Construct interrupter first to fix exception safety issue.

asio/include/asio/detail/epoll_reactor.hpp

diff --git a/asio/include/asio/detail/epoll_reactor.hpp b/asio/include/asio/detail/epoll_reactor.hpp
index 96a312d..ee8721b 100644
--- a/asio/include/asio/detail/epoll_reactor.hpp
+++ b/asio/include/asio/detail/epoll_reactor.hpp
@@ -204,15 +204,15 @@
   // Mutex to protect access to internal data.
   mutex mutex_;
 
+  // The interrupter is used to break a blocking epoll_wait call.
+  select_interrupter interrupter_;
+
   // The epoll file descriptor.
   int epoll_fd_;
 
   // The timer file descriptor.
   int timer_fd_;
 
-  // The interrupter is used to break a blocking epoll_wait call.
-  select_interrupter interrupter_;
-
   // The timer queues.
   timer_queue_set timer_queues_;
 

asio/include/asio/detail/impl/epoll_reactor.ipp

diff --git a/asio/include/asio/detail/impl/epoll_reactor.ipp b/asio/include/asio/detail/impl/epoll_reactor.ipp
index ef36e31..2fda4a1 100644
--- a/asio/include/asio/detail/impl/epoll_reactor.ipp
+++ b/asio/include/asio/detail/impl/epoll_reactor.ipp
@@ -38,9 +38,9 @@
   : asio::detail::service_base<epoll_reactor>(io_service),
     io_service_(use_service<io_service_impl>(io_service)),
     mutex_(),
+    interrupter_(),
     epoll_fd_(do_epoll_create()),
     timer_fd_(do_timerfd_create()),
-    interrupter_(),
     shutdown_(false)
 {
   // Add the interrupter's descriptor to epoll.