miri.yml

name: Miri
on:
  push:
  pull_request:
concurrency:
  group: ${{ github.repository }}-${{ github.ref }}-${{ github.head_ref }}-${{ github.workflow }}
  # Only cancel in PR mode.  In push mode, don't cancel so we don't see spurious test "failures",
  # and we get coverage reports on Coveralls for every push.
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

jobs:
  miri:
    if: github.repository_owner == 'Qiskit'
    name: Miri
    runs-on: ubuntu-latest
    env:
      RUSTUP_TOOLCHAIN: nightly

    steps:
      - uses: actions/checkout@v4

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@nightly
        with:
          components: miri

      - name: Prepare Miri
        run: |
          set -e
          # Some of our dependencies aren't Miri-safe with their current release versions.  These
          # need overriding with known-good versions to run against until the Miri-safe versions are
          # released and updated in our Cargo.lock.
          cat >>Cargo.toml <<EOF

          [patch.crates-io]
          crossbeam-epoch = { git = "https://github.com/crossbeam-rs/crossbeam", rev = "9e859610" }
          EOF
          cargo miri setup

      - name: Run Miri
        run: cargo miri test
        env:
          # - `tree-borrows` is required for crossbeam components.
          # - `symbolic-alignment-check` is extra checking.
          # - `strict-provenance` is extra checking.
          MIRIFLAGS: '-Zmiri-tree-borrows -Zmiri-symbolic-alignment-check -Zmiri-strict-provenance'