FAILED: CMakeFiles/insights.dir/FunctionDeclHandler.cpp.o
ccache /usr/bin/c++   -I/usr/local/clang+llvm-7.0.1-x86_64-linux-gnu-ubuntu-18.04/include -I/tmp/cppinsights/. -Igenerated -isystem/usr/local/clang+llvm-7.0.1-x86_64-linux-gnu-ubuntu-18.04/include  -fPIC -fvisibility-inlines-hidden -Werror=date-time  -std=c++11 -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long  -Wnon-virtual-dtor -Wdelete-non-virtual-dtor  -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -fno-rtti -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -std=c++1z -Wextra -Wold-style-cast -Werror -Wsuggest-override -Wuseless-cast -Wno-overloaded-virtual -MD -MT CMakeFiles/insights.dir/FunctionDeclHandler.cpp.o -MF CMakeFiles/insights.dir/FunctionDeclHandler.cpp.o.d -o CMakeFiles/insights.dir/FunctionDeclHandler.cpp.o -c /tmp/cppinsights/FunctionDeclHandler.cpp
/tmp/cppinsights/FunctionDeclHandler.cpp: In member function ‘virtual void clang::insights::FunctionDeclHandler::run(const clang::ast_matchers::MatchFinder::MatchResult&)’:                                                                                                   
/tmp/cppinsights/FunctionDeclHandler.cpp:105:28: error: unused variable ‘usingShadow’ [-Werror=unused-variable]
             if(const auto* usingShadow = dyn_cast_or_null<ConstructorUsingShadowDecl>(shadow)) {
                            ^~~~~~~~~~~
cc1plus: all warnings being treated as errors

g++ --version
g++ (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0
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