Fix leaving hang, fix vanilla DunGen issue

Source/Patches/DunGenPatches.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+using System.Reflection.Emit;
+using DunGen;
+using HarmonyLib;
+using UnityEngine;
+using static HarmonyLib.AccessTools;
+
+namespace LCVR.Patches;
+
+/// <summary>
+/// This is a patch that fixes a problem in DunGen that should actually be done in a separate mod.
+///
+/// But it is affected debug builds in the VR mod and I am too lazy to make another separate mod to fix it.
+/// </summary>
+[LCVRPatch(LCVRPatchTarget.Universal)]
+[HarmonyPatch]
+internal static class DunGenPatches
+{
+    [HarmonyPatch(typeof(DungeonGenerator), nameof(DungeonGenerator.InnerGenerate), MethodType.Enumerator)]
+    [HarmonyTranspiler]
+    [HarmonyDebug]
+    private static IEnumerable<CodeInstruction> DunGenAllowInfiniteRetries(IEnumerable<CodeInstruction> instructions)
+    {
+        return new CodeMatcher(instructions)
+            .MatchForward(false,
+                new CodeMatch(OpCodes.Call, PropertyGetter(typeof(Application), nameof(Application.isEditor))))
+            .SetInstructionAndAdvance(new CodeInstruction(OpCodes.Ldc_I4_0))
+            .InstructionEnumeration();
+    }
+}

Source/Patches/GameNetworkManagerPatches.cs

@@ -27,6 +27,7 @@ private static void OnLeaveGame()
             return;
 
         foreach (var player in NetworkSystem.Instance.Players)
-            player.GetComponent<RigBuilder>().enabled = false;
+            if (player.TryGetComponent<RigBuilder>(out var rb))
+                rb.enabled = false;
     }
 }