anchor.diff:        ];
   
         final Process process =
  -          await Process.start(installation.executable, args);
  +          await _spawnChromiumProcess(installation.executable, args);
   
         remoteDebuggerCompleter.complete(
             getRemoteDebuggerUrl(Uri.parse('http://localhost:${kDevtoolsPort}')));
  
positive.code: 
  // @dart = 2.6
  import 'dart:async';
  import 'dart:io';
  
  import 'package:pedantic/pedantic.dart';
  
negative.code:   Chrome._(Future<Process> startBrowser(), this.remoteDebuggerUrl)
        : super(startBrowser);
  }
  
  /// Used by [Chrome] to detect a glibc bug and retry launching the
  /// browser.
  ///
  /// Once every few thousands of launches we hit this glibc bug:
  ///
  /// https://sourceware.org/bugzilla/show_bug.cgi?id=19329.
  ///
  /// When this happens Chrome spits out something like the following then exits with code 127:
  ///
  ///     Inconsistency detected by ld.so: ../elf/dl-tls.c: 493: _dl_allocate_tls_init: Assertion `listp->slotinfo[cnt].gen <= GL(dl_tls_generation)' failed!
  const String _kGlibcError = 'Inconsistency detected by ld.so';
  
  Future<Process> _spawnChromiumProcess(String executable, List<String> args, { String workingDirectory }) async {
    // Keep attempting to launch the browser until one of:
    // - Chrome launched successfully, in which case we just return from the loop.
    // - The tool detected an unretriable Chrome error, in which case we throw ToolExit.
    while (true) {
      final Process process = await Process.start(executable, args, workingDirectory: workingDirectory);
  
      process.stdout
        .transform(utf8.decoder)
        .transform(const LineSplitter())
        .listen((String line) {
          print('[CHROME STDOUT]: $line');
        });
  
      // Wait until the DevTools are listening before trying to connect. This is
      // only required for flutter_test --platform=chrome and not flutter run.
      bool hitGlibcBug = false;
      await process.stderr
        .transform(utf8.decoder)
        .transform(const LineSplitter())
        .map((String line) {
          print('[CHROME STDERR]:$line');
          if (line.contains(_kGlibcError)) {
            hitGlibcBug = true;
          }
          return line;
        })
        .firstWhere((String line) => line.startsWith('DevTools listening'), orElse: () {
          if (hitGlibcBug) {
            print(
              'Encountered glibc bug https://sourceware.org/bugzilla/show_bug.cgi?id=19329. '
              'Will try launching browser again.',
            );
            return null;
          }
          print('Failed to launch browser. Command used to launch it: ${args.join(' ')}');
          throw Exception(
            'Failed to launch browser. Make sure you are using an up-to-date '
            'Chrome or Edge. Otherwise, consider using -d web-server instead '
            'and filing an issue at https://github.com/flutter/flutter/issues.',
          );
        });
  
      if (!hitGlibcBug) {
        return process;
      }
  
      // A precaution that avoids accumulating browser processes, in case the
      // glibc bug doesn't cause the browser to quit and we keep looping and
      // launching more processes.
      process.exitCode.timeout(const Duration(seconds: 1), onTimeout: () {
        process.kill();
        return null;
      });
    }
  }
  