https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80605
Bug ID: 80605 Summary: Bad is_standard_layout result with empty base classes Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: lloda at bluewin dot ch Target Milestone: --- gcc 7.1.0 prints False for the following program. gcc 6.3.0 and others print True. // $CXX -std=c++14 -o stdlayout stdlayout.C #include <iostream> struct BaseBase {}; struct Base: BaseBase {}; struct Type: public Base { int x; }; int main() { std::cout << std::boolalpha << std::is_standard_layout<Type>::value << '\n'; }