add miri to CI

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
           - { os: ubuntu-22.04,   rust-version: "1.77",  target: 'x86_64-unknown-linux-gnu'}
           # rust versions
           - { os: ubuntu-22.04,   rust-version: beta,    target: 'x86_64-unknown-linux-gnu'}
-          - { os: ubuntu-22.04,   rust-version: nightly, target: 'x86_64-unknown-linux-gnu'}
+          - { os: ubuntu-22.04,   rust-version: nightly, target: 'x86_64-unknown-linux-gnu', miri: true, components: ["miri"]} 
     defaults:
       run:
         shell: bash
@@ -66,6 +66,7 @@ jobs:
           rust-version: ${{ matrix.rust-version }}
           targets: ${{ matrix.target }}
           cache-context: ${{ matrix.os }}
+          components: ${{ matrix.components }}
 
       # Build and test.
       - name: Build library
@@ -73,6 +74,10 @@ jobs:
       - name: Test
         run: cargo test --target ${{ matrix.target }} ${{ matrix.test-args }} --all
 
+      - name: Check miri
+        if: matrix.miri
+        run: cargo miri test
+
       # On stable rust builds, build a binary and publish as a github actions
       # artifact. These binaries could be useful for testing the pipeline but
       # are only retained by github for 90 days.

tests/scryer/issues.rs

@@ -15,6 +15,7 @@ fn call_0() {
 // issue #2361
 #[serial]
 #[test]
+#[cfg_attr(miri, ignore = "blocked on helper.rs UB")]
 fn call_qualification() {
     load_module_test("tests-pl/issue2361-call-qualified.pl", "");
 }