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Stack frame parser is crashing with malformed asynchronous gap lines #59893
Description
Description
When running tests, exceptional behavior sometimes causes the diagnostics to crash with an exception similar to the following:
══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following assertion was thrown running a test:
Expected ===== asynchronous gap =========================== to match RegExp: pattern=^(.+)
(\d+):(\d+)\s+(.+)$ flags=.
'package:flutter/src/foundation/stack_frame.dart':
Failed assertion: line 115 pos 12: 'match != null'
Either the assertion indicates an error in the framework itself, or we should provide substantially
more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=BUG.md
When the exception was thrown, this was the stack:
#2 StackFrame._parseWebDebugFrame (package:flutter/src/foundation/stack_frame.dart:115:12)
#3 StackFrame._parseWebFrame (package:flutter/src/foundation/stack_frame.dart:101:14)
#4 StackFrame.fromStackTraceLine (package:flutter/src/foundation/stack_frame.dart:195:14)
#5 MappedListIterable.elementAt (dart:_internal/iterable.dart:417:31)
#6 ListIterator.moveNext (dart:_internal/iterable.dart:343:26)
#7 SkipWhileIterator.moveNext (dart:_internal/iterable.dart:680:22)
#8 new List.from (dart:core-patch/array_patch.dart:50:19)
#9 new List.of (dart:core-patch/array_patch.dart:68:17)
#10 Iterable.toList (dart:core/iterable.dart:404:12)
#11 StackFrame.fromStackString (package:flutter/src/foundation/stack_frame.dart:96:10)
#12 FlutterError.defaultStackFilter (package:flutter/src/foundation/assertions.dart:945:54)
#13 new DiagnosticsStackTrace (package:flutter/src/foundation/assertions.dart:1088:59)
#14 FlutterErrorDetails.debugFillProperties (package:flutter/src/foundation/assertions.dart:650:22)
#15 DiagnosticableNode.builder.<anonymous closure> (package:flutter/src/foundation/diagnostics.dart:2944:18)
#16 DiagnosticableNode.builder (package:flutter/src/foundation/diagnostics.dart:2947:8)
#17 _FlutterErrorDetailsNode.builder (package:flutter/src/foundation/assertions.dart:1126:55)
#18 DiagnosticableNode.getProperties (package:flutter/src/foundation/diagnostics.dart:2961:105)
#19 TextTreeRenderer._debugRender (package:flutter/src/foundation/diagnostics.dart:1250:63)
#20 TextTreeRenderer.render (package:flutter/src/foundation/diagnostics.dart:1128:14)
#21 FlutterError.dumpErrorToConsole (package:flutter/src/foundation/assertions.dart:900:11)
#22 TestWidgetsFlutterBinding._runTest.<anonymous closure> (package:flutter_test/src/binding.dart:618:24)
#23 FlutterError.reportError (package:flutter/src/foundation/assertions.dart:1032:14)
#24 TestWidgetsFlutterBinding._runTest.handleUncaughtError (package:flutter_test/src/binding.dart:690:20)
#25 TestWidgetsFlutterBinding._runTest.<anonymous closure> (package:flutter_test/src/binding.dart:714:28)
#30 TestWidgetsFlutterBinding._runTestBody (package:flutter_test/src/binding.dart)
This crash can be reproduced with the following test:
testWidgets('async gap', (tester) async {
final ctrl = Completer<String>();
ctrl.future.then((value) {}, onError: (dynamic err, StackTrace bt) {
FlutterError.reportError(FlutterErrorDetails(
exception: err,
stack: bt,
));
});
ctrl.completeError('Test');
});Version
Flutter 1.20.0-1.0.pre • channel master • https://github.com/flutter/flutter
Framework • revision 401690a64f (7 days ago) • 2020-06-12 19:45:48 -0700
Engine • revision 965fbbed17
Tools • Dart 2.9.0 (build 2.9.0-14.0.dev 2b917f5b6a)
Activity
pingbird commentedon Jun 19, 2020
cc @dnfield
Initial debugging shows that the malformed stack trace is coming from
package:stack_trace'sChainimplementation ofStackTrace, which uses a different delimiter for async gaps.github-actions commentedon Aug 19, 2021
This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of
flutter doctor -vand a minimal reproduction of the issue.