"Cannot read properties of undefined (reading 'label')" during code completion #4451
Description
Reported in #4421 by @incendial:
2023-03-03 17:49:00.451 [error] [Dart-Code.dart-code] provider FAILED
2023-03-03 17:49:00.451 [error] TypeError: Cannot read properties of undefined (reading 'label')
at shouldTriggerCompletionAgain (/Users/dimannich/.vscode/extensions/dart-code.dart-code-3.60.1/out/dist/extension.js:5474:39)
at LspAnalyzer.<anonymous> (/Users/dimannich/.vscode/extensions/dart-code.dart-code-3.60.1/out/dist/extension.js:5556:25)
at Generator.next (<anonymous>)
at fulfilled (/Users/dimannich/.vscode/extensions/dart-code.dart-code-3.60.1/out/dist/extension.js:5381:58)
at runNextTicks (node:internal/process/task_queues:61:5)
at process.processImmediate (node:internal/timers:437:9)
Something is causing code completions without labels.