diff --git a/src/java/me/topchetoeu/jscript/runtime/debug/DebugContext.java b/src/java/me/topchetoeu/jscript/runtime/debug/DebugContext.java
index 2b38b84..c87a3b4 100644
--- a/src/java/me/topchetoeu/jscript/runtime/debug/DebugContext.java
+++ b/src/java/me/topchetoeu/jscript/runtime/debug/DebugContext.java
@@ -36,6 +36,10 @@ public class DebugContext {
         this.debugger = debugger;
         return true;
     }
+    public boolean detachDebugger(DebugHandler debugger) {
+        if (this.debugger != debugger) return false;
+        return detachDebugger();
+    }
     public boolean detachDebugger() {
         this.debugger = null;
         return true;
diff --git a/src/java/me/topchetoeu/jscript/utils/debug/SimpleDebugger.java b/src/java/me/topchetoeu/jscript/utils/debug/SimpleDebugger.java
index 8f52225..6989ad1 100644
--- a/src/java/me/topchetoeu/jscript/utils/debug/SimpleDebugger.java
+++ b/src/java/me/topchetoeu/jscript/utils/debug/SimpleDebugger.java
@@ -205,6 +205,7 @@ public class SimpleDebugger implements Debugger {
 
     private ObjectValue emptyObject = new ObjectValue();
 
+    private WeakHashMap<DebugContext, DebugContext> contexts = new WeakHashMap<>();
     private WeakHashMap<FunctionBody, FunctionMap> mappings = new WeakHashMap<>();
     private WeakHashMap<FunctionBody, HashMap<Location, Breakpoint>> bpLocs = new WeakHashMap<>();
 
@@ -642,11 +643,10 @@ public class SimpleDebugger implements Debugger {
         execptionType = CatchType.NONE;
         state = State.RESUMED;
 
-        // idToBptCand.clear();
+        mappings.clear();
+        bpLocs.clear();
 
         idToBreakpoint.clear();
-        // locToBreakpoint.clear();
-        // tmpBreakpts.clear();
 
         filenameToId.clear();
         idToSource.clear();
@@ -664,6 +664,9 @@ public class SimpleDebugger implements Debugger {
         stepOutFrame = currFrame = null;
         stepOutPtr = 0;
 
+        for (var ctx : contexts.keySet()) ctx.detachDebugger(this);
+        contexts.clear();
+
         updateNotifier.next();
     }
 
@@ -1041,6 +1044,7 @@ public class SimpleDebugger implements Debugger {
 
     public SimpleDebugger attach(DebugContext ctx) {
         ctx.attachDebugger(this);
+        contexts.put(ctx, ctx);
         return this;
     }