https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83374
Bug ID: 83374
Summary: Bad std::is_standard_layout with two base class
subobjects of the same type
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: alex.mikhalevich at gmail dot com
Target Milestone: ---
Steps to reproduce:
1. Compile the following code with gcc 6.3.0 (maybe affects other versions, I
was not able to check):
#include <iostream>
#include <type_traits>
struct Q {};
struct S : Q {};
struct T : Q {};
struct NonPod : S, T {};
int main(int argc, char** argv) {
std::cout << (bool)std::is_pod<NonPod>::value << " ";
std::cout << (bool)std::is_standard_layout<NonPod>::value << std::endl;
return 0;
}
2. Run the result program.
Expected result:
0 0 (the NonPod structure is not a standard-layout class as described here:
http://en.cppreference.com/w/cpp/concept/StandardLayoutType).
Actual result:
1 1
