Add more diagnostic output to tests

Author: davidanthoff

test/test_typed.jl

@@ -16,7 +16,7 @@
 
     server_is_up = Base.Condition()
 
-    server_task = @async begin
+    server_task = @async try
         server = listen(global_socket_name)
         notify(server_is_up)
         sock = accept(server)
@@ -35,6 +35,8 @@
         for msg in conn
             JSONRPC.dispatch_msg(conn, msg_dispatcher, msg)
         end
+    catch err
+        Base.display_error(stderr, err, catch_backtrace())
     end
 
     wait(server_is_up)
@@ -63,7 +65,7 @@
 
     server_is_up = Base.Condition()
 
-    server_task2 = @async begin
+    server_task2 = @async try
         server = listen(global_socket_name)
         notify(server_is_up)
         sock = accept(server)
@@ -77,6 +79,8 @@
         for msg in conn
             @test_throws ErrorException("The handler for the 'request2' request returned a value of type $Int, which is not a valid return type according to the request definition.") JSONRPC.dispatch_msg(conn, msg_dispatcher, msg)
         end
+    catch err
+        Base.display_error(stderr, err, catch_backtrace())
     end
 
     wait(server_is_up)