Improve error messaging

Penumbra/Import/Models/ModelManager.cs

@@ -37,7 +37,12 @@ public sealed class ModelManager(IFramework framework, ActiveCollections collect
     public Task<MdlFile?> ImportGltf(string inputPath)
     {
         var action = new ImportGltfAction(inputPath);
-        return Enqueue(action).ContinueWith(_ => action.Out);
+        return Enqueue(action).ContinueWith(task => 
+        {
+            if (task.IsFaulted && task.Exception != null)
+                throw task.Exception;
+            return action.Out;
+        });
     }
     /// <summary> Try to find the .sklb paths for a .mdl file. </summary>
     /// <param name="mdlPath"> .mdl file to look up the skeletons for. </param>

Penumbra/UI/AdvancedWindow/ModEditWindow.Models.MdlTab.cs

@@ -18,9 +18,9 @@ public partial class ModEditWindow
         public List<Utf8GamePath>? GamePaths { get; private set; }
         public int                 GamePathIndex;
 
-        private bool    _dirty;
+        private bool            _dirty;
-        public  bool    PendingIo   { get; private set; }
+        public  bool            PendingIo    { get; private set; }
-        public  string? IoException { get; private set; }
+        public  List<Exception> IoExceptions { get; private set; } = [];
 
         public MdlTab(ModEditWindow edit, byte[] bytes, string path)
         {
@@ -85,7 +85,7 @@ public partial class ModEditWindow
 
             task.ContinueWith(t =>
             {
-                IoException = t.Exception?.ToString();
+                RecordIoExceptions(t.Exception);
                 GamePaths   = t.Result;
                 PendingIo   = false;
             });
@@ -120,7 +120,7 @@ public partial class ModEditWindow
             }
             catch (Exception exception)
             {
-                IoException = exception.ToString();
+                RecordIoExceptions(exception);
                 return;
             }
 
@@ -128,7 +128,7 @@ public partial class ModEditWindow
             _edit._models.ExportToGltf(Mdl, skeletons, outputPath)
                 .ContinueWith(task =>
                 {
-                    IoException = task.Exception?.ToString();
+                    RecordIoExceptions(task.Exception);
                     PendingIo   = false;
                 });
         }
@@ -141,7 +141,7 @@ public partial class ModEditWindow
             _edit._models.ImportGltf(inputPath)
                 .ContinueWith(task =>
                 {
-                    IoException = task.Exception?.ToString();
+                    RecordIoExceptions(task.Exception);
                     if (task is { IsCompletedSuccessfully: true, Result: not null })
                     {
                         Initialize(task.Result);
@@ -151,6 +151,15 @@ public partial class ModEditWindow
                 });
         }
 
+        private void RecordIoExceptions(Exception? exception)
+        {
+            IoExceptions = exception switch {
+                null                  => [],
+                AggregateException ae => ae.Flatten().InnerExceptions.ToList(),
+                Exception other       => [other],
+            };
+        }
+
         /// <summary> Read a .sklb from the active collection or game. </summary>
         /// <param name="sklbPath"> Game path to the .sklb to load. </param>
         private SklbFile ReadSklb(string sklbPath)

Penumbra/UI/AdvancedWindow/ModEditWindow.Models.cs

@@ -7,6 +7,7 @@ using Penumbra.GameData;
 using Penumbra.GameData.Files;
 using Penumbra.Import.Models;
 using Penumbra.String.Classes;
+using Penumbra.UI.Classes;
 
 namespace Penumbra.UI.AdvancedWindow;
 
@@ -61,8 +62,7 @@ public partial class ModEditWindow
         ImGui.SameLine();
         DrawExport(tab, childSize, disabled);
 
-        if (tab.IoException != null)
+        DrawIoExceptions(tab);
-            ImGuiUtil.TextWrapped(tab.IoException);
     }
 
     private void DrawImport(MdlTab tab, Vector2 size, bool _1)
@@ -99,10 +99,10 @@ public partial class ModEditWindow
 
         if (tab.GamePaths == null)
         {
-            if (tab.IoException == null)
+            if (tab.IoExceptions.Count == 0)
                 ImGui.TextUnformatted("Resolving model game paths.");
             else
-                ImGuiUtil.TextWrapped(tab.IoException);
+                ImGui.TextUnformatted("Failed to resolve model game paths.");
 
             return;
         }
@@ -126,6 +126,30 @@ public partial class ModEditWindow
                 false
             );
     }
+    
+    private void DrawIoExceptions(MdlTab tab)
+    {
+        if (tab.IoExceptions.Count == 0)
+            return;
+
+        var size = new Vector2(ImGui.GetContentRegionAvail().X, 0);
+        using var frame = ImRaii.FramedGroup("Exceptions", size, headerPreIcon: FontAwesomeIcon.TimesCircle, borderColor: Colors.RegexWarningBorder);
+
+        var spaceAvail = ImGui.GetContentRegionAvail().X - ImGui.GetStyle().ItemSpacing.X - 100;
+        foreach (var exception in tab.IoExceptions)
+        {
+            var message = $"{exception.GetType().Name}: {exception.Message} {exception.Message}";
+            var textSize = ImGui.CalcTextSize(message).X;
+            if (textSize > spaceAvail)
+                message = message.Substring(0, (int)Math.Floor(message.Length * (spaceAvail / textSize))) + "...";
+
+            using (var exceptionNode = ImRaii.TreeNode(message))
+            {
+                if (exceptionNode)
+                    ImGuiUtil.TextWrapped(exception.ToString());
+            }
+        }
+    }
 
     private void DrawGamePathCombo(MdlTab tab)
     {