[Bug c++/69138] New: Woverflow not triggered for constexpr within class

[krzysztof.wesolowski at rainlabs dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69138

            Bug ID: 69138
           Summary: Woverflow not triggered for constexpr within class
           Product: gcc
           Version: 5.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: krzysztof.wesolowski at rainlabs dot pl
  Target Milestone: ---

When i have following code:

#include <stdint.h>
static constexpr uint8_t small_global = 0xFFFFFFFF;

class A {
    static constexpr uint8_t small_within_class = 0xFFFFFFFF;
};


template<typename T>
class B {
    static constexpr uint8_t small_within_templated_class = 0xFFFFFFFF;
};

B<int> b;

It only produces warnings for first two cases.

Online compiler with test case: https://goo.gl/aGL0n4