Recommended update for rust1.88

Announcement ID:	SUSE-RU-2025:02341-1
Release Date:	2025-07-17T10:05:04Z
Rating:	moderate
References:	bsc#1243588
Affected Products:	openSUSE Leap 15.6 SUSE Linux Enterprise Desktop 15 SP6 SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Real Time 15 SP6 SUSE Linux Enterprise Real Time 15 SP7 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP7 SUSE Package Hub 15 15-SP6 SUSE Package Hub 15 15-SP7

An update that has one fix can now be installed.

Description:

This update for rust1.88 fixes the following issues:

• bsc#1243588 - Update changelog to remove hyphen as a line break for source validator

Version 1.88.0 (2025-06-26)

Language

• Stabilize #![feature(let_chains)] in the 2024 edition. This feature allows &&-chaining let statements inside if and while, allowing intermixture with boolean expressions. The patterns inside the let sub-expressions can be irrefutable or refutable.
• Stabilize #![feature(naked_functions)]. Naked functions allow writing functions with no compiler-generated epilogue and prologue, allowing full control over the generated assembly for a particular function.
• Stabilize #![feature(cfg_boolean_literals)]. This allows using boolean literals as cfg predicates, e.g. #[cfg(true)] and #[cfg(false)].
• Fully de-stabilize the #[bench] attribute. Usage of #[bench] without #![feature(custom_test_frameworks)] already triggered a deny-by-default future-incompatibility lint since Rust 1.77, but will now become a hard error.
• Add warn-by-default dangerous_implicit_autorefs lint against implicit autoref of raw pointer dereference. The lint will be bumped to deny-by-default in the next version of Rust.
• Add invalid_null_arguments lint to prevent invalid usage of null pointers. This lint is uplifted from clippy::invalid_null_ptr_usage.
• Change trait impl candidate preference for builtin impls and trivial where-clauses.
• Check types of generic const parameter defaults

Compiler

• Stabilize -Cdwarf-version for selecting the version of DWARF debug information to generate.

Platform Support

• Demote i686-pc-windows-gnu to Tier 2. Refer to Rust's platform support page for more information on Rust's tiered platform support.

Libraries

• Remove backticks from #[should_panic] test failure message.
• Guarantee that [T; N]::from_fn is generated in order of increasing indices., for those passing it a stateful closure.
• The libtest flag --nocapture is deprecated in favor of the more consistent --no-capture flag.
• Guarantee that {float}::NAN is a quiet NaN.

Stabilized APIs

• Cell::update
• impl Default for *const T
• impl Default for *mut T
• HashMap::extract_if
• HashSet::extract_if
• proc_macro::Span::line
• proc_macro::Span::column
• proc_macro::Span::start
• proc_macro::Span::end
• proc_macro::Span::file
• proc_macro::Span::local_file These previously stable APIs are now stable in const contexts:
• NonNull<T>::replace
• <*mut T>::replace
• std::ptr::swap_nonoverlapping
• Cell::{replace, get, get_mut, from_mut, as_slice_of_cells}

Cargo

• Stabilize automatic garbage collection.
• use zlib-rs for gzip compression in rust code

Rustdoc

• Doctests can be ignored based on target names using ignore-* attributes.
• Stabilize the --test-runtool and --test-runtool-arg CLI options to specify a program (like qemu) and its arguments to run a doctest.

Compatibility Notes

• Finish changing the internal representation of pasted tokens. Certain invalid declarative macros that were previously accepted in obscure circumstances are now correctly rejected by the compiler. Use of a tt fragment specifier can often fix these macros.
• Fully de-stabilize the #[bench] attribute. Usage of #[bench] without #![feature(custom_test_frameworks)] already triggered a deny-by-default future-incompatibility lint since Rust 1.77, but will now become a hard error.
• Fix borrow checking some always-true patterns. The borrow checker was overly permissive in some cases, allowing programs that shouldn't have compiled.
• Update the minimum external LLVM to 19.
• Make it a hard error to use a vector type with a non-Rust ABI without enabling the required target feature.

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

• openSUSE Leap 15.6
  zypper in -t patch openSUSE-SLE-15.6-2025-2341=1
• SUSE Package Hub 15 15-SP6
  zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP6-2025-2341=1
• SUSE Package Hub 15 15-SP7
  zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2025-2341=1

Package List:

• openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64)
  • rust-cbindgen-0.28.0+git0-150200.6.7.2
• SUSE Package Hub 15 15-SP6 (aarch64 ppc64le s390x x86_64)
  • rust-cbindgen-0.28.0+git0-150200.6.7.2
• SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x x86_64)
  • rust-cbindgen-0.28.0+git0-150200.6.7.2

References:

• https://bugzilla.suse.com/show_bug.cgi?id=1243588