Remove only test_smart_ptr.cpp to see what happens.

Author: rwgk

.github/workflows/ci.yml

@@ -416,7 +416,7 @@ jobs:
                             -DCMAKE_CXX_STANDARD=11 \
                             -DPYTHON_EXECUTABLE=$(python3 -c "import sys; print(sys.executable)") \
                             -DCMAKE_CXX_FLAGS="-Wc,--pending_instantiations=0" \
-                            -DPYBIND11_TEST_FILTER="test_smart_ptr.cpp;test_virtual_functions.cpp"
+                            -DPYBIND11_TEST_FILTER="test_virtual_functions.cpp"
 
     # Building before installing Pip should produce a warning but not an error
     - name: Build