Fix bug in Transformer.cs

Author: cheese3660

src/PatchManager.SassyPatching/Execution/Universe.cs

@@ -258,7 +258,7 @@ private void LoadSinglePatch(string modId, FileInfo patch, Transformer tokenTran
         }
         catch (Exception e)
         {
-            _errorLogger($"Could not run patch: {modId}:{patch.Name} due to: {e.Message}");
+            _errorLogger($"Could not run patch: {modId}:{patch.Name} due to: {e}");
         }
     }
 

src/PatchManager.SassyPatching/Transformer.cs

@@ -806,6 +806,12 @@ public override Node VisitImplicit_stage_def(sassy_parser.Implicit_stage_defCont
         context.GetCoordinate(), context.stage.GetStringValue(),
         context.stage_attribute().Select(Visit).Cast<StageDefinitionAttribute>().ToList());
 
+    public override Node VisitStage_value_before(sassy_parser.Stage_value_beforeContext context) =>
+        new StageDefinitionAttribute(context.GetCoordinate(), context.stage.GetStringValue(), false);
+
+    public override Node VisitStage_value_after(sassy_parser.Stage_value_afterContext context) => 
+        new StageDefinitionAttribute(context.GetCoordinate(), context.stage.GetStringValue(), true);
+
     /// <inheritdoc />
     public override Node VisitConfig_creation(sassy_parser.Config_creationContext context) => new ConfigCreation(
         context.GetCoordinate(), context.label.GetStringValue(), context.config_name.GetStringValue(),