Revert "Exit resident web runner on initial compilation failure (#41441)" (#41498)

packages/flutter_tools/lib/src/build_runner/resident_web_runner.dart

@@ -192,7 +192,9 @@ class ResidentWebRunner extends ResidentRunner {
         _connectionResult = await _webFs.connect(debuggingOptions);
         unawaited(_connectionResult.debugConnection.onDone.whenComplete(exit));
       }
-    } catch (err) {
+    } catch (err, stackTrace) {
+      printError(err.toString());
+      printError(stackTrace.toString());
       throwToolExit('Failed to build application for the web.');
     } finally {
       buildStatus.stop();

packages/flutter_tools/lib/src/build_runner/web_fs.dart

@@ -135,7 +135,7 @@ class WebFs {
     _client.startBuild();
     await for (BuildResults results in _client.buildResults) {
       final BuildResult result = results.results.firstWhere((BuildResult result) {
-        return result.target == kBuildTargetName;
+        return result.target == 'web';
       });
       if (result.status == BuildStatus.failed) {
         return false;
@@ -164,7 +164,6 @@ class WebFs {
     final bool hasWebPlugins = findPlugins(flutterProject)
         .any((Plugin p) => p.platforms.containsKey(WebPlugin.kConfigKey));
     // Start the build daemon and run an initial build.
-    final Completer<bool> inititalBuild = Completer<bool>();
     final BuildDaemonClient client = await buildDaemonCreator
       .startBuildDaemon(fs.currentDirectory.path,
           release: buildInfo.isRelease,
@@ -179,17 +178,6 @@ class WebFs {
           return results.results
             .firstWhere((BuildResult result) => result.target == kBuildTargetName);
         });
-    client.buildResults.listen((BuildResults buildResults) {
-      final BuildResult result = buildResults.results.firstWhere((BuildResult result) {
-        return result.target == kBuildTargetName;
-      });
-      if (result.status == BuildStatus.failed) {
-        inititalBuild.complete(false);
-      }
-      if (result.status == BuildStatus.succeeded) {
-        inititalBuild.complete(true);
-      }
-    });
     final int daemonAssetPort = buildDaemonCreator.assetServerPort(fs.currentDirectory);
 
     // Initialize the asset bundle.
@@ -261,17 +249,13 @@ class WebFs {
     cascade = cascade.add(assetServer.handle);
     final HttpServer server = await httpMultiServerFactory(hostname ?? _kHostName, hostPort);
     shelf_io.serveRequests(server, cascade.handler);
-    final WebFs webFS = WebFs(
+    return WebFs(
       client,
       server,
       dwds,
       'http://$_kHostName:$hostPort/',
       assetServer,
     );
-    if (!await inititalBuild.future) {
-      throw Exception('Failed to compile for the web.');
-    }
-    return webFS;
   }
 }
 

packages/flutter_tools/test/general.shard/web/web_fs_test.dart

@@ -4,7 +4,6 @@
 
 import 'package:build_daemon/client.dart';
 import 'package:build_daemon/data/build_status.dart';
-import 'package:built_collection/built_collection.dart';
 import 'package:dwds/dwds.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/os.dart';
@@ -50,18 +49,7 @@ void main() {
       return 1234;
     });
     when(mockBuildDaemonClient.buildResults).thenAnswer((Invocation _) {
-      return Stream<BuildResults>.fromFuture(Future<BuildResults>.value(
-        BuildResults((BuildResultsBuilder builder) {
-          builder.results = ListBuilder<BuildResult>(
-            <BuildResult>[
-              DefaultBuildResult((DefaultBuildResultBuilder builder) {
-                builder.target = 'web';
-                builder.status = BuildStatus.succeeded;
-              })
-            ]
-          );
-        })
-      ));
+      return const Stream<BuildResults>.empty();
     });
     when(mockBuildDaemonCreator.assetServerPort(any)).thenReturn(4321);
     testbed = Testbed(
@@ -153,34 +141,6 @@ void main() {
     expect(lastPort, 1234);
     expect(lastAddress, contains('foo'));
   }));
-
-  test('Throws exception if build fails', () => testbed.run(() async {
-    when(mockBuildDaemonClient.buildResults).thenAnswer((Invocation _) {
-      return Stream<BuildResults>.fromFuture(Future<BuildResults>.value(
-        BuildResults((BuildResultsBuilder builder) {
-          builder.results = ListBuilder<BuildResult>(
-            <BuildResult>[
-              DefaultBuildResult((DefaultBuildResultBuilder builder) {
-                builder.target = 'web';
-                builder.status = BuildStatus.failed;
-              })
-            ]
-          );
-        })
-      ));
-    });
-    final FlutterProject flutterProject = FlutterProject.current();
-
-    expect(WebFs.start(
-      skipDwds: false,
-      target: fs.path.join('lib', 'main.dart'),
-      buildInfo: BuildInfo.debug,
-      flutterProject: flutterProject,
-      initializePlatform: false,
-      hostname: 'foo',
-      port: '1234',
-    ), throwsA(isInstanceOf<Exception>()));
-  }));
 }
 
 class MockBuildDaemonCreator extends Mock implements BuildDaemonCreator {}