Add system property to dump stack on bad plugin class access (#8417)

patches/api/0398-Add-system-property-to-print-stacktrace-on-bad-plugi.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nassim Jahnke <nassim@njahnke.dev>
+Date: Sat, 1 Oct 2022 09:44:26 +0200
+Subject: [PATCH] Add system property to print stacktrace on bad plugin class
+ access
+
+
+diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
+index f7cfe6c0d9d52ed72d0d45baaaf856c15769c668..06daf7e7b9f177256a7a15b91e72ff53f89ccb68 100644
+--- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
++++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
+@@ -162,6 +162,11 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
+                             // In case the bad access occurs on construction
+                             loader.server.getLogger().log(Level.WARNING, "[{0}] Loaded class {1} from {2} which is not a depend or softdepend of this plugin.", new Object[]{description.getName(), name, provider.getFullName()});
+                         }
++                        // Paper start
++                        if (Boolean.getBoolean("Paper.printStacktraceOnBadPluginClassAccess")) {
++                            new Exception().printStackTrace();
++                        }
++                        // Paper end
+                     }
+                 }
+