This Stackoverflow question http://stackoverflow.com/questions/33161003/using-a-temporary-array-as-an-lvalue provides the following code:

using Y = int[10];

int main() {
    (Y { })[0] = 1;
}

which compiles without diagnostic, if I am reading CWG defect report 1213 correctly http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1213 then the result of the  subscript operator should be an xvalue and therefore not assignable to. Is this a correct interpretation?

The clang defect report status page does list the status of DR 1213 as unknown http://clang.llvm.org/cxx_dr_status.html but since this has come up on a couple of SO questions already I thought it was worth it to file a bug report.

I have a Wandbox example here http://melpon.org/wandbox/permlink/tiLfQnvsvBsAtNZv