[dart2js] Compiler crash 'classNode' was called on null #47691
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dart2js-crash
type-bug
Incorrect behavior (everything from a crash to more subtle misbehavior)
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lrhn
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How is |
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@fishythefish I tried to break it down as much as possible. The compiler only crashes when the method is injected via riverpod (using stable version 1.0.0 here). Again, iterating over import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
final loadElementsProvider = Provider((ref) {
return LoadElements();
});
class LoadElements {
Future<List> call() => Future.value([]);
}
final viewModelProvider = Provider((ref) {
return ViewModel(ref.read(loadElementsProvider))..init();
});
class ViewModel {
ViewModel(this._loadElements);
final LoadElements _loadElements;
void init() async {
final elements = await _loadElements();
for (final element in elements) {
print(element);
}
}
}
void main() {
runApp(const ProviderScope(child: Example()));
}
class Example extends ConsumerWidget {
const Example({Key? key}) : super(key: key);
@override
Widget build(BuildContext context, WidgetRef ref) {
final model = ref.watch(viewModelProvider);
return const SizedBox();
}
}Stack trace |
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Here's a repro without dependencies: class LoadElements {
Future<List> call() => Future.value([]);
}
class ViewModel {
ViewModel(this._loadElements);
final LoadElements _loadElements;
void init() async {
final elements = await _loadElements();
for (final element in elements) {
print(element);
}
}
}
void main() {
ViewModel(LoadElements()).init();
}Attempting to compile with or without null-safety should produce the crash. I'll try to investigate further. |
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Looks like the core issue is that |
copybara-service bot
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Nov 18, 2021
Bug: #47691 Change-Id: I14a0b5f027b6a5ed74dd22b63e3c103b380823eb Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/220780 Reviewed-by: Sigmund Cherem <sigmund@google.com>
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The following method causes a compiler crash when building without null safety. (
The getter 'classNode' was called on null)Iterating over
iinstead will resolve it.Building without sound null safety
OS: macOS Big Sur 11.4 (20F71)
Dart SDK: 2.14.4
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