
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Fixes #123773

This PR removes the static check that disallowed extern functions
with ellipsis (varargs) as the only parameter since this is now
valid in C23.

This will not break any existing code as mentioned in the proposal
document: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2975.pdf.

Also, adds a doc comment for check_decl_cvariadic_pos() and
fixes the name of the function (varadic -> variadic).

This PR removes the static check that disallowed extern functions
with ellipsis (varargs) as the only parameter since this is now
valid in C23.

Also, adds a doc comment for `check_decl_cvariadic_pos()` and
fixes the name of the function (`varadic` -> `variadic`).
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rustbot commented Apr 16, 2024

r? @compiler-errors

rustbot has assigned @compiler-errors.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Apr 16, 2024
@fmease fmease added T-lang Relevant to the language team, which will review and decide on the PR/issue. needs-fcp This change is insta-stable, so needs a completed FCP to proceed. I-lang-nominated Nominated for discussion during a lang team meeting. S-waiting-on-team Status: Awaiting decision from the relevant subteam (see the T-<team> label). labels Apr 17, 2024
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r=me, needs T-lang approval though first

@compiler-errors compiler-errors removed the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Apr 18, 2024
@joshtriplett joshtriplett removed the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label May 15, 2024
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Concept seems reasonable to me.

@rfcbot merge

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rfcbot commented May 15, 2024

Team member @joshtriplett has proposed to merge this. The next step is review by the rest of the tagged team members:

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

cc @rust-lang/lang-advisors: FCP proposed for lang, please feel free to register concerns.
See this document for info about what commands tagged team members can give me.

@rfcbot rfcbot added proposed-final-comment-period Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off. disposition-merge This issue / PR is in PFCP or FCP with a disposition to merge it. labels May 15, 2024
@joshtriplett joshtriplett added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label May 15, 2024
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tmandry commented May 15, 2024

Seems like a reasonable extension.

@rfcbot reviewed

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@rfcbot reviewed

@rfcbot rfcbot added final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. and removed proposed-final-comment-period Proposed to merge/close by relevant subteam, see T-<team> label. Will enter FCP once signed off. labels May 15, 2024
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rfcbot commented May 15, 2024

🔔 This is now entering its final comment period, as per the review above. 🔔

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Yeah, since this is extern "C" { … } if C says it exists, then might as well allow it.
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@rustbot labels -I-lang-nominated

We discussed this in the lang triage call today. People felt good about this, and it's now in FCP.

@rustbot rustbot removed the I-lang-nominated Nominated for discussion during a lang team meeting. label May 15, 2024
@fmease fmease removed the needs-fcp This change is insta-stable, so needs a completed FCP to proceed. label May 15, 2024
@rfcbot rfcbot added finished-final-comment-period The final comment period is finished for this PR / Issue. and removed final-comment-period In the final comment period and will be merged soon unless new substantive objections are raised. labels May 25, 2024
@rfcbot rfcbot added the to-announce Announce this issue on triage meeting label May 25, 2024
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rfcbot commented May 25, 2024

The final comment period, with a disposition to merge, as per the review above, is now complete.

As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.

This will be merged soon.

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@bors r+

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bors commented May 25, 2024

📌 Commit f005b45 has been approved by compiler-errors

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-team Status: Awaiting decision from the relevant subteam (see the T-<team> label). labels May 25, 2024
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bors commented May 26, 2024

⌛ Testing commit f005b45 with merge df5b3f0...

bors added a commit to rust-lang-ci/rust that referenced this pull request May 26, 2024
…riadics, r=compiler-errors

Support C23's Variadics Without a Named Parameter

Fixes rust-lang#123773

This PR removes the static check that disallowed extern functions
with ellipsis (varargs) as the only parameter since this is now
valid in C23.

This will not break any existing code as mentioned in the proposal
document: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2975.pdf.

Also, adds a doc comment for `check_decl_cvariadic_pos()` and
fixes the name of the function (`varadic` -> `variadic`).
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bors commented May 26, 2024

💔 Test failed - checks-actions

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels May 26, 2024
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A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)
 mingw-w64-x86_64-cmake-3.28.1-1-any downloading...
 mingw-w64-x86_64-openssl-3.2.0-1-any downloading...
 mingw-w64-x86_64-gettext-0.22.4-3-any downloading...
 mingw-w64-x86_64-curl-8.5.0-1-any downloading...
error: failed retrieving file 'mingw-w64-x86_64-openssl-3.2.0-1-any.pkg.tar.zst.sig' from mirror.umd.edu : Operation too slow. Less than 1 bytes/sec transferred the last 10 seconds
error: failed retrieving file 'mingw-w64-x86_64-curl-8.5.0-1-any.pkg.tar.zst' from mirror.msys2.org : Operation too slow. Less than 1 bytes/sec transferred the last 10 seconds
warning: too many errors from mirror.msys2.org, skipping for the remainder of this transaction
warning: failed to retrieve some files
error: failed to commit transaction (unexpected error)

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@bors retry

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 26, 2024
jhpratt added a commit to jhpratt/rust that referenced this pull request May 26, 2024
…variadics, r=compiler-errors

Support C23's Variadics Without a Named Parameter

Fixes rust-lang#123773

This PR removes the static check that disallowed extern functions
with ellipsis (varargs) as the only parameter since this is now
valid in C23.

This will not break any existing code as mentioned in the proposal
document: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2975.pdf.

Also, adds a doc comment for `check_decl_cvariadic_pos()` and
fixes the name of the function (`varadic` -> `variadic`).
bors added a commit to rust-lang-ci/rust that referenced this pull request May 27, 2024
…kingjubilee

Rollup of 8 pull requests

Successful merges:

 - rust-lang#124048 (Support C23's Variadics Without a Named Parameter)
 - rust-lang#125046 (Only allow immutable statics with #[linkage])
 - rust-lang#125466 (Don't continue probing for method if in suggestion and autoderef hits ambiguity)
 - rust-lang#125469 (Don't skip out of inner const when looking for body for suggestion)
 - rust-lang#125544 (Also mention my-self for other check-cfg docs changes)
 - rust-lang#125559 (Simplify the `unchecked_sh[lr]` ub-checks a bit)
 - rust-lang#125566 (Notify T-rustdoc for beta-accepted and stable-accepted too)
 - rust-lang#125582 (Avoid a `FieldIdx::from_usize` in InstSimplify)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 866630d into rust-lang:master May 27, 2024
12 of 13 checks passed
@rustbot rustbot added this to the 1.80.0 milestone May 27, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request May 27, 2024
Rollup merge of rust-lang#124048 - veera-sivarajan:bugfix-123773-c23-variadics, r=compiler-errors

Support C23's Variadics Without a Named Parameter

Fixes rust-lang#123773

This PR removes the static check that disallowed extern functions
with ellipsis (varargs) as the only parameter since this is now
valid in C23.

This will not break any existing code as mentioned in the proposal
document: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2975.pdf.

Also, adds a doc comment for `check_decl_cvariadic_pos()` and
fixes the name of the function (`varadic` -> `variadic`).
@veera-sivarajan veera-sivarajan deleted the bugfix-123773-c23-variadics branch May 27, 2024 04:00
@apiraino apiraino removed the to-announce Announce this issue on triage meeting label Jun 7, 2024
jaisnan pushed a commit to jaisnan/rust-dev that referenced this pull request Jul 29, 2024
Update Rust toolchain from nightly-2024-05-27 to nightly-2024-05-28
without any other source changes.
This is an automatically generated pull request. If any of the CI checks
fail, manual intervention is required. In such a case, review the
changes at https://github.com/rust-lang/rust from
rust-lang@bdbbb6c
up to
rust-lang@84b40fc.
The log for this commit range is:
rust-lang@84b40fc908 Auto merge of
rust-lang#125628 - matthiaskrgr:rollup-3zk9v3w, r=matthiaskrgr
rust-lang@4966e1ae35 Rollup merge of
rust-lang#125625 - ChrisDenton:line-endings, r=Mark-Simulacrum
rust-lang@61f9d35798 Rollup merge of
rust-lang#125616 - RalfJung:mir-validate-downcast-projection, r=compiler-errors
rust-lang@e8dd585dd8 Rollup merge of
rust-lang#125542 - GuillaumeGomez:migrate-rustdoc-verify-output-files, r=jieyouxu
rust-lang@8bd15878eb Rollup merge of
rust-lang#125339 - tbu-:pr_tidy_ui_tests_u32, r=clubby789
rust-lang@f00b02e6bb Auto merge of
rust-lang#125599 - camelid:clarify-stability, r=notriddle,GuillaumeGomez
rust-lang@7a847fc4fb Use grep to
implement verify-line-endings
rust-lang@b0f8618938 Auto merge of
rust-lang#125413 - lcnr:ambig-drop-region-constraints, r=compiler-errors
rust-lang@7d24f87068 MIR validation:
ensure that downcast projection is followed by field projection
rust-lang@f6e4703e91 Auto merge of
rust-lang#125611 - GuillaumeGomez:rollup-dfavpgg, r=GuillaumeGomez
rust-lang@bdf3864d51 Migrate
`run-make/rustdoc-verify-output-files` to `rmake.rs`
rust-lang@f0ab814aec Add
`Rustdoc::output_format`
rust-lang@1551fd1202 Add file path in
case it cannot be read in `Diff::actual_file`
rust-lang@90fec5a087 Add `copy_dir_all`
and `recursive_diff` functions to `run-make-support`
rust-lang@7083131c92 Rollup merge of
rust-lang#125607 - GuillaumeGomez:migrate-compile-stdin, r=jieyouxu
rust-lang@a9c125f864 Rollup merge of
rust-lang#125597 - compiler-errors:early-binder, r=jackh726
rust-lang@cfa7ab474f Rollup merge of
rust-lang#125535 - onur-ozkan:remove-deprecated-field, r=clubby789
rust-lang@f50b4f5034 Rollup merge of
rust-lang#125530 - SparrowLii:expand2, r=petrochenkov
rust-lang@ad37f40355 Rollup merge of
rust-lang#125522 - spastorino:fix-lint-docs-edition-handling,
r=Urgau,michaelwoerister
rust-lang@86f2fa35a2 Rollup merge of
rust-lang#125148 - RalfJung:codegen-sh, r=scottmcm
rust-lang@6dddc888fc Rollup merge of
rust-lang#124870 - Lokathor:update-result-docs, r=dtolnay
rust-lang@a59072ec4f Auto merge of
rust-lang#125602 - RalfJung:interpret-mir-lifetime, r=oli-obk
rust-lang@e4abfaeb62 Migrate
`run-make/compile-stdin` to `rmake.rs`
rust-lang@b582f807fa Auto merge of
rust-lang#125410 - fmease:adj-lint-diag-api, r=nnethercote
rust-lang@fec98b3bbc Auto merge of
rust-lang#125468 - BoxyUwU:remove_defid_from_regionparam, r=compiler-errors
rust-lang@e8379c9598 interpret: get rid
of 'mir lifetime everywhere
rust-lang@36d36a3e1f interpret: the MIR
is actually at lifetime 'tcx
rust-lang@699d28f968 rustdoc: Show
"const" for const-unstable if also overall unstable
rust-lang@cdc509f7c0 Auto merge of
rust-lang#125580 - RalfJung:miri-sync, r=RalfJung
rust-lang@f92292978f Use EarlyBinder in
rustc_type_ir, simplify imports
rust-lang@993553ceb8 Uplift EarlyBinder
rust-lang@529bb2573a Auto merge of
rust-lang#125593 - workingjubilee:rollup-67qk7di, r=workingjubilee
rust-lang@bbcdb4fd3e Give EarlyBinder a
tcx parameter
rust-lang@4ff78692db Rollup merge of
rust-lang#125582 - scottmcm:less-from-usize, r=jieyouxu
rust-lang@45507e4304 Rollup merge of
rust-lang#125566 - camelid:notify-accepted, r=GuillaumeGomez
rust-lang@25b079a1cf Rollup merge of
rust-lang#125559 - scottmcm:simplify-shift-ubcheck, r=workingjubilee
rust-lang@c51fc1d02b Rollup merge of
rust-lang#125544 - Urgau:check-cfg-mention-cargo-specific, r=jieyouxu
rust-lang@b65b2b6ced Rollup merge of
rust-lang#125469 - compiler-errors:dont-skip-inner-const-body, r=cjgillot
rust-lang@09e75921f3 Rollup merge of
rust-lang#125466 - compiler-errors:dont-probe-for-ambig-in-sugg, r=jieyouxu
rust-lang@5860d43af3 Rollup merge of
rust-lang#125046 - bjorn3:no_mutable_static_linkage, r=cjgillot
rust-lang@866630d004 Rollup merge of
rust-lang#124048 - veera-sivarajan:bugfix-123773-c23-variadics, r=compiler-errors
rust-lang@0aad3f64e2 Auto merge of
rust-lang#125576 - lnicola:sync-from-ra, r=lnicola
rust-lang@d37f456b2a Avoid a
`FieldIdx::from_usize` in InstSimplify
rust-lang@0963353634 Auto merge of rust-lang#3631
- RalfJung:blocking-refactor, r=RalfJung
rust-lang@2e89443b93 add a macro to
declare thread unblock callbacks
rust-lang@8e861c6c4c Auto merge of rust-lang#3632
- RalfJung:readdir, r=RalfJung
rust-lang@350f5c88db unix/fs: a bit of
cleanup in macos_fbsd_readdir_r
rust-lang@e09bf5694b Auto merge of rust-lang#3633
- RalfJung:target, r=RalfJung
rust-lang@cbec1288a2 fix './miri run
--dep --target _'
rust-lang@e6bb468b53 data_race: vector
indices can be reused immediately when the thread is gone
rust-lang@a131243557 completely refactor
how we manage blocking and unblocking threads
rust-lang@f7ca8a6d66 Auto merge of rust-lang#17296
- mathew-horner:no-clone-target, r=Veykril
rust-lang@bd9cc02d10 Auto merge of rust-lang#17295
- 0xJonas:fix_passing_env_vars_to_cpptools, r=Veykril
rust-lang@5fa30f7eaa make release_clock
always work on the current thread
rust-lang@fa7a3f9049 rustdoc: Elide
const-unstable if also unstable overall
rust-lang@91b3ef5b4a Notify T-rustdoc for
beta-accepted and stable-accepted too
rust-lang@9b480da367 It seems that anchor
names are implicitly all lowercase
rust-lang@0c84361342 Simplify the
`unchecked_sh[lr]` ub-checks a bit
rust-lang@f8279b10c3 Fix URL target, it's
in the module not the type.
rust-lang@2b2f83e5ff github showed that
weird.
rust-lang@2e8f14fb37 correct for copy
paste errors when fixing wrapping.
rust-lang@22668e83f6 Resolve
rust-lang#124870 (comment)
rust-lang@939f2671a0 revert to the
inconsistent paragraph wrapping.
rust-lang@eb9894f3c9 Removed return
rust-lang@afa8dfc51f Avoid clone when
constructing runnable label.
rust-lang@09677b03dd Formatting
rust-lang@78fe45e273 Semicolon
rust-lang@2315c6b764 Use correct format
for setting environment variables when debugging with cpptools
rust-lang@331bb3f10d Auto merge of rust-lang#3630
- rust-lang:rustup-2024-05-25, r=saethlin
rust-lang@bebcb4e4b8 Also mention my-self
for check-cfg docs changes
rust-lang@c76477d909 add change entry
rust-lang@56dddd4c7e Remove deprecated
field `dist.missing-tools`
rust-lang@1d0ad04993 Merge from rustc
rust-lang@3cfcfbf083 Preparing for merge
from rustc
rust-lang@41d4a95fca Add "better" edition
handling on lint-docs tool
rust-lang@278212342e cleanup dependence
of `ExtCtxt` in transcribe when macro expansion
rust-lang@24b5466892 drop region
constraints for ambiguous goals
rust-lang@ed8e436916 move generics_of
call outside of iter
rust-lang@56d77b9048 Auto merge of rust-lang#17275
- roife:fix-issue-17012, r=Veykril
rust-lang@796cb8031d Remove failing tests
rust-lang@f856ee357c Remove `DefId` from
`EarlyParamRegion` (clippy/smir)
rust-lang@fe2d7794ca Remove `DefId` from
`EarlyParamRegion` (tedium/diagnostics)
rust-lang@bd6344d829 Remove `DefId` from
`EarlyParamRegion` (type system)
rust-lang@b7b350cff7 docs
rust-lang@008f6b3a3f Auto merge of rust-lang#3626
- devnexen:pthread_name_illumos, r=oli-obk
rust-lang@7fc41d1bdf Auto merge of rust-lang#3625
- Strophox:miri-allocation-fix, r=RalfJung
rust-lang@b84620ff17 extend comments
rust-lang@88d519f718 Auto merge of rust-lang#3628
- RalfJung:tokio, r=RalfJung
rust-lang@561bd9a5ec add back some tokio
features
rust-lang@10d414091b Auto merge of rust-lang#3627
- rust-lang:rustup-2024-05-24, r=RalfJung
rust-lang@4763eaf066 fmt
rust-lang@debf88ae1a Merge from rustc
rust-lang@9ce95c30b2 Preparing for merge
from rustc
rust-lang@c58b7c9c81 Don't skip inner
const when looking for body for suggestion
rust-lang@4bc41b91d7 Don't continue
probing for method if in suggestion and autoderef hits ambiguity
rust-lang@7f5e0aade8 solaris add suport
for threadname.
rust-lang@3c7a13d870 tests: update test
for runnables
rust-lang@c10bda5577 Update docs
rust-lang@1a37cfb703 Use cwd from
runnable.args for debugger
rust-lang@7b54c8231e Revert "Debug use
cargo workspace root as cwd. fixes rust-lang#13022"
rust-lang@d83b267bc1 Add cwd to
CargoRunnable
rust-lang@6259991f04 Auto merge of rust-lang#17287
- Veykril:sysroot-encode-empty, r=Veykril
rust-lang@f93256ca42 Allow sysroots to
only consist of the source root dir
rust-lang@1b374dfd9b differentiate
between layout and alloc_layout
rust-lang@56c363b43e fix alloc_bytes
(always allocate at least 1B)
rust-lang@ecadf37df4 Auto merge of rust-lang#17284
- Veykril:doc-links, r=Veykril
rust-lang@616fdd04bb Use correct
toolchain channel when generating builtin type doc links
rust-lang@6e8646df8b Auto merge of rust-lang#17174
- Kohei316:fix-infer-async-block-with-tail-return-expr, r=Veykril
rust-lang@425ed6a181 Update
crates/hir-ty/src/infer/expr.rs
rust-lang@68fe34a4c2 Auto merge of rust-lang#17140
- harrysarson:harry-unused-self, r=Veykril
rust-lang@6ea763b9e2 Auto merge of rust-lang#3624
- rust-lang:rustup-2024-05-23, r=RalfJung
rust-lang@400835fd11 fmt
rust-lang@f1ffb8d859 Merge from rustc
rust-lang@807a0f8c21 Preparing for merge
from rustc
rust-lang@37bf2d2dab Delay the
construction of early lint diag structs
rust-lang@9f67c50128 Remove `DelayDm`
rust-lang@06bc4fc671 Remove
`LintDiagnostic::msg`
rust-lang@366ef95407 Slightly clean up
some lint infra code
rust-lang@ac2708a347 Auto merge of rust-lang#17270
- davidbarsky:david/fix-completions-from-associated-types, r=Veykril
rust-lang@f2c3ef77b1 fix: ensure implied
bounds from associated types are considered in autocomplete
rust-lang@04a9a1a531 Auto merge of rust-lang#3614
- devnexen:illumos_time_support, r=oli-obk
rust-lang@0916e72a34 Auto merge of rust-lang#17251
- roife:fix-issue-17057, r=Veykril
rust-lang@56ce7e0e06 Auto merge of rust-lang#17252
- davidbarsky:david/refactor-standalone-bools-into-struct, r=Veykril
rust-lang@f50f8fbcb9 Simplify
rust-lang@7a21dff517 internal: refactor
`prefer_no_std`/`prefer_prelude` bools into a struct
rust-lang@4e9b12870c fix: check
pseudo-block by local_id instead of ModuleOrigin
rust-lang@ad810a51f0 Auto merge of rust-lang#17277
- Veykril:find-path-fixes, r=Veykril
rust-lang@3f638a9291 solaris/illumos
localtime_r / clock_getime support enabled.
rust-lang@d9dda8f84f Auto merge of rust-lang#17279
- Veykril:format_args-escape, r=Veykril
rust-lang@2ff9bab2eb fix: Fix format_args
lowering passing incorrect parameters to rustc_parse_format
rust-lang@39e6032445 Auto merge of rust-lang#17248
- mladedav:dm/delay-clear, r=Veykril
rust-lang@24bf53d993 Auto merge of rust-lang#17268
- Veykril:signatures, r=Veykril
rust-lang@b1830a5fe6 Update assists test
fixtures
rust-lang@b29c755572 expectify find_path
tests
rust-lang@5992af6506 fix: Fix general
find-path inconsistencies
rust-lang@7fd1429754 Auto merge of rust-lang#3623
- RalfJung:rustup, r=RalfJung
rust-lang@abbe244a81 clippy
rust-lang@a1bc030b70 Merge from rustc
rust-lang@24138f0034 Preparing for merge
from rustc
rust-lang@c8b0e5b1a4 The number of tests
does not depend on the architecture's pointer width
rust-lang@719eee2d82 test: add tests for
extern preludes resolving in local mods
rust-lang@41c006e21a Auto merge of rust-lang#3610
- marc0246:missing-error-kinds, r=RalfJung
rust-lang@37a37f6ab3 Use
`throw_unsup_format` instead of returning `ENOTSUP` in the mmap shim
rust-lang@6438554bce Show fn traits in
signature info for trait implementors
rust-lang@f42e55dfc8 Enable linked
locations for closure param inlay hints
rust-lang@4b3d7f6039 Render closure fn
trait kind in siganture help
rust-lang@7045044da3 Allow hir::Param to
refer to other entity params aside from functions
rust-lang@9ff4ffb817 Update builtin tool
list
rust-lang@ea2a16cadb fix: resolve extern
prelude for local mods in block modules
rust-lang@1287e868e9 Clear diagnostics
only after new ones were received
rust-lang@17bd43cb25 codegen:
tweak/extend shift comments
rust-lang@b468f21051 Don't use `T` with
both Result and Option, improve explanation.
rust-lang@531dae1cdf Only allow immutable
statics with #[linkage]
rust-lang@10f8d1ffef use teletype on the
attribute name
rust-lang@f94fa6bee3 Some Result
combinations work like an Option.
rust-lang@dd16cbcb4e braces around {self}
in UseTree are not unnecessary
rust-lang@39a653f632 Fix coercion of
async block
rust-lang@f005b451c2 Support C23's
Variadics Without a Named Parameter
rust-lang@62a104df98 Update Tests

Co-authored-by: qinheping <16714939+qinheping@users.noreply.github.com>
netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this pull request Oct 13, 2024
This is based on the pkgsrc-wip rust180 package, retaining
the main pkgsrc changes as best as I could.

Pkgsrc changes:
 * Adapt checksums and patches.
 * Make this work again on big-endian aarch64 (at least on NetBSD).
 * Make the choice of GCC = 12 work for sparc64 by testing options
   after options.mk is included (which is required...).  Makes this
   work on NetBSD/sparc64 10.0 again.

Upstream chnages:

Version 1.80.1 (2024-08-08)
===========================

- [Fix miscompilation in the jump threading MIR optimization when
  comparing floats]
  (rust-lang/rust#128271)
- [Revert changes to the `dead_code` lint from 1.80.0]
  (rust-lang/rust#128618)

Version 1.80.0 (2024-07-25)
==========================

Language
--------
- [Document maximum allocation size]
  (rust-lang/rust#116675)
- [Allow zero-byte offsets and ZST read/writes on arbitrary pointers]
  (rust-lang/rust#117329)
- [Support C23's variadics without a named parameter]
  (rust-lang/rust#124048)
- [Stabilize `exclusive_range_pattern` feature]
  (rust-lang/rust#124459)
- [Guarantee layout and ABI of `Result` in some scenarios]
  (rust-lang/rust#124870)

Compiler
--------
- [Update cc crate to v1.0.97 allowing additional spectre mitigations
  on MSVC targets]
  (rust-lang/rust#124892)
- [Allow field reordering on types marked `repr(packed(1))`]
  (rust-lang/rust#125360)
- [Add a lint against never type fallback affecting unsafe code]
  (rust-lang/rust#123939)
- [Disallow cast with trailing braced macro in let-else]
  (rust-lang/rust#125049)
- [Expand `for_loops_over_fallibles` lint to lint on fallibles
  behind references.]
  (rust-lang/rust#125156)
- [self-contained linker: retry linking without `-fuse-ld=lld` on
  CCs that don't support it]
  (rust-lang/rust#125417)
- [Do not parse CVarArgs (`...`) as a type in trait bounds]
  (rust-lang/rust#125863)
- Improvements to LLDB formatting [#124458]
  (rust-lang/rust#124458) [#124500]
  (rust-lang/rust#124500)
- [For the wasm32-wasip2 target default to PIC and do not use `-fuse-ld=lld`]
  (rust-lang/rust#124858)
- [Add x86_64-unknown-linux-none as a tier 3 target]
  (rust-lang/rust#125023)
- [Lint on `foo.into_iter()` resolving to `&Box<[T]>: IntoIterator`]
  (rust-lang/rust#124097)

Libraries
---------
- [Add `size_of` and `size_of_val` and `align_of` and `align_of_val`
  to the prelude]
  (rust-lang/rust#123168)
- [Abort a process when FD ownership is violated]
  (rust-lang/rust#124210)
- [io::Write::write_fmt: panic if the formatter fails when the
  stream does not fail]
  (rust-lang/rust#125012)
- [Panic if `PathBuf::set_extension` would add a path separator]
  (rust-lang/rust#125070)
- [Add assert_unsafe_precondition to unchecked_{add,sub,neg,mul,shl,shr}
  methods] (rust-lang/rust#121571)
- [Update `c_char` on AIX to use the correct type]
  (rust-lang/rust#122986)
- [`offset_of!` no longer returns a temporary]
  (rust-lang/rust#124484)
- [Handle sigma in `str.to_lowercase` correctly]
  (rust-lang/rust#124773)
- [Raise `DEFAULT_MIN_STACK_SIZE` to at least 64KiB]
  (rust-lang/rust#126059)

Stabilized APIs
---------------
- [`impl Default for Rc<CStr>`]
  (https://doc.rust-lang.org/beta/alloc/rc/struct.Rc.html#impl-Default-for-Rc%3CCStr%3E)
- [`impl Default for Rc<str>`]
  (https://doc.rust-lang.org/beta/alloc/rc/struct.Rc.html#impl-Default-for-Rc%3Cstr%3E)
- [`impl Default for Rc<[T]>`]
  (https://doc.rust-lang.org/beta/alloc/rc/struct.Rc.html#impl-Default-for-Rc%3C%5BT%5D%3E)
- [`impl Default for Arc<str>`]
  (https://doc.rust-lang.org/beta/alloc/sync/struct.Arc.html#impl-Default-for-Arc%3Cstr%3E)
- [`impl Default for Arc<CStr>`]
  (https://doc.rust-lang.org/beta/alloc/sync/struct.Arc.html#impl-Default-for-Arc%3CCStr%3E)
- [`impl Default for Arc<[T]>`]
  (https://doc.rust-lang.org/beta/alloc/sync/struct.Arc.html#impl-Default-for-Arc%3C%5BT%5D%3E)
- [`impl IntoIterator for Box<[T]>`]
  (https://doc.rust-lang.org/beta/alloc/boxed/struct.Box.html#impl-IntoIterator-for-Box%3C%5BI%5D,+A%3E)
- [`impl FromIterator<String> for Box<str>`]
  (https://doc.rust-lang.org/beta/alloc/boxed/struct.Box.html#impl-FromIterator%3CString%3E-for-Box%3Cstr%3E)
- [`impl FromIterator<char> for Box<str>`]
  (https://doc.rust-lang.org/beta/alloc/boxed/struct.Box.html#impl-FromIterator%3Cchar%3E-for-Box%3Cstr%3E)
- [`LazyCell`]
  (https://doc.rust-lang.org/beta/core/cell/struct.LazyCell.html)
- [`LazyLock`]
  (https://doc.rust-lang.org/beta/std/sync/struct.LazyLock.html)
- [`Duration::div_duration_f32`]
  (https://doc.rust-lang.org/beta/std/time/struct.Duration.html#method.div_duration_f32)
- [`Duration::div_duration_f64`]
  (https://doc.rust-lang.org/beta/std/time/struct.Duration.html#method.div_duration_f64)
- [`Option::take_if`]
  (https://doc.rust-lang.org/beta/std/option/enum.Option.html#method.take_if)
- [`Seek::seek_relative`]
  (https://doc.rust-lang.org/beta/std/io/trait.Seek.html#method.seek_relative)
- [`BinaryHeap::as_slice`]
  (https://doc.rust-lang.org/beta/std/collections/struct.BinaryHeap.html#method.as_slice)
- [`NonNull::offset`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.offset)
- [`NonNull::byte_offset`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.byte_offset)
- [`NonNull::add`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.add)
- [`NonNull::byte_add`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.byte_add)
- [`NonNull::sub`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.sub)
- [`NonNull::byte_sub`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.byte_sub)
- [`NonNull::offset_from`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.offset_from)
- [`NonNull::byte_offset_from`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.byte_offset_from)
- [`NonNull::read`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.read)
- [`NonNull::read_volatile`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.read_volatile)
- [`NonNull::read_unaligned`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.read_unaligned)
- [`NonNull::write`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.write)
- [`NonNull::write_volatile`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.write_volatile)
- [`NonNull::write_unaligned`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.write_unaligned)
- [`NonNull::write_bytes`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.write_bytes)
- [`NonNull::copy_to`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.copy_to)
- [`NonNull::copy_to_nonoverlapping`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.copy_to_nonoverlapping)
- [`NonNull::copy_from`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.copy_from)
- [`NonNull::copy_from_nonoverlapping`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.copy_from_nonoverlapping)
- [`NonNull::replace`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.replace)
- [`NonNull::swap`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.swap)
- [`NonNull::drop_in_place`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.drop_in_place)
- [`NonNull::align_offset`]
  (https://doc.rust-lang.org/beta/std/ptr/struct.NonNull.html#method.align_offset)
- [`<[T]>::split_at_checked`]
  (https://doc.rust-lang.org/beta/std/primitive.slice.html#method.split_at_checked)
- [`<[T]>::split_at_mut_checked`]
  (https://doc.rust-lang.org/beta/std/primitive.slice.html#method.split_at_mut_checked)
- [`str::split_at_checked`]
  (https://doc.rust-lang.org/beta/std/primitive.str.html#method.split_at_checked)
- [`str::split_at_mut_checked`]
  (https://doc.rust-lang.org/beta/std/primitive.str.html#method.split_at_mut_checked)
- [`str::trim_ascii`]
  (https://doc.rust-lang.org/beta/std/primitive.str.html#method.trim_ascii)
- [`str::trim_ascii_start`]
  (https://doc.rust-lang.org/beta/std/primitive.str.html#method.trim_ascii_start)
- [`str::trim_ascii_end`]
  (https://doc.rust-lang.org/beta/std/primitive.str.html#method.trim_ascii_end)
- [`<[u8]>::trim_ascii`]
  (https://doc.rust-lang.org/beta/core/primitive.slice.html#method.trim_ascii)
- [`<[u8]>::trim_ascii_start`]
  (https://doc.rust-lang.org/beta/core/primitive.slice.html#method.trim_ascii_start)
- [`<[u8]>::trim_ascii_end`]
  (https://doc.rust-lang.org/beta/core/primitive.slice.html#method.trim_ascii_end)
- [`Ipv4Addr::BITS`]
  (https://doc.rust-lang.org/beta/core/net/struct.Ipv4Addr.html#associatedconstant.BITS)
- [`Ipv4Addr::to_bits`]
  (https://doc.rust-lang.org/beta/core/net/struct.Ipv4Addr.html#method.to_bits)
- [`Ipv4Addr::from_bits`]
  (https://doc.rust-lang.org/beta/core/net/struct.Ipv4Addr.html#method.from_bits)
- [`Ipv6Addr::BITS`]
  (https://doc.rust-lang.org/beta/core/net/struct.Ipv6Addr.html#associatedconstant.BITS)
- [`Ipv6Addr::to_bits`]
  (https://doc.rust-lang.org/beta/core/net/struct.Ipv6Addr.html#method.to_bits)
- [`Ipv6Addr::from_bits`]
  (https://doc.rust-lang.org/beta/core/net/struct.Ipv6Addr.html#method.from_bits)
- [`Vec::<[T; N]>::into_flattened`]
  (https://doc.rust-lang.org/beta/alloc/vec/struct.Vec.html#method.into_flattened)
- [`<[[T; N]]>::as_flattened`]
  (https://doc.rust-lang.org/beta/core/primitive.slice.html#method.as_flattened)
- [`<[[T; N]]>::as_flattened_mut`]
  (https://doc.rust-lang.org/beta/core/primitive.slice.html#method.as_flattened_mut)

These APIs are now stable in const contexts:

- [`<[T]>::last_chunk`]
  (https://doc.rust-lang.org/beta/core/primitive.slice.html#method.last_chunk)
- [`BinaryHeap::new`]
  (https://doc.rust-lang.org/beta/std/collections/struct.BinaryHeap.html#method.new)

Cargo
-----

- [Stabilize `-Zcheck-cfg` as always enabled]
  (rust-lang/cargo#13571)
- [Warn, rather than fail publish, if a target is excluded]
  (rust-lang/cargo#13713)
- [Add special `check-cfg` lint config for the `unexpected_cfgs` lint]
  (rust-lang/cargo#13913)
- [Stabilize `cargo update --precise <yanked>`]
  (rust-lang/cargo#13974)
- [Don't change file permissions on `Cargo.toml` when using `cargo add`]
  (rust-lang/cargo#13898)
- [Support using `cargo fix` on IPv6-only networks]
  (rust-lang/cargo#13907)

Rustdoc
-----

- [Allow searching for references]
  (rust-lang/rust#124148)
- [Stabilize `custom_code_classes_in_docs` feature]
  (rust-lang/rust#124577)
- [fix: In cross-crate scenarios show enum variants on type aliases of enums]
  (rust-lang/rust#125300)

Compatibility Notes
-------------------

- [rustfmt estimates line lengths differently when using non-ascii characters]
  (rust-lang/rustfmt#6203)
- [Type aliases are now handled correctly in orphan check]
  (rust-lang/rust#117164)
- [Allow instructing rustdoc to read from stdin via `-`]
  (rust-lang/rust#124611)
- [`std::env::{set_var, remove_var}` can no longer be converted to
  safe function pointers and no longer implement the `Fn` family of
  traits]
  (rust-lang/rust#124636)
- [Warn (or error) when `Self` constructor from outer item is
  referenced in inner nested item]
  (rust-lang/rust#124187)
- [Turn `indirect_structural_match` and `pointer_structural_match`
  lints into hard errors]
  (rust-lang/rust#124661)
- [Make `where_clause_object_safety` lint a regular object safety violation]
  (rust-lang/rust#125380)
- [Turn `proc_macro_back_compat` lint into a hard error.]
  (rust-lang/rust#125596)
- [Detect unused structs even when implementing private traits]
  (rust-lang/rust#122382)
- [`std::sync::ReentrantLockGuard<T>` is no longer `Sync` if `T: !Sync`]
  (rust-lang/rust#125527) which means
  [`std::io::StdoutLock` and `std::io::StderrLock` are no longer
  Sync] (rust-lang/rust#127340)

Internal Changes
----------------

These changes do not affect any public interfaces of Rust, but they represent
significant improvements to the performance or internals of rustc and related
tools.

- Misc improvements to size of generated html by rustdoc e.g. [#124738]
  (rust-lang/rust#124738) and [#123734]
  (rust-lang/rust#123734)
- [MSVC targets no longer depend on libc]
  (rust-lang/rust#124050)


Version 1.79.0 (2024-06-13)
==========================

Language
--------
- [Stabilize inline `const {}` expressions.]
  (rust-lang/rust#104087)
- [Prevent opaque types being instantiated twice with different
  regions within the same function.]
  (rust-lang/rust#116935)
- [Stabilize WebAssembly target features that are in phase 4 and 5.]
  (rust-lang/rust#117457)
- [Add the `redundant_lifetimes` lint to detect lifetimes which
  are semantically redundant.]
  (rust-lang/rust#118391)
- [Stabilize the `unnameable_types` lint for public types that can't be named.]
  (rust-lang/rust#120144)
- [Enable debuginfo in macros, and stabilize `-C collapse-macro-debuginfo`
  and `#[collapse_debuginfo]`.]
  (rust-lang/rust#120845)
- [Propagate temporary lifetime extension into `if` and `match` expressions.]
  (rust-lang/rust#121346)
- [Restrict promotion of `const fn` calls.]
  (rust-lang/rust#121557)
- [Warn against refining impls of crate-private traits with
  `refining_impl_trait` lint.]
  (rust-lang/rust#121720)
- [Stabilize associated type bounds (RFC 2289).]
  (rust-lang/rust#122055)
- [Stabilize importing `main` from other modules or crates.]
  (rust-lang/rust#122060)
- [Check return types of function types for well-formedness]
  (rust-lang/rust#115538)
- [Rework `impl Trait` lifetime inference]
  (rust-lang/rust#116891)
- [Change inductive trait solver cycles to be ambiguous]
  (rust-lang/rust#122791)

Compiler
--------
- [Define `-C strip` to only affect binaries, not artifacts like `.pdb`.]
  (rust-lang/rust#115120)
- [Stabilize `-Crelro-level` for controlling runtime link hardening.]
  (rust-lang/rust#121694)
- [Stabilize checking of `cfg` names and values at compile-time
  with `--check-cfg`.]
  (rust-lang/rust#123501)
  *Note that this only stabilizes the compiler part, the Cargo part
  is still unstable in this release.*
- [Add `aarch64-apple-visionos` and `aarch64-apple-visionos-sim`
  tier 3 targets.]
  (rust-lang/rust#121419)
- [Add `riscv32ima-unknown-none-elf` tier 3 target.]
  (rust-lang/rust#122696)
- [Promote several Windows targets to tier 2]
  (rust-lang/rust#121712):
  `aarch64-pc-windows-gnullvm`, `i686-pc-windows-gnullvm`, and
  `x86_64-pc-windows-gnullvm`.

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

Libraries
---------

- [Implement `FromIterator` for `(impl Default + Extend, impl
  Default + Extend)`.]
  (rust-lang/rust#107462)
- [Implement `{Div,Rem}Assign<NonZero<X>>` on `X`.]
  (rust-lang/rust#121952)
- [Document overrides of `clone_from()` in core/std.]
  (rust-lang/rust#122201)
- [Link MSVC default lib in core.]
  (rust-lang/rust#122268)
- [Caution against using `transmute` between pointers and integers.]
  (rust-lang/rust#122379)
- [Enable frame pointers for the standard library.]
  (rust-lang/rust#122646)

Stabilized APIs
---------------

- [`{integer}::unchecked_add`]
  (https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_add)
- [`{integer}::unchecked_mul`]
  (https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_mul)
- [`{integer}::unchecked_sub`]
  (https://doc.rust-lang.org/stable/core/primitive.i32.html#method.unchecked_sub)
- [`<[T]>::split_at_unchecked`]
  (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_unchecked)
- [`<[T]>::split_at_mut_unchecked`]
  (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.split_at_mut_unchecked)
- [`<[u8]>::utf8_chunks`]
  (https://doc.rust-lang.org/stable/core/primitive.slice.html#method.utf8_chunks)
- [`str::Utf8Chunks`]
  (https://doc.rust-lang.org/stable/core/str/struct.Utf8Chunks.html)
- [`str::Utf8Chunk`]
  (https://doc.rust-lang.org/stable/core/str/struct.Utf8Chunk.html)
- [`<*const T>::is_aligned`]
  (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_aligned)
- [`<*mut T>::is_aligned`]
  (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_aligned-1)
- [`NonNull::is_aligned`]
  (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.is_aligned)
- [`<*const [T]>::len`]
  (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.len)
- [`<*mut [T]>::len`]
  (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.len-1)
- [`<*const [T]>::is_empty`]
  (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_empty)
- [`<*mut [T]>::is_empty`]
  (https://doc.rust-lang.org/stable/core/primitive.pointer.html#method.is_empty-1)
- [`NonNull::<[T]>::is_empty`]
  (https://doc.rust-lang.org/stable/core/ptr/struct.NonNull.html#method.is_empty)
- [`CStr::count_bytes`]
  (https://doc.rust-lang.org/stable/core/ffi/c_str/struct.CStr.html#method.count_bytes)
- [`io::Error::downcast`]
  (https://doc.rust-lang.org/stable/std/io/struct.Error.html#method.downcast)
- [`num::NonZero<T>`]
  (https://doc.rust-lang.org/stable/core/num/struct.NonZero.html)
- [`path::absolute`]
  (https://doc.rust-lang.org/stable/std/path/fn.absolute.html)
- [`proc_macro::Literal::byte_character`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.Literal.html#method.byte_character)
- [`proc_macro::Literal::c_string`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.Literal.html#method.c_string)

These APIs are now stable in const contexts:

- [`Atomic*::into_inner`]
  (https://doc.rust-lang.org/stable/core/sync/atomic/struct.AtomicUsize.html#method.into_inner)
- [`io::Cursor::new`]
  (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.new)
- [`io::Cursor::get_ref`]
  (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.get_ref)
- [`io::Cursor::position`]
  (https://doc.rust-lang.org/stable/std/io/struct.Cursor.html#method.position)
- [`io::empty`]
  (https://doc.rust-lang.org/stable/std/io/fn.empty.html)
- [`io::repeat`]
  (https://doc.rust-lang.org/stable/std/io/fn.repeat.html)
- [`io::sink`]
  (https://doc.rust-lang.org/stable/std/io/fn.sink.html)
- [`panic::Location::caller`]
  (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.caller)
- [`panic::Location::file`]
  (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.file)
- [`panic::Location::line`]
  (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.line)
- [`panic::Location::column`]
  (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.column)

Cargo
-----

- [Prevent dashes in `lib.name`, always normalizing to `_`.]
  (rust-lang/cargo#12783)
- [Stabilize MSRV-aware version requirement selection in `cargo add`.]
  (rust-lang/cargo#13608)
- [Switch to using `gitoxide` by default for listing files.]
  (rust-lang/cargo#13696)

Rustdoc
-----

- [Always display stability version even if it's the same as the
  containing item.]
  (rust-lang/rust#118441)
- [Show a single search result for items with multiple paths.]
  (rust-lang/rust#119912)
- [Support typing `/` in docs to begin a search.]
  (rust-lang/rust#123355)

Misc
----

Compatibility Notes
-------------------

- [Update the minimum external LLVM to 17.]
  (rust-lang/rust#122649)
- [`RustcEncodable` and `RustcDecodable` are soft-destabilized, to
  be removed from the prelude in next edition.]
  (rust-lang/rust#116016)
- [The `wasm_c_abi` future-incompatibility lint will warn about use of the
  non-spec-compliant C ABI.]
  (rust-lang/rust#117918)
  Use `wasm-bindgen v0.2.88` to generate forward-compatible bindings.
- [Check return types of function types for well-formedness]
  (rust-lang/rust#115538)

Version 1.78.0 (2024-05-02)
===========================

Language
--------
- [Stabilize `#[cfg(target_abi = ...)]`]
  (rust-lang/rust#119590)
- [Stabilize the `#[diagnostic]` namespace and
  `#[diagnostic::on_unimplemented]` attribute]
  (rust-lang/rust#119888)
- [Make async-fn-in-trait implementable with concrete signatures]
  (rust-lang/rust#120103)
- [Make matching on NaN a hard error, and remove the rest of
  `illegal_floating_point_literal_pattern`]
  (rust-lang/rust#116284)
- [static mut: allow mutable reference to arbitrary types, not just
  slices and arrays]
  (rust-lang/rust#117614)
- [Extend `invalid_reference_casting` to include references casting
  to bigger memory layout]
  (rust-lang/rust#118983)
- [Add `non_contiguous_range_endpoints` lint for singleton gaps
  after exclusive ranges]
  (rust-lang/rust#118879)
- [Add `wasm_c_abi` lint for use of older wasm-bindgen versions]
  (rust-lang/rust#117918)
  This lint currently only works when using Cargo.
- [Update `indirect_structural_match` and `pointer_structural_match`
  lints to match RFC]
  (rust-lang/rust#120423)
- [Make non-`PartialEq`-typed consts as patterns a hard error]
  (rust-lang/rust#120805)
- [Split `refining_impl_trait` lint into `_reachable`, `_internal` variants]
  (rust-lang/rust#121720)
- [Remove unnecessary type inference when using associated types
  inside of higher ranked `where`-bounds]
  (rust-lang/rust#119849)
- [Weaken eager detection of cyclic types during type inference]
  (rust-lang/rust#119989)
- [`trait Trait: Auto {}`: allow upcasting from `dyn Trait` to `dyn Auto`]
  (rust-lang/rust#119338)

Compiler
--------

- [Made `INVALID_DOC_ATTRIBUTES` lint deny by default]
  (rust-lang/rust#111505)
- [Increase accuracy of redundant `use` checking]
  (rust-lang/rust#117772)
- [Suggest moving definition if non-found macro_rules! is defined later]
  (rust-lang/rust#121130)
- [Lower transmutes from int to pointer type as gep on null]
  (rust-lang/rust#121282)

Target changes:

- [Windows tier 1 targets now require at least Windows 10]
  (rust-lang/rust#115141)
 - [Enable CMPXCHG16B, SSE3, SAHF/LAHF and 128-bit Atomics in tier 1 Windows]
  (rust-lang/rust#120820)
- [Add `wasm32-wasip1` tier 2 (without host tools) target]
  (rust-lang/rust#120468)
- [Add `wasm32-wasip2` tier 3 target]
  (rust-lang/rust#119616)
- [Rename `wasm32-wasi-preview1-threads` to `wasm32-wasip1-threads`]
  (rust-lang/rust#122170)
- [Add `arm64ec-pc-windows-msvc` tier 3 target]
  (rust-lang/rust#119199)
- [Add `armv8r-none-eabihf` tier 3 target for the Cortex-R52]
  (rust-lang/rust#110482)
- [Add `loongarch64-unknown-linux-musl` tier 3 target]
  (rust-lang/rust#121832)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

Libraries
---------

- [Bump Unicode to version 15.1.0, regenerate tables]
  (rust-lang/rust#120777)
- [Make align_offset, align_to well-behaved in all cases]
  (rust-lang/rust#121201)
- [PartialEq, PartialOrd: document expectations for transitive chains]
  (rust-lang/rust#115386)
- [Optimize away poison guards when std is built with panic=abort]
  (rust-lang/rust#100603)
- [Replace pthread `RwLock` with custom implementation]
  (rust-lang/rust#110211)
- [Implement unwind safety for Condvar on all platforms]
  (rust-lang/rust#121768)
- [Add ASCII fast-path for `char::is_grapheme_extended`]
  (rust-lang/rust#121138)

Stabilized APIs
---------------

- [`impl Read for &Stdin`]
  (https://doc.rust-lang.org/stable/std/io/struct.Stdin.html#impl-Read-for-%26Stdin)
- [Accept non `'static` lifetimes for several `std::error::Error`
  related implementations] (rust-lang/rust#113833)
- [Make `impl<Fd: AsFd>` impl take `?Sized`]
  (rust-lang/rust#114655)
- [`impl From<TryReserveError> for io::Error`]
  (https://doc.rust-lang.org/stable/std/io/struct.Error.html#impl-From%3CTryReserveError%3E-for-Error)

These APIs are now stable in const contexts:

- [`Barrier::new()`]
  (https://doc.rust-lang.org/stable/std/sync/struct.Barrier.html#method.new)

Cargo
-----

- [Stabilize lockfile v4](rust-lang/cargo#12852)
- [Respect `rust-version` when generating lockfile]
  (rust-lang/cargo#12861)
- [Control `--charset` via auto-detecting config value]
  (rust-lang/cargo#13337)
- [Support `target.<triple>.rustdocflags` officially]
  (rust-lang/cargo#13197)
- [Stabilize global cache data tracking]
  (rust-lang/cargo#13492)

Misc
----

- [rustdoc: add `--test-builder-wrapper` arg to support wrappers
  such as RUSTC_WRAPPER when building doctests]
  (rust-lang/rust#114651)

Compatibility Notes
-------------------

- [Many unsafe precondition checks now run for user code with debug
  assertions enabled] (rust-lang/rust#120594)
  This change helps users catch undefined behavior in their code,
  though the details of how much is checked are generally not
  stable.
- [riscv only supports split_debuginfo=off for now]
  (rust-lang/rust#120518)
- [Consistently check bounds on hidden types of `impl Trait`]
  (rust-lang/rust#121679)
- [Change equality of higher ranked types to not rely on subtyping]
  (rust-lang/rust#118247)
- [When called, additionally check bounds on normalized function return type]
  (rust-lang/rust#118882)
- [Expand coverage for `arithmetic_overflow` lint]
  (rust-lang/rust#119432)

Internal Changes
----------------

These changes do not affect any public interfaces of Rust, but they represent
significant improvements to the performance or internals of rustc and related
tools.

- [Update to LLVM 18](rust-lang/rust#120055)
- [Build `rustc` with 1CGU on `x86_64-pc-windows-msvc`]
  (rust-lang/rust#112267)
- [Build `rustc` with 1CGU on `x86_64-apple-darwin`]
  (rust-lang/rust#112268)
- [Introduce `run-make` V2 infrastructure, a `run_make_support`
  library and port over 2 tests as example]
  (rust-lang/rust#113026)
- [Windows: Implement condvar, mutex and rwlock using futex]
  (rust-lang/rust#121956)


Version 1.77.0 (2024-03-21)
==========================

- [Reveal opaque types within the defining body for exhaustiveness checking.]
  (rust-lang/rust#116821)
- [Stabilize C-string literals.]
  (rust-lang/rust#117472)
- [Stabilize THIR unsafeck.]
  (rust-lang/rust#117673)
- [Add lint `static_mut_refs` to warn on references to mutable statics.]
  (rust-lang/rust#117556)
- [Support async recursive calls (as long as they have indirection).]
  (rust-lang/rust#117703)
- [Undeprecate lint `unstable_features` and make use of it in the compiler.]
  (rust-lang/rust#118639)
- [Make inductive cycles in coherence ambiguous always.]
  (rust-lang/rust#118649)
- [Get rid of type-driven traversal in const-eval interning]
  (rust-lang/rust#119044),
  only as a [future compatiblity lint]
  (rust-lang/rust#122204) for now.
- [Deny braced macro invocations in let-else.]
  (rust-lang/rust#119062)

Compiler
--------

- [Include lint `soft_unstable` in future breakage reports.]
  (rust-lang/rust#116274)
- [Make `i128` and `u128` 16-byte aligned on x86-based targets.]
  (rust-lang/rust#116672)
- [Use `--verbose` in diagnostic output.]
  (rust-lang/rust#119129)
- [Improve spacing between printed tokens.]
  (rust-lang/rust#120227)
- [Merge the `unused_tuple_struct_fields` lint into `dead_code`.]
  (rust-lang/rust#118297)
- [Error on incorrect implied bounds in well-formedness check]
  (rust-lang/rust#118553),
  with a temporary exception for Bevy.
- [Fix coverage instrumentation/reports for non-ASCII source code.]
  (rust-lang/rust#119033)
- [Fix `fn`/`const` items implied bounds and well-formedness check.]
  (rust-lang/rust#120019)
- [Promote `riscv32{im|imafc}-unknown-none-elf` targets to tier 2.]
  (rust-lang/rust#118704)
- Add several new tier 3 targets:
  - [`aarch64-unknown-illumos`]
    (rust-lang/rust#112936)
  - [`hexagon-unknown-none-elf`]
    (rust-lang/rust#117601)
  - [`riscv32imafc-esp-espidf`]
    (rust-lang/rust#119738)
  - [`riscv32im-risc0-zkvm-elf`]
    (rust-lang/rust#117958)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

Libraries
---------

- [Implement `From<&[T; N]>` for `Cow<[T]>`.]
  (rust-lang/rust#113489)
- [Remove special-case handling of `vec.split_off
  (0)`.](rust-lang/rust#119917)

Stabilized APIs
---------------

- [`array::each_ref`]
  (https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_ref)
- [`array::each_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.array.html#method.each_mut)
- [`core::net`]
  (https://doc.rust-lang.org/stable/core/net/index.html)
- [`f32::round_ties_even`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#method.round_ties_even)
- [`f64::round_ties_even`]
  (https://doc.rust-lang.org/stable/std/primitive.f64.html#method.round_ties_even)
- [`mem::offset_of!`]
  (https://doc.rust-lang.org/stable/std/mem/macro.offset_of.html)
- [`slice::first_chunk`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.first_chunk)
- [`slice::first_chunk_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.first_chunk_mut)
- [`slice::split_first_chunk`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_first_chunk)
- [`slice::split_first_chunk_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_first_chunk_mut)
- [`slice::last_chunk`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.last_chunk)
- [`slice::last_chunk_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.last_chunk_mut)
- [`slice::split_last_chunk`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_last_chunk)
- [`slice::split_last_chunk_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_last_chunk_mut)
- [`slice::chunk_by`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.chunk_by)
- [`slice::chunk_by_mut`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.chunk_by_mut)
- [`Bound::map`]
  (https://doc.rust-lang.org/stable/std/ops/enum.Bound.html#method.map)
- [`File::create_new`]
  (https://doc.rust-lang.org/stable/std/fs/struct.File.html#method.create_new)
- [`Mutex::clear_poison`]
  (https://doc.rust-lang.org/stable/std/sync/struct.Mutex.html#method.clear_poison)
- [`RwLock::clear_poison`]
  (https://doc.rust-lang.org/stable/std/sync/struct.RwLock.html#method.clear_poison)

Cargo
-----

- [Extend the build directive syntax with `cargo::`.]
  (rust-lang/cargo#12201)
- [Stabilize metadata `id` format as `PackageIDSpec`.]
  (rust-lang/cargo#12914)
- [Pull out as `cargo-util-schemas` as a crate.]
  (rust-lang/cargo#13178)
- [Strip all debuginfo when debuginfo is not requested.]
  (rust-lang/cargo#13257)
- [Inherit jobserver from env for all kinds of runners.]
  (rust-lang/cargo#12776)
- [Deprecate rustc plugin support in cargo.]
  (rust-lang/cargo#13248)

Rustdoc
-----

- [Allows links in markdown headings.]
  (rust-lang/rust#117662)
- [Search for tuples and unit by type with `()`.]
  (rust-lang/rust#118194)
- [Clean up the source sidebar's hide button.]
  (rust-lang/rust#119066)
- [Prevent JS injection from `localStorage`.]
  (rust-lang/rust#120250)

Misc
----

- [Recommend version-sorting for all sorting in style guide.]
  (rust-lang/rust#115046)

Internal Changes
----------------

These changes do not affect any public interfaces of Rust, but they represent
significant improvements to the performance or internals of rustc and related
tools.

- [Add more weirdness to `weird-exprs.rs`.]
  (rust-lang/rust#119028)
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Unable to call variadic function with no named parameters even though it is useful since C23