Unpin Rust nightly in CI by ShaharNaveh · Pull Request #6022 · RustPython/RustPython

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Walkthrough

The CI workflow for the "miri" job was updated to use a generic "nightly" Rust toolchain channel instead of a fixed nightly version. The environment variable for the toolchain was renamed, and the test execution step was modified to set Miri-specific flags using an explicit environment map.

Changes

File(s)	Change Summary
.github/workflows/ci.yaml	Updated "miri" job to use "nightly" channel via `NIGHTLY_CHANNEL` variable; refactored Miri test step to use explicit `env` map and updated cargo command.

Sequence Diagram(s)

sequenceDiagram
    participant CI_Workflow
    participant GitHub_Action
    participant Cargo
    participant Miri

    CI_Workflow->>GitHub_Action: Set NIGHTLY_CHANNEL="nightly"
    GitHub_Action->>Cargo: Use toolchain from NIGHTLY_CHANNEL
    CI_Workflow->>Cargo: Run tests with MIRIFLAGS='-Zmiri-ignore-leaks'
    Cargo->>Miri: Execute tests under Miri with specified flags

Estimated code review effort

1 (~2 minutes)

Possibly related PRs

Pin rustc nightly to nightly-2025-07-18 for miri tests #5999: Reverses the pinning of the Rust nightly toolchain version, directly modifying the same CI workflow and environment variables.

Poem

The workflow hops to nightly's tune,
No date to chase, just "nightly" soon!
Miri flags set with care and cheer,
Our CI runs are crystal clear.
🐇✨
Onward we bound, with less to fear!

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