http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59768
--- Comment #1 from Casey Carter <Casey at Carter dot net> --- This behavior would appear to NOT be erroneous. I was operating under the assumption that the behavior of the std::thread constructor and std::bind were identical by design given that both use the "INVOKE" machinery defined by the standard in [func.require]/1. However, the replacement of reference_wrapper<A> with its stored reference is specified only for std::bind in [func.bind.bind]/10: The values of the bound arguments v1, v2, ..., vN and their corresponding types V1, V2, ..., VN depend on the types TiD derived from the call to bind and the cv-qualifiers cv of the call wrapper g as follows: — if TiD is reference_wrapper<T>, the argument is tid.get() and its type Vi is T&; This would then not be a regression in the 4.8 line, but a correction to a long-standing bug. I apologize for wasting your time with an erroneous bug report.
