[flutter_tool] Teach crash reporter about HttpException (#39005)

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

@@ -127,7 +127,7 @@ class CrashReportSender {
         printError('Failed to send crash report. Server responded with HTTP status code ${resp.statusCode}');
       }
     } catch (sendError, sendStackTrace) {
-      if (sendError is SocketException) {
+      if (sendError is SocketException || sendError is HttpException) {
         printError('Failed to send crash report due to a network error: $sendError');
       } else {
         // If the sender itself crashes, just print. We did our best.

packages/flutter_tools/test/general.shard/crash_reporting_test.dart

@@ -59,6 +59,48 @@ void main() {
       Stdio: () => const _NoStderr(),
     });
 
+    testUsingContext('should print an explanatory message when there is a SocketException', () async {
+      final Completer<int> exitCodeCompleter = Completer<int>();
+      setExitFunctionForTests((int exitCode) {
+        exitCodeCompleter.complete(exitCode);
+      });
+
+      CrashReportSender.initializeWith(
+          CrashingCrashReportSender(const SocketException('no internets')));
+
+      unawaited(tools.run(
+        <String>['crash'],
+        <FlutterCommand>[_CrashAsyncCommand()],
+        reportCrashes: true,
+        flutterVersion: 'test-version',
+      ));
+      expect(await exitCodeCompleter.future, 1);
+      expect(testLogger.errorText, contains('Failed to send crash report due to a network error'));
+    }, overrides: <Type, Generator>{
+      Stdio: () => const _NoStderr(),
+    });
+
+    testUsingContext('should print an explanatory message when there is an HttpException', () async {
+      final Completer<int> exitCodeCompleter = Completer<int>();
+      setExitFunctionForTests((int exitCode) {
+        exitCodeCompleter.complete(exitCode);
+      });
+
+      CrashReportSender.initializeWith(
+          CrashingCrashReportSender(const HttpException('no internets')));
+
+      unawaited(tools.run(
+        <String>['crash'],
+        <FlutterCommand>[_CrashAsyncCommand()],
+        reportCrashes: true,
+        flutterVersion: 'test-version',
+      ));
+      expect(await exitCodeCompleter.future, 1);
+      expect(testLogger.errorText, contains('Failed to send crash report due to a network error'));
+    }, overrides: <Type, Generator>{
+      Stdio: () => const _NoStderr(),
+    });
+
     testUsingContext('should send crash reports when async throws', () async {
       final Completer<int> exitCodeCompleter = Completer<int>();
       setExitFunctionForTests((int exitCode) {
@@ -270,6 +312,13 @@ class MockCrashReportSender extends MockClient {
   static int sendCalls = 0;
 }
 
+class CrashingCrashReportSender extends MockClient {
+  CrashingCrashReportSender(Object exception)
+      : super((Request request) async {
+    throw exception;
+  });
+}
+
 /// Throws a random error to simulate a CLI crash.
 class _CrashCommand extends FlutterCommand {