bugsnag-js
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React Native iOS does not report error causes (or multiple errors from an error array)
Describe the bug
package: @bugsnag/react-native
iOS does not report error causes (It works fine in Android).
Root cause is that the iOS event deserializer is hard-coded to only inspect/deserialize the first error that is reported https://github.com/bugsnag/bugsnag-js/blob/05588a1c7a58e538cf1763d81a2eeae59ac76124/packages/react-native/ios/BugsnagReactNative/BugsnagEventDeserializer.m#L48
Additionally, I found that the bugsnag-cocoa
pod also hard-codes attachment of stack traces to the first error in the BugsnagEvent#errors
array in the attachCustomStacktrace function which is also called in the event deserializer here (this makes it difficult to provide a full solution without also making changes to bugsnag-cocoa
or duplicating some logic from bugsnag-cocoa
into the bugsnag-js
repo).
- (void)attachCustomStacktrace:(NSArray *)frames withType:(NSString *)type {
BugsnagError *error = self.errors.firstObject;
error.stacktrace = [BugsnagStacktrace stacktraceFromJson:frames].trace;
error.typeString = type;
}
Steps to reproduce
- Report an error with a cause property assigned
- View the report in the Bugsnag web UI
- See the cause is not reported
Environment
- Bugsnag version:
7.20.2
- Browser framework version (if any):
- n/a
- Server framework version (if any):
- n/a
- Device (e.g. iphonex):
- Any iPhone device
Example code snippet
const cause = new Error('This is the cause');
const error = new Error('This is the error', {cause});
bugsnag.notify(error);