fix: supress init errors if the target is closed

With #8520 Puppeteer is now aware of all targets it connects
to. In order to have a not flaky init, Puppeteer waits for
all existing targets to be configured during the connection process.
This does not work well in case of concurrent connections because
while one connection might initializing a target the other one
might be closed it. In general, that is expected because we
can only be eventually consistent about the target state but we
also should not crash the init if some targets have been closed.
This PR implements checks to see if the errors are caused by the
target or session closures and supresses them if it's the case.

src/common/BrowserConnector.ts

@@ -131,7 +131,6 @@ export async function _connectToBrowser(
     targetFilter,
     isPageTarget
   );
-  await browser.pages();
   return browser;
 }
 

src/common/Connection.ts

@@ -445,3 +445,13 @@ function rewriteError(
   error.originalMessage = originalMessage ?? error.originalMessage;
   return error;
 }
+
+/**
+ * @internal
+ */
+export function isTargetClosedError(err: Error): boolean {
+  return (
+    err.message.includes('Target closed') ||
+    err.message.includes('Session closed')
+  );
+}

src/common/FrameManager.ts

@@ -19,7 +19,7 @@ import {assert} from '../util/assert.js';
 import {createDebuggableDeferredPromise} from '../util/DebuggableDeferredPromise.js';
 import {DeferredPromise} from '../util/DeferredPromise.js';
 import {isErrorLike} from '../util/ErrorLike.js';
-import {CDPSession} from './Connection.js';
+import {CDPSession, isTargetClosedError} from './Connection.js';
 import {EventEmitter} from './EventEmitter.js';
 import {EVALUATION_SCRIPT_URL, ExecutionContext} from './ExecutionContext.js';
 import {Frame} from './Frame.js';
@@ -172,11 +172,7 @@ export class FrameManager extends EventEmitter {
       ]);
     } catch (error) {
       // The target might have been closed before the initialization finished.
-      if (
-        isErrorLike(error) &&
-        (error.message.includes('Target closed') ||
-          error.message.includes('Session closed'))
-      ) {
+      if (isErrorLike(error) && isTargetClosedError(error)) {
         return;
       }
 

src/common/Page.ts

@@ -24,7 +24,11 @@ import {
 import {isErrorLike} from '../util/ErrorLike.js';
 import {Accessibility} from './Accessibility.js';
 import {Browser, BrowserContext} from './Browser.js';
-import {CDPSession, CDPSessionEmittedEvents} from './Connection.js';
+import {
+  CDPSession,
+  CDPSessionEmittedEvents,
+  isTargetClosedError,
+} from './Connection.js';
 import {ConsoleMessage, ConsoleMessageType} from './ConsoleMessage.js';
 import {Coverage} from './Coverage.js';
 import {Dialog} from './Dialog.js';
@@ -402,6 +406,20 @@ export interface PageEventObject {
   workerdestroyed: WebWorker;
 }
 
+/**
+ * Supresses the error if it's caused by the target being closed. It usually happens
+ * if there are concurrent Puppeteer connections to the target and the target is closed by
+ * the concurrent connection.
+ * @internal
+ */
+function debugErrorIfTargetClosed(err: Error): void {
+  if (isTargetClosedError(err)) {
+    debugError(err);
+    return;
+  }
+  throw err;
+}
+
 /**
  * Page provides methods to interact with a single tab or
  * {@link https://developer.chrome.com/extensions/background_pages | extension background page}
@@ -470,7 +488,7 @@ export class Page extends EventEmitter {
     );
     await page.#initialize();
     if (defaultViewport) {
-      await page.setViewport(defaultViewport);
+      await page.setViewport(defaultViewport).catch(debugErrorIfTargetClosed);
     }
     return page;
   }
@@ -649,7 +667,7 @@ export class Page extends EventEmitter {
       this.#frameManager.initialize(this.#target._targetId),
       this.#client.send('Performance.enable'),
       this.#client.send('Log.enable'),
-    ]);
+    ]).catch(debugErrorIfTargetClosed);
   }
 
   async #onFileChooser(