[flutter_tools] Fix Future error handling ArgumentError in doctor --android-licenses (#119977)

* wip

* write test

* make error handling printError

* remove diff

packages/flutter_tools/lib/src/android/android_workflow.dart

@@ -436,11 +436,14 @@ class AndroidLicenseValidator extends DoctorValidator {
       unawaited(process.stdin.addStream(_stdio.stdin)
         // If the process exits unexpectedly with an error, that will be
         // handled by the caller.
-        .catchError((dynamic err, StackTrace stack) {
-          _logger.printTrace('Echoing stdin to the licenses subprocess failed:');
-          _logger.printTrace('$err\n$stack');
-        }
-      ));
+        .then(
+          (Object? socket) => socket,
+          onError: (dynamic err, StackTrace stack) {
+            _logger.printError('Echoing stdin to the licenses subprocess failed:');
+            _logger.printError('$err\n$stack');
+          },
+        ),
+      );
 
       // Wait for stdout and stderr to be fully processed, because process.exitCode
       // may complete first.
@@ -450,8 +453,8 @@ class AndroidLicenseValidator extends DoctorValidator {
           _stdio.addStderrStream(process.stderr),
         ]);
       } on Exception catch (err, stack) {
-        _logger.printTrace('Echoing stdout or stderr from the license subprocess failed:');
-        _logger.printTrace('$err\n$stack');
+        _logger.printError('Echoing stdout or stderr from the license subprocess failed:');
+        _logger.printError('$err\n$stack');
       }
 
       final int exitCode = await process.exitCode;

packages/flutter_tools/test/general.shard/android/android_workflow_test.dart

@@ -7,6 +7,7 @@ import 'package:flutter_tools/src/android/android_sdk.dart';
 import 'package:flutter_tools/src/android/android_studio.dart';
 import 'package:flutter_tools/src/android/android_workflow.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
+import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/base/user_messages.dart';
@@ -311,6 +312,37 @@ Review licenses that have not been accepted (y/N)?
     expect(licenseValidator.runLicenseManager(), throwsToolExit());
   });
 
+  testWithoutContext('runLicenseManager handles broken pipe without ArgumentError', () async {
+    sdk.sdkManagerPath = '/foo/bar/sdkmanager';
+    const String exceptionMessage = 'Write failed (OS Error: Broken pipe, errno = 32), port = 0';
+    const SocketException exception = SocketException(exceptionMessage);
+    // By using a `Socket` generic parameter, the stdin.addStream will return a `Future<Socket>`
+    // We are testing that our error handling properly handles futures of this type
+    final ThrowingStdin<Socket> fakeStdin = ThrowingStdin<Socket>(exception);
+    final FakeCommand licenseCommand = FakeCommand(
+      command: <String>[sdk.sdkManagerPath!, '--licenses'],
+      stdin: fakeStdin,
+    );
+    processManager.addCommand(licenseCommand);
+    final BufferLogger logger = BufferLogger.test();
+
+    final AndroidLicenseValidator licenseValidator = AndroidLicenseValidator(
+      androidSdk: sdk,
+      fileSystem: fileSystem,
+      processManager: processManager,
+      platform: FakePlatform(environment: <String, String>{'HOME': '/home/me'}),
+      stdio: stdio,
+      logger: logger,
+      userMessages: UserMessages(),
+      androidStudio: FakeAndroidStudio(),
+      operatingSystemUtils: FakeOperatingSystemUtils(),
+    );
+
+    await licenseValidator.runLicenseManager();
+    expect(logger.errorText, contains(exceptionMessage));
+    expect(processManager, hasNoRemainingExpectations);
+  });
+
   testWithoutContext('runLicenseManager errors when sdkmanager fails to run', () async {
     sdk.sdkManagerPath = '/foo/bar/sdkmanager';
     processManager.excludedExecutables.add('/foo/bar/sdkmanager');
@@ -574,3 +606,14 @@ class FakeAndroidStudio extends Fake implements AndroidStudio {
   @override
   String get javaPath => 'java';
 }
+
+class ThrowingStdin<T> extends Fake implements IOSink {
+  ThrowingStdin(this.exception);
+
+  final Exception exception;
+
+  @override
+  Future<dynamic> addStream(Stream<List<int>> stream) {
+    return Future<T>.error(exception);
+  }
+}