Fixed LabAPI hanging the entire server startup due to a plugin having a null RequiredApiVersion property

Author: marchellcx

LabExtended/Core/ApiLoader.cs

@@ -322,6 +322,7 @@ private static void InvokeApi(bool isPreload)
     {
         if (isPreload)
         {
+            LabApiNullPluginVersionFix.Internal_Init();
             SwitchContainer.Internal_Init();
             LogPatch.Internal_Init();
         }

LabExtended/Patches/Fixes/LabApiNullPluginVersionFix.cs

@@ -0,0 +1,53 @@
+using HarmonyLib;
+
+using LabApi.Loader;
+using LabApi.Loader.Features.Plugins;
+
+using LabExtended.Core;
+using LabExtended.Extensions;
+
+using System.Reflection;
+
+namespace LabExtended.Patches.Fixes
+{
+    /// <summary>
+    /// Fixes the server hanging on startup when a plugin with a null RequiredApiVersion is present.
+    /// </summary>
+    public static class LabApiNullPluginVersionFix
+    {
+        private static MethodInfo targetMethod = typeof(PluginLoader).FindMethod(nameof(PluginLoader.ValidateVersion));
+        private static MethodInfo patchMethod = typeof(LabApiNullPluginVersionFix).FindMethod(nameof(Prefix));
+
+        private static bool Prefix(Plugin plugin, ref bool __result)
+        {
+            if (plugin.RequiredApiVersion is null
+                || plugin.Properties is null)
+            {
+                __result = true;
+                return false;
+            }
+
+            return false;
+        }
+
+        internal static void Internal_Init()
+        {
+            try
+            {
+                if (ApiPatcher.Harmony.Patch(targetMethod, new HarmonyMethod(patchMethod)) != null)
+                {
+                    ApiPatcher.labExPatchCountOffset++;
+                    ApiLog.Debug("LabExtended", $"Applied &6{nameof(LabApiNullPluginVersionFix)}&r");
+                }
+                else
+                {
+                    ApiLog.Error("LabExtended", $"Failed to apply &3{nameof(LabApiNullPluginVersionFix)}&r!");
+                }
+            }
+            catch (Exception ex)
+            {
+                ApiLog.Error("LabExtended", ex);
+            }
+        }
+    }
+}