On Tue, 1 Jul 2014, Jonathan Wakely wrote:
Right, it looks as though that constructor has never been compiled or tested before, so GCC is not only making the code faster but also finding a bug :-)The most obvious fix is to add: template<class X> friend class IntrusiveRefCntPtr<X>; so that conversion from rvalues of different types is supported.
No <X> in the friend declaration though. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=12429 -- Marc Glisse
