fix benchmarks ci (#907)

Closes #836

.github/workflows/ci.yml

@@ -102,7 +102,9 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: "recursive"
-      - uses: dtolnay/rust-toolchain@stable
+      # We use nightly for now so that we can pass RUSTFLAGS below to work around
+      # https://github.com/geoarrow/geoarrow-rs/issues/716
+      - uses: dtolnay/rust-toolchain@nightly
       - uses: Swatinem/rust-cache@v2
       - uses: prefix-dev/[email protected]
         with:
@@ -115,6 +117,6 @@ jobs:
           echo "PKG_CONFIG_PATH=$(pwd)/build/.pixi/envs/default/lib/pkgconfig" >> "$GITHUB_ENV"
           echo "LD_LIBRARY_PATH=$(pwd)/build/.pixi/envs/default/lib" >> "$GITHUB_ENV"
       - name: Build benchmarks with no features
-        run: cargo bench --no-run
+        run: RUSTFLAGS="-Zinline-mir=no" cargo bench --no-run
       - name: Build benchmarks with all features
-        run: cargo bench --no-run --all-features
+        run: RUSTFLAGS="-Zinline-mir=no" cargo bench --no-run --all-features