Skip to main content

avoid-missing-completer-stack-trace

added in: 1.15.0
warning

Warns when Completer.completeError is called without providing a stack trace.

By default, completeError gets an empty stack trace. Consider passing StackTrace.current or Error(...).stackTrace to the invocation.

Example​

❌ Bad:

import 'dart:async';

void fn() {
  final completer = Completer();
  completer.completeError('foo'); // LINT

  Completer().completeError('foo'); // LINT
}

✅ Good:

import 'dart:async';

void fn() {
  final completer = Completer();
  completer.completeError('foo', StackTrace.current);

  Completer().completeError('foo', Error(...).stackTrace);
}