Incompatiblity with recordStackTraceAtLevel from the Logging package

[maBarabas]

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! Doctor found issues in 1 category.

Version

7.9.0

Steps to Reproduce

1. Set up a project using the logging package integration
2. Set recordStackTraceAtLevel = Level.SEVERE. The makes Logging automatically set the error to a string, and assign the current stacktrace to the log.
3. Fire a severe log: Logger('test').severe('hello world')

The snippet from Logger.log that auto generates the String is:

    if (stackTrace == null && logLevel >= recordStackTraceAtLevel) {
      stackTrace = StackTrace.current;
      error ??= 'autogenerated stack trace for $logLevel $msg';
    }

Expected Result

Error is captured, and sentry does not print internal errors.

Sentry logging integration should be compatible with all types accepted by the Logging package. The signature or log is:

void log(
    Level logLevel,
    Object message,
    [Object? error,
    StackTrace stackTrace,
    Zone? zone]
)

Therefore, Sentry should not have internal errors regardless of the type of the error. At the very least, it needs to support String for this use case. I guess this can be worked around by constructing an Exception from the String, but this must be done inside Sentry.

Actual Result

Sentry logs an internal error:

[sentry] [info] Throwable type: String is not supported for associating errors to a transaction.
         Invalid argument (object): Cannot be a string, number, boolean, record, null, Pointer, Struct or Union: "autogenerated stack tra...
         #0      checkValidWeakTarget (dart:_internal-patch/internal_patch.dart:220:5)
         #1      Expando.[] (dart:core-patch/expando_patch.dart:31:5)
         #2      _WeakMap.get (package:sentry/src/hub.dart:619:22)
         #3      Hub._assignTraceContext (package:sentry/src/hub.dart:559:37)
         #4      Hub.captureEvent (package:sentry/src/hub.dart:94:19)
         <asynchronous suspension>
         #5      LoggingIntegration._onLog (package:sentry_logging/src/logging_integration.dart:58:7)
         <asynchronous suspension>

It seems like the error is captured regardless. Maybe it will be missing from the transation that was in progress.

Are you willing to submit a PR?

None

[krystofwoldrich]

Hi,
thank you for the message and the details. We can't reproduce the behavior.

Here is an example stack trace reported to Sentry.

Code snippet:

recordStackTraceAtLevel = Level.SEVERE;
final log = Logger('Logging');
log.severe('My Logging test severe');

Can you share a minimal reproducible example?

[marandaneto]

Hi @maBarabas
Yes, the errors and transactions won't be linked if the error type isn't supported.

sentry-dart/dart/lib/src/hub.dart

Lines 605 to 610 in d783424

	_options.logger(
	SentryLevel.info,
	'Throwable type: ${throwable.runtimeType} is not supported for associating errors to a transaction.',
	exception: exception,
	stackTrace: stackTrace,
	);

This is just an info logging so nothing to be worried about.

I guess this can be worked around by constructing an Exception from the String, but this must be done inside Sentry.

This could be done but the problem is that if the same error is thrown twice, since a new object is constructed every time, the expando won't identify as the same object.
It's a limitation of the Expando and WeakReference classes in Dart.

Maybe if the wrapper exception overrides bool operator ==(Object other) and int get hashCode;, I have to check this out.