Peter Maydell <peter.mayd...@linaro.org> writes: > I've noticed that the tests/test-qapi-visit.c code provokes the following > complaint from clang's -fsanitize=undefined undefined-behaviour > checker when you run 'make check': > > tests/test-qapi-visit.c:462:33: runtime error: member access within > null pointer of type 'UserDefA' (aka 'struct UserDefA') > > which is the line > visit_type_bool(m, &(*obj)->boolean, "boolean", &err); > in static void visit_type_UserDefA_fields(Visitor *m, UserDefA ** obj, > Error **errp). > > It's presumably complaining because we've passed in an obj which > points to NULL (ie *obj == NULL). The callsite in visit_type_UserDefA() > checks for this and doesn't call the visit..fields function. The callsite > in visit_type_UserDefFlatUnion doesn't. > > Unfortunately this is all autogenerated C so I'm not sure where exactly > the bug should be fixed. Could one of you have a look at it?
My local clang doesn't complain. May I have your clang version, exact invocation and output?
