Reenables building MacOS PyPI package

.github/workflows/merge.yaml

@@ -35,31 +35,12 @@ jobs:
   platform_matrix:
     uses: NWChemEx/.github/.github/workflows/platform_matrix.yaml@master
 
-  # SCF has a known, tracked, macOS-only segfault (see
-  # scf-macos-pybind11-segfault.md) -- skip publishing a macOS wheel until
-  # it's fixed, rather than ship a broken one. Filters platform_matrix's
-  # release_matrix down to ubuntu-latest only; drop this job and go back to
-  # consuming platform_matrix.outputs.release_matrix directly once macOS is
-  # re-enabled.
-  filter_release_matrix:
-    needs: platform_matrix
-    runs-on: ubuntu-latest
-    outputs:
-      release_matrix: ${{ steps.filter.outputs.release_matrix }}
-    steps:
-      - id: filter
-        shell: bash
-        run: |
-          filtered=$(echo '${{ needs.platform_matrix.outputs.release_matrix }}' \
-            | jq -c '[.[] | select(.os != "macos-14")]')
-          echo "release_matrix=$filtered" >> "$GITHUB_OUTPUT"
-
   build_pypi_dist:
-    needs: [tag-commit, filter_release_matrix]
+    needs: [tag-commit, platform_matrix]
     strategy:
       fail-fast: false
       matrix:
-        include: ${{ fromJSON(needs.filter_release_matrix.outputs.release_matrix) }}
+        include: ${{ fromJSON(needs.platform_matrix.outputs.release_matrix) }}
     runs-on: ${{ matrix.os }}
     steps:
       - name: Build PyPI Distribution

.licenserc.yaml

@@ -24,6 +24,6 @@ header:
     - src/scf/common/
     - src/scf/scf/
     - LICENSE
-    - build
+    - build*
 
   comment: never

cxx/src/scf/xc/grid_from_integratorxx.cpp

@@ -161,7 +161,19 @@ MODULE_CTOR(GridFromIntegratorXX) {
 }
 
 MODULE_RUN(GridFromIntegratorXX) {
-    const auto& [molecule] = pt::unwrap_inputs(inputs);
+    // Rebound to an ordinary reference because the dispatch lambda below
+    // captures it. Capturing a structured binding is C++20 (P1091); GCC
+    // accepts it, but AppleClang -- which is what builds the macOS release
+    // wheel, since cibuildwheel uses /usr/bin/clang++ -- still rejects it:
+    //
+    //   error: reference to local binding 'molecule' declared in enclosing
+    //   function 'scf::xc::GridFromIntegratorXX::run_'
+    //
+    // The dev matrix cannot catch this. It builds macOS with Homebrew
+    // clang-18 and gcc-14, both of which implement P1091; AppleClang is
+    // exercised only by the wheel build.
+    const auto& [molecule_input] = pt::unwrap_inputs(inputs);
+    const auto& molecule         = molecule_input;
 
     const auto& float_type = inputs.at("Float Type").value<std::string>();