Proposed Resolution (November, 2006):

Add the indicated wording to 7.6.20 [expr.comma] paragraph 1:

... The type and value of the result are the type and value of the right operand; the result is of the same value category as its right operand, and is a bit-field if its right operand is a glvalue and a bit-field. If the value of the right operand is a temporary (6.7.7 [class.temporary]), the result is that temporary.