Add --ignore-errors mismatch to gcov

Author: sea-bass

.github/workflows/ci.yaml

@@ -54,7 +54,7 @@ jobs:
         -DCMAKE_SHARED_LINKER_FLAGS=-fuse-ld=lld
         -DCMAKE_MODULE_LINKER_FLAGS=-fuse-ld=lld
         -DCMAKE_BUILD_TYPE=${{ matrix.env.CCOV && 'Debug' || 'Release'}}
-        -DCMAKE_CXX_FLAGS="-Werror $CXXFLAGS${{ matrix.env.CCOV && ' --coverage -O2 -fno-omit-frame-pointer' || ''}}"
+        -DCMAKE_CXX_FLAGS="-Werror $CXXFLAGS${{ matrix.env.CCOV && ' --coverage -O2 -fno-omit-frame-pointer --ignore-errors mismatch' || ''}}"
       UPSTREAM_CMAKE_ARGS: "-DCMAKE_CXX_FLAGS=''"
       DOWNSTREAM_CMAKE_ARGS: -DCMAKE_CXX_FLAGS="-Wall -Wextra"
       CCACHE_DIR: ${{ github.workspace }}/.ccache