future<>::then(void()) doesn't works

[viboes]

The following patch must be applied

Index: future.hpp
===================================================================
--- future.hpp	(revision 84678)
+++ future.hpp	(working copy)
@@ -3467,7 +3467,7 @@
       Fp continuation;
 
     public:
-      explicit future_async_continuation_shared_state(
+      future_async_continuation_shared_state(
           F& f, BOOST_THREAD_FWD_REF(Fp) c
           ) :
       parent(f.future_),
@@ -3503,14 +3503,14 @@
     template<typename F, typename Fp>
     struct future_async_continuation_shared_state<F, void, Fp>: public future_async_shared_state_base<void>
     {
-      F& parent;
+      F parent;
       Fp continuation;
 
     public:
-      explicit future_async_continuation_shared_state(
+      future_async_continuation_shared_state(
           F& f, BOOST_THREAD_FWD_REF(Fp) c
           ) :
-      parent(f),
+            parent(f.future_),
       //continuation(boost::forward<Fp>(c)
       continuation(boost::move(c))
       {
@@ -3549,14 +3549,14 @@
     template<typename F, typename Rp, typename Fp>
     struct future_deferred_continuation_shared_state: shared_state<Rp>
     {
-      F& parent;
+      F parent;
       Fp continuation;
 
     public:
-      explicit future_deferred_continuation_shared_state(
+      future_deferred_continuation_shared_state(
           F& f, BOOST_THREAD_FWD_REF(Fp) c
           ) :
-          parent(f),
+          parent(f.future_),
           //continuation(boost::forward<Fp>(c)
           continuation(c)
       {
@@ -3583,14 +3583,14 @@
     template<typename F, typename Fp>
     struct future_deferred_continuation_shared_state<F,void,Fp>: shared_state<void>
     {
-      F& parent;
+      F parent;
       Fp continuation;
 
     public:
-      explicit future_deferred_continuation_shared_state(
+      future_deferred_continuation_shared_state(
           F& f, BOOST_THREAD_FWD_REF(Fp) c
           ):
-          parent(f),
+          parent(f.future_),
           continuation(boost::move(c))
       {
         this->set_deferred();

[viboes]

(In [84717]) Thread: fix #8550, #8671, #8672.