fix(up): solution serialization sometime failed in the presence of no…

…n-symbolic parameters

planning/grpc/server/src/serialize.rs

@@ -50,12 +50,14 @@ pub fn serialize_plan(
         let end = serialize_time(ch.chronicle.end, assignment)?;
 
         // extract name and parameters (possibly empty if not an action or method chronicle)
-        let name = if let Some(name) = ch.chronicle.name.first() {
-            let name = SAtom::try_from(*name).context("Action name is not a symbol")?;
-            let name = assignment.sym_value_of(name).context("Unbound sym var")?;
-            problem.model.shape.symbols.symbol(name).to_string()
-        } else {
-            "".to_string()
+        let name = match ch.chronicle.kind {
+            ChronicleKind::Problem => "problem".to_string(),
+            ChronicleKind::Method | ChronicleKind::Action | ChronicleKind::DurativeAction => {
+                let name = ch.chronicle.name.first().context("No name for action")?;
+                let name = SAtom::try_from(*name).context("Action name is not a symbol")?;
+                let name = assignment.sym_value_of(name).context("Unbound sym var")?;
+                problem.model.shape.symbols.symbol(name).to_string()
+            }
         };
 
         let parameters = if ch.chronicle.name.len() > 1 {