Cleanup CI config

.github/workflows/linux.yml

@@ -16,7 +16,6 @@ jobs:
         shared: [""]
         include:
           - cxx: g++-4.9
-          - cxx: clang++-3.6
           - cxx: g++-11
             build_type: Debug
             std: 14
@@ -37,6 +36,8 @@ jobs:
             build_type: Release
             std: 23
             install: sudo apt install g++-14
+            gen: -G Ninja
+          - cxx: clang++-3.6
           - cxx: clang++-11
             build_type: Debug
             std: 17
@@ -64,6 +65,7 @@ jobs:
             std: 20
             cxxflags: -stdlib=libc++
             install: sudo apt install clang-20 libc++-20-dev libc++abi-20-dev
+            gen: -G Ninja
 
     steps:
     - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
@@ -174,29 +176,16 @@ jobs:
         CXX: ${{matrix.cxx}}
         CXXFLAGS: ${{matrix.cxxflags}} ${{matrix.cxxflags_extra}}
       run: |
-        cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+        cmake ${{matrix.gen}} \
+              -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
               -DCMAKE_CXX_STANDARD=${{matrix.std}} \
               -DCMAKE_CXX_VISIBILITY_PRESET=hidden \
               -DCMAKE_VISIBILITY_INLINES_HIDDEN=ON \
-              -DFMT_DOC=OFF -DFMT_PEDANTIC=ON -DFMT_WERROR=ON \
-              ${{matrix.fuzz}} ${{matrix.shared}} $GITHUB_WORKSPACE
-      if: ${{ matrix.cxx != 'clang++-20' && matrix.cxx != 'g++-14' }}
-
-    - name: Configure-Modules
-      working-directory: ${{runner.workspace}}/build
-      env:
-        CXX: ${{matrix.cxx}}
-        CXXFLAGS: ${{matrix.cxxflags}}
-      run: |
-        cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
-              -DCMAKE_CXX_STANDARD=${{matrix.std}} \
-              -DCMAKE_CXX_EXTENSIONS=OFF \
-              -G Ninja \
-              -DCMAKE_CXX_VISIBILITY_PRESET=hidden \
-              -DCMAKE_VISIBILITY_INLINES_HIDDEN=ON \
               -DFMT_DOC=OFF -DFMT_PEDANTIC=ON \
-              ${{matrix.fuzz}} ${{matrix.shared}} $GITHUB_WORKSPACE
-      if: ${{ matrix.cxx == 'clang++-20' || matrix.cxx == 'g++-14' }}
+              -DFMT_WERROR=ON \
+              ${{matrix.fuzz}} \
+              ${{matrix.shared}} \
+              $GITHUB_WORKSPACE
 
     - name: Build
       working-directory: ${{runner.workspace}}/build

test/ranges-test.cc

@@ -710,10 +710,17 @@ struct codec_mask {
   int except = 0;
 };
 
+// A named functor instead of a lambda to avoid -Wsubobject-linkage: a lambda
+// gives the filter_view type internal linkage, which propagates to the
+// formatter base class via format_as.
+struct not_equal {
+  int value;
+  bool operator()(int c) const { return c != value; }
+};
+
 auto format_as(codec_mask mask) {
-  // Careful not to capture param by reference here, it will dangle.
   return codec_mask::codecs |
-         std::views::filter([mask](auto c) { return c != mask.except; });
+         std::views::filter(not_equal{mask.except});
 }
 }  // namespace views_filter_view_test