From a48446f94b0119186de0da98c6723c864bb47d03 Mon Sep 17 00:00:00 2001
From: Todd Volkert <tvolkert@users.noreply.github.com>
Date: Fri, 24 Jul 2020 15:50:01 -0700
Subject: [PATCH] Fix error handling for errors with empty stack traces
 (#62224)

Fixes https://github.com/flutter/flutter/issues/62223
---
 .../lib/src/foundation/stack_frame.dart       |  1 +
 .../test/foundation/error_reporting_test.dart | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/packages/flutter/lib/src/foundation/stack_frame.dart b/packages/flutter/lib/src/foundation/stack_frame.dart
index c190a3024d..f10d9cf496 100644
--- a/packages/flutter/lib/src/foundation/stack_frame.dart
+++ b/packages/flutter/lib/src/foundation/stack_frame.dart
@@ -86,6 +86,7 @@ class StackFrame {
     return stack
         .trim()
         .split('\n')
+        .where((String line) => line.isNotEmpty)
         .map(fromStackTraceLine)
         // On the Web in non-debug builds the stack trace includes the exception
         // message that precedes the stack trace itself. fromStackTraceLine will
diff --git a/packages/flutter/test/foundation/error_reporting_test.dart b/packages/flutter/test/foundation/error_reporting_test.dart
index 707ac111f5..a2ee99b983 100644
--- a/packages/flutter/test/foundation/error_reporting_test.dart
+++ b/packages/flutter/test/foundation/error_reporting_test.dart
@@ -201,4 +201,23 @@ Future<void> main() async {
     console.clear();
     FlutterError.resetErrorCount();
   });
+
+  // Regression test for https://github.com/flutter/flutter/issues/62223
+  test('Error reporting - empty stack', () async {
+    expect(console, isEmpty);
+    FlutterError.dumpErrorToConsole(FlutterErrorDetails(
+      exception: 'exception - empty stack',
+      stack: StackTrace.fromString(''),
+    ));
+    expect(console.join('\n'), matches(
+      r'^══╡ EXCEPTION CAUGHT BY FLUTTER FRAMEWORK ╞═════════════════════════════════════════════════════════\n'
+      r'The following message was thrown:\n'
+      r'exception - empty stack\n'
+      r'\n'
+      r'When the exception was thrown, this was the stack:\n'
+      r'...\n'
+      r'════════════════════════════════════════════════════════════════════════════════════════════════════$',
+    ));
+    console.clear();
+  });
 }