Skip to content

Tracking Issue for VaArgSafe in bounds (c_variadic_va_arg_safe) #162911

Open
Open
Tracking Issue for VaArgSafe in bounds (c_variadic_va_arg_safe)#162911
Labels
C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCS-tracking-design-concernsStatus: There are blocking design concerns.T-libsRelevant to the library team, which will review and decide on the PR/issue.

Description

@maxdexh
maxdexh
opened on Sep 17, 2026

Feature gate: #![feature(c_variadic_va_arg_safe)]

This is a tracking issue for the VaArgSafe trait (part of rust-lang/rfcs#2137).
See also the tracking issue for c_variadic, where the API of this feature was intially stabilized on beta: #44930
Zulip stream: #t-libs > Implementing `VaArgSafe` on references is a breaking change

Public API

// core::ffi, reexported in std::ffi
pub impl(self) unsafe trait VaArgSafe {}

Steps / History

Unresolved Questions

Footnotes

  1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩

Activity

  1. maxdexh
    added
    C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFC
    T-libsRelevant to the library team, which will review and decide on the PR/issue.
    S-tracking-unimplementedStatus: The feature has not been implemented.
    on Sep 17, 2026
  2. maxdexh
    changed the title [-]Tracking Issue for `VaArgSafe` in bounds (`v_variadic_va_arg_safe`)[/-] [+]Tracking Issue for `VaArgSafe` in bounds (`c_variadic_va_arg_safe`)[/+] on Sep 17, 2026

  3. maxdexh commented on Sep 17, 2026

    @maxdexh
    maxdexh
    on Sep 17, 2026 · Hidden as resolved
    Author
  4. rustbot
    added
    S-tracking-design-concernsStatus: There are blocking design concerns.
    and removed
    S-tracking-unimplementedStatus: The feature has not been implemented.
    on Sep 17, 2026
  5. rust-bors
    added a commit that references this issue on Sep 17, 2026

    Auto merge of #162909 - maxdexh:claw-back-va-arg-safe, r=clarfonthey

    ed30c2c
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCS-tracking-design-concernsStatus: There are blocking design concerns.T-libsRelevant to the library team, which will review and decide on the PR/issue.

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions