This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 117b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025-08-11
1013. Uninitialized std::nullptr_t objectsSection: 7.3.2 [conv.lval] Status: CD3 Submitter: Miller Date: 2009-12-10[Moved to DR at the April, 2013 meeting.]
According to 7.3.2 [conv.lval] paragraph 1, an lvalue-to-rvalue conversion on an uninitialized object produces undefined behavior. Since there is only one “value” of type std::nullptr_t, an lvalue-to-rvalue conversion on a std::nullptr_t glvalue does not need to fetch the value from storage. Is there any need for undefined behavior in this case?
Proposed resolution (February, 2012):
This issue is resolved by the resolution of issue 616.
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