lib: remove settled dependant signals when they are GCed

Author: geeksilva97

lib/internal/abort_controller.js

@@ -84,6 +84,13 @@ function lazyMessageChannel() {
 }
 
 const clearTimeoutRegistry = new SafeFinalizationRegistry(clearTimeout);
+const finalizers = new SafeFinalizationRegistry((signal) => {
+  signal[kDependantSignals].forEach(ref => {
+    if (!ref.deref()) {
+      signal[kDependantSignals].delete(ref);
+    }
+  });
+});
 const gcPersistentSignals = new SafeSet();
 
 const kAborted = Symbol('kAborted');
@@ -235,13 +242,17 @@ class AbortSignal extends EventTarget {
     }
     const resultSignalWeakRef = new SafeWeakRef(resultSignal);
     resultSignal[kSourceSignals] = new SafeSet();
+
+
     for (let i = 0; i < signalsArray.length; i++) {
       const signal = signalsArray[i];
+      finalizers.register(resultSignal, signal);
       if (signal.aborted) {
         abortSignal(resultSignal, signal.reason);
         return resultSignal;
       }
       signal[kDependantSignals] ??= new SafeSet();
+
       if (!signal[kComposite]) {
         resultSignal[kSourceSignals].add(new SafeWeakRef(signal));
         signal[kDependantSignals].add(resultSignalWeakRef);