... CXX insets/InsetSpecialChar.o insets/InsetSpecialChar.cpp: In function 'std::string lyx::{anonymous}::specialCharKindToXMLEntity(lyx::InsetSpecialChar::Kind)': insets/InsetSpecialChar.cpp:569:1: warning: control reaches end of non-void function [-Wreturn-type] 569 | } | ^ ...