diff --git a/src/runtime2/communication.rs b/src/runtime2/communication.rs
index 1f5cbaca826bf937a6facc7a952e517388a04e74..0d2fd6149906e06134d68780b528a22d5a1101b9 100644
--- a/src/runtime2/communication.rs
+++ b/src/runtime2/communication.rs
@@ -78,6 +78,7 @@ pub struct SyncMessage {
     pub content: SyncMessageContent,
 }
 
+#[derive(Debug)]
 pub struct SyncLocalSolutionEntry {
     pub self_port_id: PortId,
     pub peer_comp_id: CompId,
@@ -88,6 +89,7 @@ pub struct SyncLocalSolutionEntry {
 
 pub type SyncLocalSolution = Vec<SyncLocalSolutionEntry>;
 
+#[derive(Debug)]
 pub struct SyncSolutionPort {
     pub self_comp_id: CompId,
     pub self_port_id: PortId,
@@ -97,29 +99,37 @@ pub struct SyncSolutionPort {
     pub port_kind: PortKind,
 }
 
+#[derive(Debug)]
 pub struct SyncSolutionChannel {
     pub putter: Option<SyncSolutionPort>,
     pub getter: Option<SyncSolutionPort>,
 }
 
-#[derive(Copy, Clone)]
-pub enum RoundDecision {
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub enum SyncRoundDecision {
     None,
     Solution,
     Failure,
 }
 
-impl RoundDecision {
-    fn is_some(&self)
-}
-
+#[derive(Debug)]
 pub struct SyncPartialSolution {
     pub submissions_by: Vec<(CompId, bool)>,
     pub channel_mapping: Vec<SyncSolutionChannel>,
     pub decision: SyncRoundDecision,
 }
 
-#[derive(Debug, Clone)]
+impl Default for SyncPartialSolution {
+    fn default() -> Self {
+        return Self{
+            submissions_by: Vec::new(),
+            channel_mapping: Vec::new(),
+            decision: SyncRoundDecision::None,
+        }
+    }
+}
+
+#[derive(Debug)]
 pub enum SyncMessageContent {
     NotificationOfLeader,
     LocalSolution(CompId, SyncLocalSolution), // local solution of the specified component