…crum

core: simplify `Extend` for tuples

This is an alternative to rust-lang#137400. The current macro is incredibly complicated and introduces subtle bugs like calling the `extend_one` of the individual collections in backwards order. This PR drastically simplifies the macro by removing recursion and moving the specialization out of the macro. It also fixes the ordering issue described above (I've stolen the test of the new behaviour from rust-lang#137400). Additionally, the 1-tuple is now special-cased to allow taking advantage of the well-optimized `Extend` implementations of the individual collection.

Rollup of 12 pull requests

Successful merges:

 - #138799 (core: simplify `Extend` for tuples)
 - #146692 (Save x.py's help text for saving output time)
 - #147168 (Don't unconditionally build alloc for `no-std` targets)
 - #147178 ([DebugInfo] Improve formatting of MSVC enum struct variants)
 - #147240 (Add an ACP list item to the library tracking issue template)
 - #147246 (Explain not existed key in BTreeMap::split_off)
 - #147393 (Extract most code from `define_feedable!`)
 - #147495 (Update wasm-component-ld to 0.5.18)
 - #147503 (Fix documentation of Instant::now on mac)
 - #147541 (Change int-to-ptr transmute lowering back to inttoptr)
 - #147549 (Replace `LLVMRustContextCreate` with normal LLVM-C API calls)
 - #147596 (Adjust the Arm targets in CI to reflect latest changes)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup of 8 pull requests

Successful merges:

 - #138799 (core: simplify `Extend` for tuples)
 - #145897 (Rehome 30 `tests/ui/issues/` tests to other subdirectories under `tests/ui/` [#4 of Batch #2])
 - #146692 (Save x.py's help text for saving output time)
 - #147240 (Add an ACP list item to the library tracking issue template)
 - #147246 (Explain not existed key in BTreeMap::split_off)
 - #147393 (Extract most code from `define_feedable!`)
 - #147503 (Fix documentation of Instant::now on mac)
 - #147549 (Replace `LLVMRustContextCreate` with normal LLVM-C API calls)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of #138799 - joboet:extend-tuple, r=Mark-Simulacrum

core: simplify `Extend` for tuples

This is an alternative to #137400. The current macro is incredibly complicated and introduces subtle bugs like calling the `extend_one` of the individual collections in backwards order. This PR drastically simplifies the macro by removing recursion and moving the specialization out of the macro. It also fixes the ordering issue described above (I've stolen the test of the new behaviour from #137400). Additionally, the 1-tuple is now special-cased to allow taking advantage of the well-optimized `Extend` implementations of the individual collection.

…crum

core: simplify `Extend` for tuples

This is an alternative to rust-lang#137400. The current macro is incredibly complicated and introduces subtle bugs like calling the `extend_one` of the individual collections in backwards order. This PR drastically simplifies the macro by removing recursion and moving the specialization out of the macro. It also fixes the ordering issue described above (I've stolen the test of the new behaviour from rust-lang#137400). Additionally, the 1-tuple is now special-cased to allow taking advantage of the well-optimized `Extend` implementations of the individual collection.

This MR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [rust](https://github.com/rust-lang/rust) | minor | `1.91.1` -> `1.92.0` |

MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot).

**Proposed changes to behavior should be submitted there as MRs.**

---

### Release Notes

<details>
<summary>rust-lang/rust (rust)</summary>

### [`v1.92.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1920-2025-12-11)

[Compare Source](rust-lang/rust@1.91.1...1.92.0)

\==========================

<a id="1.92.0-Language"></a>

## Language

- [Document `MaybeUninit` representation and validity](rust-lang/rust#140463)
- [Allow `&raw [mut | const]` for union field in safe code](rust-lang/rust#141469)
- [Prefer item bounds of associated types over where-bounds for auto-traits and `Sized`](rust-lang/rust#144064)
- [Do not materialize `X` in `[X; 0]` when `X` is unsizing a const](rust-lang/rust#145277)
- [Support combining `#[track_caller]` and `#[no_mangle]` (requires every declaration specifying `#[track_caller]` as well)](rust-lang/rust#145724)
- [Make never type lints `never_type_fallback_flowing_into_unsafe` and `dependency_on_unit_never_type_fallback` deny-by-default](rust-lang/rust#146167)
- [Allow specifying multiple bounds for same associated item, except in trait objects](rust-lang/rust#146593)
- [Slightly strengthen higher-ranked region handling in coherence](rust-lang/rust#146725)
- [The `unused_must_use` lint no longer warns on `Result<(), Uninhabited>` (for instance, `Result<(), !>`), or `ControlFlow<Uninhabited, ()>`](rust-lang/rust#147382). This avoids having to check for an error that can never happen.

<a id="1.92.0-Compiler"></a>

## Compiler

- [Make `mips64el-unknown-linux-muslabi64` link dynamically](rust-lang/rust#146858)
- [Remove current code for embedding command-line args in PDB](rust-lang/rust#147022)
  Command-line information is typically not needed by debugging tools, and the removed code
  was causing problems for incremental builds even on targets that don't use PDB debuginfo.

<a id="1.92.0-Libraries"></a>

## Libraries

- [Specialize `Iterator::eq{_by}` for `TrustedLen` iterators](rust-lang/rust#137122)
- [Simplify `Extend` for tuples](rust-lang/rust#138799)
- [Added details to `Debug` for `EncodeWide`](rust-lang/rust#140153).
- [`iter::Repeat::last`](rust-lang/rust#147258) and [`count`](rust-lang/rust#146410) will now panic, rather than looping infinitely.

<a id="1.92.0-Stabilized-APIs"></a>

## Stabilized APIs

- [`NonZero<u{N}>::div_ceil`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.div_ceil)
- [`Location::file_as_c_str`](https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.file_as_c_str)
- [`RwLockWriteGuard::downgrade`](https://doc.rust-lang.org/stable/std/sync/struct.RwLockWriteGuard.html#method.downgrade)
- [`Box::new_zeroed`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.new_zeroed)
- [`Box::new_zeroed_slice`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.new_zeroed_slice)
- [`Rc::new_zeroed`](https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.new_zeroed)
- [`Rc::new_zeroed_slice`](https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.new_zeroed_slice)
- [`Arc::new_zeroed`](https://doc.rust-lang.org/stable/std/sync/struct.Arc.html#method.new_zeroed)
- [`Arc::new_zeroed_slice`](https://doc.rust-lang.org/stable/std/sync/struct.Arc.html#method.new_zeroed_slice)
- [`btree_map::Entry::insert_entry`](https://doc.rust-lang.org/stable/std/collections/btree_map/enum.Entry.html#method.insert_entry)
- [`btree_map::VacantEntry::insert_entry`](https://doc.rust-lang.org/stable/std/collections/btree_map/struct.VacantEntry.html#method.insert_entry)
- [`impl Extend<proc_macro::Group> for proc_macro::TokenStream`](https://doc.rust-lang.org/stable/proc_macro/struct.TokenStream.html#impl-Extend%3CGroup%3E-for-TokenStream)
- [`impl Extend<proc_macro::Literal> for proc_macro::TokenStream`](https://doc.rust-lang.org/stable/proc_macro/struct.TokenStream.html#impl-Extend%3CLiteral%3E-for-TokenStream)
- [`impl Extend<proc_macro::Punct> for proc_macro::TokenStream`](https://doc.rust-lang.org/stable/proc_macro/struct.TokenStream.html#impl-Extend%3CPunct%3E-for-TokenStream)
- [`impl Extend<proc_macro::Ident> for proc_macro::TokenStream`](https://doc.rust-lang.org/stable/proc_macro/struct.TokenStream.html#impl-Extend%3CIdent%3E-for-TokenStream)

These previously stable APIs are now stable in const contexts:

- [`<[_]>::rotate_left`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.rotate_left)
- [`<[_]>::rotate_right`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.rotate_right)

<a id="1.92.0-Cargo"></a>

## Cargo

- [Added a new chapter](rust-lang/cargo#16119) to the Cargo book, ["Optimizing Build Performance"](https://doc.rust-lang.org/stable/cargo/guide/build-performance.html).

<a id="1.92.0-Rustdoc"></a>

## Rustdoc

- [If a trait item appears in rustdoc search, hide the corresponding impl items](rust-lang/rust#145898).  Previously a search for "last" would show both `Iterator::last` as well as impl methods like `std::vec::IntoIter::last`.  Now these impl methods will be hidden, freeing up space for inherent methods like `BTreeSet::last`.
- [Relax rules for identifiers in search](rust-lang/rust#147860).  Previously you could only search for identifiers that were valid in rust code, now searches only need to be valid as part of an identifier.  For example, you can now perform a search that starts with a digit.

<a id="1.92.0-Compatibility-Notes"></a>

## Compatibility Notes

- [Fix backtraces with `-C panic=abort` on Linux by generating unwind tables by default](rust-lang/rust#143613). Build with `-C force-unwind-tables=no` to keep omitting unwind tables.

* As part of the larger effort refactoring compiler built-in attributes and their diagnostics, [the future-compatibility lint `invalid_macro_export_arguments` is upgraded to deny-by-default and will be reported in dependencies too.](rust-lang/rust#143857)
* [Update the minimum external LLVM to 20](rust-lang/rust#145071)
* [Prevent downstream `impl DerefMut for Pin<LocalType>`](rust-lang/rust#145608)
* [Don't apply temporary lifetime extension rules to the arguments of non-extended `pin!` and formatting macros](rust-lang/rust#145838)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this MR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this MR, check this box

---

This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi40Ny4wIiwidXBkYXRlZEluVmVyIjoiNDIuNDcuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiUmVub3ZhdGUgQm90Il19-->

Pkgsrc changes:
 * Update version & checksums.
 * Adapt openssl-src patches to minor version update.

Noteable failures at the time of commit:
 * The cross-build for sparc64 fails, not yet reported.

Upstream changes relative to 1.91.1:

Version 1.92.0 (2025-12-11)
==========================

Language
--------
- [Document `MaybeUninit` representation and validity]
  (rust-lang/rust#140463)
- [Allow `&raw [mut | const]` for union field in safe code]
  (rust-lang/rust#141469)
- [Prefer item bounds of associated types over where-bounds for
  auto-traits and `Sized`]
  (rust-lang/rust#144064)
- [Do not materialize `X` in `[X; 0]` when `X` is unsizing a const]
  (rust-lang/rust#145277)
- [Support combining `#[track_caller]` and `#[no_mangle]` (requires
  every declaration specifying `#[track_caller]` as well)]
  (rust-lang/rust#145724)
- [Make never type lints `never_type_fallback_flowing_into_unsafe`
  and `dependency_on_unit_never_type_fallback` deny-by-default]
  (rust-lang/rust#146167)
- [Allow specifying multiple bounds for same associated item, except
  in trait objects] (rust-lang/rust#146593)
- [Slightly strengthen higher-ranked region handling in coherence]
  (rust-lang/rust#146725)
- [The `unused_must_use` lint no longer warns on `Result<(),
  Uninhabited>` (for instance, `Result<(), !>`), or `ControlFlow<Uninhabited,
  ()>`](rust-lang/rust#147382). This avoids
  having to check for an error that can never happen.

Compiler
--------
- [Make `mips64el-unknown-linux-muslabi64` link dynamically]
  (rust-lang/rust#146858)
- [Remove current code for embedding command-line args in PDB]
  (rust-lang/rust#147022)
  Command-line information is typically not needed by debugging
  tools, and the removed code was causing problems for incremental
  builds even on targets that don't use PDB debuginfo.

Libraries
---------
- [Specialize `Iterator::eq{_by}` for `TrustedLen` iterators]
  (rust-lang/rust#137122)
- [Simplify `Extend` for tuples]
  (rust-lang/rust#138799)
- [Added details to `Debug` for `EncodeWide`]
  (rust-lang/rust#140153).
- [`iter::Repeat::last`]
  (rust-lang/rust#147258) and [`count`]
  (rust-lang/rust#146410) will now panic,
  rather than looping infinitely.

Stabilized APIs
---------------
- [`NonZero<u{N}>::div_ceil`]
  (https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.div_ceil)
- [`Location::file_as_c_str`]
  (https://doc.rust-lang.org/stable/std/panic/struct.Location.html#method.file_as_c_str)
- [`RwLockWriteGuard::downgrade`]
  (https://doc.rust-lang.org/stable/std/sync/struct.RwLockWriteGuard.html#method.downgrade)
- [`Box::new_zeroed`]
  (https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.new_zeroed)
- [`Box::new_zeroed_slice`]
  (https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.new_zeroed_slice)
- [`Rc::new_zeroed`]
  (https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.new_zeroed)
- [`Rc::new_zeroed_slice`]
  (https://doc.rust-lang.org/stable/std/rc/struct.Rc.html#method.new_zeroed_slice)
- [`Arc::new_zeroed`]
  (https://doc.rust-lang.org/stable/std/sync/struct.Arc.html#method.new_zeroed)
- [`Arc::new_zeroed_slice`]
  (https://doc.rust-lang.org/stable/std/sync/struct.Arc.html#method.new_zeroed_slice)
- [`btree_map::Entry::insert_entry`]
  (https://doc.rust-lang.org/stable/std/collections/btree_map/enum.Entry.html#method.insert_entry)
- [`btree_map::VacantEntry::insert_entry`]
  (https://doc.rust-lang.org/stable/std/collections/btree_map/struct.VacantEntry.html#method.insert_entry)
- [`impl Extend<proc_macro::Group> for proc_macro::TokenStream`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.TokenStream.html#impl-Extend%3CGroup%3E-for-TokenStream)
- [`impl Extend<proc_macro::Literal> for proc_macro::TokenStream`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.TokenStream.html#impl-Extend%3CLiteral%3E-for-TokenStream)
- [`impl Extend<proc_macro::Punct> for proc_macro::TokenStream`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.TokenStream.html#impl-Extend%3CPunct%3E-for-TokenStream)
- [`impl Extend<proc_macro::Ident> for proc_macro::TokenStream`]
  (https://doc.rust-lang.org/stable/proc_macro/struct.TokenStream.html#impl-Extend%3CIdent%3E-for-TokenStream)

These previously stable APIs are now stable in const contexts:

- [`<[_]>::rotate_left`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.rotate_left)
- [`<[_]>::rotate_right`]
  (https://doc.rust-lang.org/stable/std/primitive.slice.html#method.rotate_right)

Cargo
-----
- [Added a new chapter]
  (rust-lang/cargo#16119) to the Cargo
  book, ["Optimizing Build Performance"]
  (https://doc.rust-lang.org/stable/cargo/guide/build-performance.html).

Rustdoc
-----
- [If a trait item appears in rustdoc search, hide the corresponding
  impl items](rust-lang/rust#145898).
  Previously a search for "last" would show both `Iterator::last` as
  well as impl methods like `std::vec::IntoIter::last`.  Now these
  impl methods will be hidden, freeing up space for inherent methods
  like `BTreeSet::last`.

- [Relax rules for identifiers in search]
  (rust-lang/rust#147860).  Previously you
  could only search for identifiers that were valid in rust code,
  now searches only need to be valid as part of an identifier.  For
  example, you can now perform a search that starts with a digit.

Compatibility Notes
-------------------
* [Fix backtraces with `-C panic=abort` on Linux by generating
  unwind tables by default]
  (rust-lang/rust#143613). Build with `-C
  force-unwind-tables=no` to keep omitting unwind tables.
- As part of the larger effort refactoring compiler built-in
  attributes and their diagnostics, [the future-compatibility lint
  `invalid_macro_export_arguments` is upgraded to deny-by-default
  and will be reported in dependencies too.]
  (rust-lang/rust#143857)
- [Update the minimum external LLVM to 20]
  (rust-lang/rust#145071)
- [Prevent downstream `impl DerefMut for Pin<LocalType>`]
  (rust-lang/rust#145608)
- [Don't apply temporary lifetime extension rules to the arguments
  of non-extended `pin!` and formatting macros]
  (rust-lang/rust#145838)