[flutter_tools] wrap http send in async guard (#69972)

packages/flutter_tools/lib/src/reporting/crash_reporting.dart

@@ -175,16 +175,19 @@ class CrashReportSender {
         filename: _kStackTraceFilename,
       ));
 
-      final http.StreamedResponse resp = await _client.send(req);
-
-      if (resp.statusCode == 200) {
-        final String reportId = await http.ByteStream(resp.stream)
-          .bytesToString();
-        _logger.printTrace('Crash report sent (report ID: $reportId)');
-        _crashReportSent = true;
-      } else {
-        _logger.printError('Failed to send crash report. Server responded with HTTP status code ${resp.statusCode}');
-      }
+      // package:http may throw unhandled async exceptions into the Zone.
+      await asyncGuard(() async {
+        final http.StreamedResponse resp = await _client.send(req);
+
+        if (resp.statusCode == HttpStatus.ok) {
+          final String reportId = await http.ByteStream(resp.stream)
+            .bytesToString();
+          _logger.printTrace('Crash report sent (report ID: $reportId)');
+          _crashReportSent = true;
+        } else {
+          _logger.printError('Failed to send crash report. Server responded with HTTP status code ${resp.statusCode}');
+        }
+      });
     // Catch all exceptions to print the message that makes clear that the
     // crash logger crashed.
     } catch (sendError, sendStackTrace) { // ignore: avoid_catches_without_on_clauses

packages/flutter_tools/lib/src/reporting/reporting.dart

@@ -12,6 +12,7 @@ import 'package:intl/intl.dart';
 import 'package:meta/meta.dart';
 import 'package:usage/usage_io.dart';
 
+import '../base/async_guard.dart';
 import '../base/error_handling_io.dart';
 import '../base/file_system.dart';
 import '../base/io.dart';