events: propagate abortsignal reason in new AbortError ctor in events

Signed-off-by: James M Snell <[email protected]>

PR-URL: #41008
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Robert Nagy <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>

Author: jasnell

lib/events.js

@@ -810,7 +810,7 @@ async function once(emitter, name, options = {}) {
   const signal = options?.signal;
   validateAbortSignal(signal, 'options.signal');
   if (signal?.aborted)
-    throw new AbortError();
+    throw new AbortError(undefined, { cause: signal?.reason });
   return new Promise((resolve, reject) => {
     const errorListener = (err) => {
       emitter.removeListener(name, resolver);
@@ -835,7 +835,7 @@ async function once(emitter, name, options = {}) {
     function abortListener() {
       eventTargetAgnosticRemoveListener(emitter, name, resolver);
       eventTargetAgnosticRemoveListener(emitter, 'error', errorListener);
-      reject(new AbortError());
+      reject(new AbortError(undefined, { cause: signal?.reason }));
     }
     if (signal != null) {
       eventTargetAgnosticAddListener(
@@ -888,7 +888,7 @@ function on(emitter, event, options) {
   const signal = options?.signal;
   validateAbortSignal(signal, 'options.signal');
   if (signal?.aborted)
-    throw new AbortError();
+    throw new AbortError(undefined, { cause: signal?.reason });
 
   const unconsumedEvents = [];
   const unconsumedPromises = [];
@@ -976,7 +976,7 @@ function on(emitter, event, options) {
   return iterator;
 
   function abortListener() {
-    errorHandler(new AbortError());
+    errorHandler(new AbortError(undefined, { cause: signal?.reason }));
   }
 
   function eventHandler(...args) {