This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 112e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
[Adopted as a DR at the November, 2019 meeting.]
According to 7.7 [expr.const] paragraph 3,
An object or reference is usable in constant expressions if it is
a complete temporary object of non-volatile const-qualified integral or enumeration type that is initialized with a constant expression.
The phrase “initialized with a constant expression” is not defined (which causes problems with std::is_constant_evaluated). It would be better to use “is constant-initialized” instead.
Proposed resolution (October, 2019):
This issue is resolved by the resolution of issue 2126.