examples & tests use context instead of coroutine.

example/http/client/coro-ssl/Jamfile

@@ -19,5 +19,5 @@ exe http-client-coro-ssl :
     :
     <variant>coverage:<build>no
     <variant>ubasan:<build>no
-    <library>/boost/coroutine//boost_coroutine
+    <library>/boost/context//boost_context
     ;

example/http/client/coro-ssl/http_client_coro_ssl.cpp

@@ -163,14 +163,25 @@ int main(int argc, char** argv)
 
     // Launch the asynchronous operation
     boost::asio::spawn(ioc, std::bind(
-        &do_session,
-        std::string(host),
-        std::string(port),
-        std::string(target),
-        version,
-        std::ref(ioc),
-        std::ref(ctx),
-        std::placeholders::_1));
+            &do_session,
+            std::string(host),
+            std::string(port),
+            std::string(target),
+            version,
+            std::ref(ioc),
+            std::ref(ctx),
+            std::placeholders::_1),
+        // on completion, spawn will call this function
+        [](std::exception_ptr ex)
+        {
+            // if an exception occurred in the coroutine,
+            // it's something critical, e.g. out of memory
+            // we capture normal errors in the ec
+            // so we just rethrow the exception here,
+            // which will cause `ioc.run()` to throw
+            if (ex)
+                std::rethrow_exception(ex);
+        });
 
     // Run the I/O service. The call will return when
     // the get operation is complete.

example/http/client/coro/Jamfile

@@ -12,5 +12,5 @@ exe http-client-coro :
     :
     <variant>coverage:<build>no
     <variant>ubasan:<build>no
-    <library>/boost/coroutine//boost_coroutine
+    <library>/boost/context//boost_context
     ;

example/http/client/coro/http_client_coro.cpp

@@ -134,7 +134,18 @@ int main(int argc, char** argv)
         std::string(target),
         version,
         std::ref(ioc),
-        std::placeholders::_1));
+        std::placeholders::_1),
+            // on completion, spawn will call this function
+           [](std::exception_ptr ex)
+           {
+               // if an exception occurred in the coroutine,
+               // it's something critical, e.g. out of memory
+               // we capture normal errors in the ec
+               // so we just rethrow the exception here,
+               // which will cause `ioc.run()` to throw
+               if (ex)
+                   std::rethrow_exception(ex);
+           });
 
     // Run the I/O service. The call will return when
     // the get operation is complete.