Upgrade Rust toolchain to nightly-2026-02-12#4670
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Advance from nightly-2026-02-06 to nightly-2026-02-12. One source change is required (first needed at nightly-2026-02-07); every intermediate nightly up to 02-12 then builds and passes the regression with no further changes. rust-lang/rust removed the error-code `Registry` from the diagnostics emitter: `rustc_errors::registry` is gone and `Emitter::emit_diagnostic` no longer takes a registry argument. Drop the `ErrorRegistry` import/creation in the panic hook and call `emit_diagnostic(diagnostic)` with a single argument. Co-authored-by: Kiro <kiro-agent@users.noreply.github.com>
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Pull request overview
Updates Kani’s pinned Rust nightly toolchain and adapts the compiler session JSON panic hook to a rustc API change (removal of the diagnostics Registry argument), keeping Kani building and emitting diagnostics correctly on newer nightlies.
Changes:
- Bump
rust-toolchain.tomlfromnightly-2026-02-06tonightly-2026-02-12. - Remove
rustc_errors::registry::Registryusage and update the JSON panic hook to callemit_diagnostic(diagnostic)with the new signature.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| rust-toolchain.toml | Pins the repo to nightly-2026-02-12. |
| kani-compiler/src/session.rs | Updates JSON panic hook diagnostics emission to match the new rustc emitter API (no registry argument). |
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Advance from nightly-2026-02-06 to nightly-2026-02-12. One source change is required (first needed at nightly-2026-02-07); every intermediate nightly up to 02-12 then builds and passes the regression with no further changes.
rust-lang/rust removed the error-code
Registryfrom the diagnostics emitter:rustc_errors::registryis gone andEmitter::emit_diagnosticno longer takes a registry argument. Drop theErrorRegistryimport/creation in the panic hook and callemit_diagnostic(diagnostic)with a single argument.By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.